CN111439821B - Method for recovering organic matters in organic matter-containing aqueous solution - Google Patents

Method for recovering organic matters in organic matter-containing aqueous solution Download PDF

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CN111439821B
CN111439821B CN201910045329.2A CN201910045329A CN111439821B CN 111439821 B CN111439821 B CN 111439821B CN 201910045329 A CN201910045329 A CN 201910045329A CN 111439821 B CN111439821 B CN 111439821B
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aqueous solution
organic
organic matters
hydroxide colloid
organic matter
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CN111439821A (en
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赵龙胜
黄小卫
冯宗玉
陈士磊
尹海峰
齐少雷
彭新林
范波
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Grirem Advanced Materials Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract

The invention belongs to the technical field of water resource treatment and recovery, and particularly relates to a method for recovering organic matters in an organic matter-containing aqueous solution. The invention relates to a method for recovering organic matters in an organic matter-containing aqueous solution, which adopts hydroxide colloid to treat the organic matter-containing aqueous solution, utilizes the characteristics of huge specific surface, surface energy and large amount of charges of the hydroxide colloid to make organic matters in the organic matter-containing aqueous solution adsorbed on the surface of the hydroxide colloid in a physical adsorption mode, and further adopts inorganic acid to dissolve organic matter-containing slag obtained by treating the hydroxide colloid, so that the organic matters adsorbed on the surface of the hydroxide colloid can be desorbed, and further the organic matters in the organic matter-containing aqueous solution and the aqueous solution after removing the organic matters are efficiently separated, thereby realizing deep removal and recovery of the organic matters in the organic matter-containing aqueous solution.

Description

Method for recovering organic matters in organic matter-containing aqueous solution
Technical Field
The invention belongs to the technical field of water resource treatment and recovery, and particularly relates to a method for recovering organic matters in an organic matter-containing aqueous solution.
Background
Many industrial processes produce a large amount of aqueous solution containing organic substances, and the organic substances contained in the aqueous solution are lost by dissolution and/or entrainment, which not only significantly increases the production cost, but also brings huge environmental risks to the ecological environment if recycling can not be realized. Therefore, the method has important significance in deep removal and efficient recovery of organic matters contained in the organic matter-containing aqueous solution.
In general, the insoluble organic matter part in the aqueous solution containing organic matter can be separated from most organic matter components by gravity natural phase separation or air floatation method, while small amount of entrained organic matter droplets and dissolved organic matter are difficult to separate even after standing for several days, and a corresponding separation method must be adopted. At present, the methods for removing low content or dissolved organic matters in an organic matter-containing aqueous solution mainly comprise a degradation method and an adsorption method. The degradation method is a method of converting organic substances into inorganic substances and removing them by a chemical precipitation method using a certain oxidation method including oxidation with an oxidizing agent, electrolytic oxidation, biological oxidation, etc., but the method has problems of high degradation cost and low recovery rate of organic substances. The adsorption method mainly comprises two methods: one is to add adsorbent directly into the water solution containing organic matter to remove organic matter, the other is to fill the adsorbent into the adsorption column to remove organic matter, the adsorbent is usually selected to mainly comprise insoluble rare earth compounds, iron salt, aluminum salt, activated carbon, adsorption ceramic and the like, wherein the insoluble rare earth compounds (including rare earth carbonate, basic rare earth carbonate, rare earth hydroxide, rare earth oxide, rare earth fluoride and the like) can react with acidic phosphine extractants such as P204, P507 and the like to generate insoluble rare earth organic saponification materials, and then the insoluble rare earth organic saponification materials are adsorbed or hung on the insoluble rare earth compounds. However, the method has the problems of complex flow and high cost, and the regeneration of the insoluble rare earth compound needs to be cooperated with a separation plant, and the like, and corresponding filtering equipment needs to be additionally arranged, so that the cost is high.
Therefore, in order to recover the organic matters in the aqueous solution containing the organic matters, a universal method with simple process, low cost and eco-friendly needs to be developed to realize the deep removal and high-efficiency recovery of the organic matters in the aqueous solution containing the organic matters.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a method for recovering organic matters from an aqueous solution containing organic matters, so as to solve the problems of difficult recovery of organic matters from an aqueous solution containing organic matters, complicated process and high cost in the prior art.
In order to solve the technical problem, the method for recovering the organic matters in the aqueous solution containing the organic matters comprises the following steps:
(1) Treating the aqueous solution containing the organic matters by using hydroxide colloid, and respectively obtaining the aqueous solution after removing the organic matters and the residue containing the organic matters through liquid-solid separation;
(2) Dissolving the residues containing the organic matters by adopting inorganic acid, and respectively obtaining a water phase containing metal ions and organic matters by standing and phase splitting.
In the step (1), the hydroxide colloid includes magnesium, calcium, aluminum, iron or rare earth hydroxide colloid.
The molar concentration of the hydroxide colloid is 0.1 to 2.5mol/L, preferably 0.5 to 2.5mol/L.
The particle size D50 of the hydroxide colloid is 50 to 500nm, preferably 50 to 200nm.
The volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution is 1.
In the step (1), the treatment step is performed under stirring, and the stirring time is 5 to 120min, preferably 30 to 60min.
The organic matter-containing aqueous solution is an aqueous solution containing at least one organic matter, preferably at least one of P507, P204, P227, C272, naphthenic acid, TBP, N235 or kerosene.
The step (1) further comprises a step of adjusting the pH value of the organic matter-containing aqueous solution to 4 to 6.
The step of adjusting the pH value is carried out by using an alkaline compound, and the alkaline compound is at least one selected from calcium oxide, calcium carbonate, calcium hydroxide, light-burned dolomite, sodium carbonate and sodium hydroxide.
In the step (2), the inorganic acid includes at least one of hydrochloric acid, nitric acid, and sulfuric acid.
In the step (2), a step of preparing hydroxide colloid with the separated aqueous phase containing the metal ions is also included, namely a step of dissolving/digesting inorganic alkaline compound to obtain alkaline solution/slurry is included; and a step of adding the aqueous phase containing the metal ions into the alkaline solution/slurry to react to prepare the hydroxide colloid. The inorganic alkaline compound comprises sodium hydroxide, calcium oxide and/or light-burned dolomite and other inorganic alkaline compounds which can be used for preparing magnesium, calcium, aluminum, iron or rare earth hydroxide colloid.
And the sodium hydroxide, the calcium oxide and/or the light-burned dolomite are dissolved or digested by clear water.
The invention relates to a method for recovering organic matters in an organic matter-containing aqueous solution, which adopts hydroxide colloid to treat the organic matter-containing aqueous solution, utilizes the characteristics of huge specific surface, surface energy and large amount of charges of the hydroxide colloid to make the organic matters in the organic matter-containing aqueous solution adsorbed on the surface of the colloid in a physical adsorption mode, and further adopts inorganic acid to dissolve organic matter-containing slag obtained by treating the hydroxide colloid, so that the organic matters adsorbed on the surface of the hydroxide colloid can be desorbed, the organic matters in the organic matter-containing aqueous solution are efficiently separated from the aqueous solution after the organic matters are removed, and further the deep removal and the efficient recovery of the organic matters in the organic matter-containing aqueous solution are realized.
The method of the invention uses hydroxide colloid to carry out organic matter recovery treatment on the aqueous solution containing organic matters, after one-step treatment, the content of the organic matters in the obtained aqueous solution after removing the organic matters can be reduced to below 15mg/L, the recovery treatment process is simple, and the consumption of the hydroxide colloid is extremely low. In addition, because the organic matter is adsorbed on the surface of the hydroxide colloid in a physical adsorption mode, only a small amount of inorganic acid is consumed, and the organic matter adsorbed on the surface of the hydroxide colloid can be desorbed and recovered through a simple dissolving process, so that the whole process is simple and feasible.
The method of the invention adopts inorganic acid to treat the obtained water phase containing metal ions, and the water phase can be completely returned to be used for preparing the hydroxide colloid, thereby realizing near zero emission of the acidic wastewater, being environment-friendly, realizing the recycling of the metal ions in the hydroxide colloid, and effectively reducing the preparation cost of the hydroxide colloid and the treatment cost of the aqueous solution containing organic matters.
According to the method, before the aqueous solution containing the organic matters is treated by the hydroxide colloid, the pH value of the aqueous solution containing the organic matters is adjusted to 4-6 by adopting the alkaline compound, so that the consumption of the hydroxide colloid in the treatment process can be greatly reduced, the treatment efficiency of the hydroxide colloid is improved, and the production cost is reduced.
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In order that the present disclosure may be more readily and clearly understood, the following detailed description of the present disclosure is provided in connection with specific embodiments thereof and the accompanying drawings, in which,
FIG. 1 is a process flow diagram of the method for recovering organic substances from an aqueous solution containing organic substances according to the present invention.
Detailed Description
Example 1
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P507 and kerosene organic matters, the content of the organic matters is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding a basic compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 4, adding a magnesium hydroxide colloid with the granularity of 50nm (controlling the molar concentration of the hydroxide colloid to be 0.1 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And adding 2mol/L hydrochloric acid into the separated organic-containing slag, fully stirring and dissolving, then, standing for two-phase separation, directly separating to obtain a metal ion-containing water phase and an organic matter and recovering the upper-layer organic matter, wherein the pH value of the separated metal ion-containing water phase is 0.5-3, collecting the separated organic matter, and completing the recovery of the organic matter.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the required magnesium hydroxide colloid, thereby realizing the circulation of the materials in the whole process.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 7.8mg/L, the removal rate of the organic phase is 98.8 percent, and the total recovery rate of the organic matters is calculated to be 95.2 percent.
Example 2
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P507 and kerosene organic matters, wherein the content of the organic matters is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 4, adding magnesium hydroxide colloid with the granularity of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding hydrochloric acid with the concentration of 2mol/L into the organic matter-containing slag obtained by separation, fully stirring and dissolving, then, standing for two-phase separation, directly separating to obtain a water phase containing metal ions and organic matters and recovering the organic matters on the upper layer, wherein the pH value of the separated water phase containing the metal ions is 0.5-3, collecting the separated organic matters, and completing the recovery of the organic matters.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 3.2mg/L, the removal rate of the organic phase is 99.5 percent, and the calculated recovery rate of the organic substances is 97.0 percent.
Example 3
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P507 and kerosene organic matters, wherein the content of an organic phase is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 4, adding magnesium hydroxide colloid with the granularity of 150nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And adding 2mol/L hydrochloric acid into the separated organic-containing slag, fully stirring and dissolving, then, standing for two-phase separation, directly separating to obtain a metal ion-containing water phase and an organic matter and recovering the upper-layer organic matter, wherein the pH value of the separated metal ion-containing water phase is 0.5-3, collecting the separated organic matter, and completing the recovery of the organic matter.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 5.6mg/L, the removal rate of the organic substances is 99.2 percent, and the calculated recovery rate of the organic substances is 95.0 percent.
Example 4
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, the separated organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P507 and kerosene organic matters, wherein the content of the organic matters is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding a basic compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 4, adding a magnesium hydroxide colloid with the granularity of 90nm (controlling the molar concentration of the hydroxide colloid to be 2.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding hydrochloric acid with the concentration of 2mol/L into the organic matter-containing slag obtained by separation, fully stirring and dissolving, then, standing for two-phase separation, directly separating to obtain a water phase containing metal ions and organic matters and recovering the organic matters on the upper layer, wherein the pH value of the separated water phase containing the metal ions is 0.5-3, collecting the separated organic matters, and completing the recovery of the organic matters.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 6.1mg/L, the removal rate of the organic matters is 99.1 percent, and the calculated recovery rate of the organic matters is 95.1 percent.
Example 5
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L, and the pH value is 2.0.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium carbonate to adjust the pH value of the aqueous solution containing the organic matters to 5, adding calcium magnesium hydroxide colloid with the particle size of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium magnesium hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 5.4mg/L, the removal rate of the organic substances is 99.1 percent, and the calculated recovery rate of the organic substances is 95.6 percent.
Example 6
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L, and the pH value is 2.0.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the organic matter-containing aqueous solution, adding alkaline compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 5, adding calcium magnesium hydroxide colloid with the particle size of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding hydrochloric acid with the concentration of 2mol/L into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium magnesium hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 4.5mg/L, the removal rate of the organic matters is 99.2 percent, and the calculated recovery rate of the organic matters is 97.3 percent.
Example 7
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L, and the pH value is 2.0.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium hydroxide to adjust the pH value of the aqueous solution containing the organic matters to 5, adding calcium magnesium hydroxide colloid with the particle size of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium magnesium hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 4.0mg/L, the removal rate of the organic matters is 99.3 percent, and the calculated recovery rate of the organic matters is 96.2 percent.
Example 8
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L, and the pH value is 2.0.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the organic matter-containing aqueous solution, adding an alkaline compound calcium hydroxide to adjust the pH value of the organic matter-containing aqueous solution to 5, adding calcium magnesium hydroxide colloid with the particle size of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium magnesium hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 4.2mg/L, the removal rate of the organic matters is 99.2 percent, and the calculated recovery rate of the organic matters is 96.8 percent.
Example 9
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L, and the pH value is 2.0.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound calcite to adjust the pH value of the aqueous solution containing the organic matters to 5, adding calcium magnesium hydroxide colloid with the particle size of 100nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium magnesium hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.7mg/L, the removal rate of the organic substances is 99.1 percent, and the calculated recovery rate of the organic substances is 95.4 percent.
Example 10
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding a basic compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 6, adding a magnesium iron hydroxide colloid with the particle size of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min without stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 6.8mg/L, the removal rate of the organic matters is 99.0 percent, and the calculated recovery rate of the organic matters is 95.2 percent.
Example 11
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding alkaline compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 6, adding magnesium ferric hydroxide colloid with the particle size of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min under the condition of air stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light-burned dolomite with clear water to obtain an alkaline solution or alkaline slurry, adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the rare earth hydroxide colloid, and realizing the circulation of the materials in the whole process.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.6mg/L, the removal rate of the organic substances is 99.3 percent, and the calculated recovery rate of the organic substances is 96.1 percent.
Example 12
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding a basic compound quicklime to adjust the pH value of the organic matter-containing aqueous solution to 6, adding a magnesium iron hydroxide colloid with the particle size of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.2mg/L, the removal rate of the organic substances is 99.4 percent, and the calculated recovery rate of the organic substances is 96.5 percent.
Example 13
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 6, adding a magnesium ferric hydroxide colloid with the granularity of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 14.8mg/L, the removal rate of the organic matters is 94.4 percent, and the calculated recovery rate of the organic matters is 90.1 percent.
Example 14
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 6, adding a magnesium ferric hydroxide colloid with the granularity of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 16.5mg/L, the removal rate of the organic matters is 97.2 percent, and the calculated recovery rate of the organic matters is 92.3 percent.
Example 15
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 110mg/L, and the pH value is 2.2.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 6, adding a magnesium ferric hydroxide colloid with the granularity of 200nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 30min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L nitric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light-burned dolomite with clear water to obtain an alkaline solution or alkaline slurry, adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the rare earth hydroxide colloid, and realizing the circulation of the materials in the whole process.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.9mg/L, the removal rate of the organic substances is 99.3 percent, and the calculated recovery rate of the organic substances is 95.5 percent.
Example 16
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 50L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 5, adding lanthanum magnesium hydroxide colloid with the granularity of 80nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L sulfuric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, and collecting the separated organic matters to finish the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 5.7mg/L, the removal rate of the organic substances is 98.5 percent, and the calculated recovery rate of the organic substances is 90.0 percent.
Example 17
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 50L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 5, adding lanthanum magnesium hydroxide colloid with the granularity of 80nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1 to 400, and then directly filtering at 20 ℃ to respectively obtain an aqueous solution after removing the organic matters and slag containing the organic matters;
(2) And (3) adding 2mol/L sulfuric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 4.7mg/L, the removal rate of the organic matters is 98.8 percent, and the calculated recovery rate of the organic matters is 95.9 percent.
Example 18
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 50L of the aqueous solution containing the organic matters, adding a basic compound quicklime to adjust the pH value of the aqueous solution containing the organic matters to 5, adding lanthanum magnesium hydroxide colloid with the granularity of 80nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L sulfuric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 8.2mg/L, the removal rate of the organic matters is 98.0 percent, and the calculated recovery rate of the organic matters is 95.7 percent.
Example 19
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium hydroxide to adjust the pH value of the aqueous solution containing the organic matters to 3, adding magnesium aluminum hydroxide colloid with the particle size of 250nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the organic substance value is 8.0mg/L, the removal rate of the organic substances is 97.9 percent, and the calculated recovery rate of the organic substances is 95.1 percent.
Example 20
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium hydroxide to adjust the pH value of the aqueous solution containing the organic matters to 4, adding magnesium aluminum hydroxide colloid with the particle size of 250nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting light-burned dolomite with clear water to obtain an alkaline solution or alkaline slurry, adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the rare earth hydroxide colloid, and realizing the circulation of the materials in the whole process.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 6.1mg/L, the removal rate of the organic matters is 98.5 percent, and the calculated recovery rate of the organic matters is 96.3 percent.
Example 21
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium hydroxide to adjust the pH value of the aqueous solution containing the organic matters to 5, adding magnesium aluminum hydroxide colloid with the granularity of 250nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting light-burned dolomite with clear water to obtain an alkaline solution or alkaline slurry, adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the rare earth hydroxide colloid, and realizing the circulation of the materials in the whole process.
In the aqueous solution containing organic substances after the treatment, the organic substance value is 5.3mg/L, the removal rate of the organic substances is 98.8 percent, and the calculated recovery rate of the organic substances is 96.2 percent.
Example 22
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 80mg/L, and the pH value is 1.8.
The recovery method specifically comprises the following steps:
(1) Taking 10L of the aqueous solution containing the organic matters, adding an alkaline compound sodium hydroxide to adjust the pH value of the aqueous solution containing the organic matters to 6, adding magnesium aluminum hydroxide colloid with the particle size of 250nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 40min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1;
(2) And (3) adding 2mol/L hydrochloric acid into the separated organic substance-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic substances, wherein the pH value of the water phase containing the metal ions is preferably 1-2, collecting the separated organic substances, and completing the recovery of the organic substances.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the organic substance value is 5.1mg/L, the removal rate of the organic substances is 98.8 percent, and the calculated recovery rate of the organic substances is 96.2 percent.
Example 23
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P227 and kerosene organic matters, wherein the content of the organic matters is 130mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the aqueous solution containing the organic matters, adding an alkaline compound sodium carbonate to adjust the pH value of the aqueous solution containing the organic matters to 4-6, adding aluminum hydroxide colloid with the granularity of 50-200 nm (controlling the molar concentration of the hydroxide colloid to be 2.5 mol/L), treating for 10min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1 to 1000, and then performing conventional liquid-solid separation to respectively obtain the aqueous solution after removing the organic matters and organic matter-containing slag;
(2) And adding sulfuric acid into the separated organic matter-containing slag, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the sulfuric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, and collecting the separated organic matters to finish the recovery of the organic matters.
Dissolving or digesting an aluminum-containing inorganic alkaline compound by using clear water to obtain an alkaline solution or alkaline slurry, and adding the water phase containing the metal ions separated in the step (2) into the alkaline solution or alkaline slurry to react to prepare the aluminum hydroxide colloid, thereby realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 6.3mg/L, and the calculated recovery rate of the organic matters is 96.4 percent.
Example 24
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains C272 and kerosene organic matters, wherein the content of the organic matters is 135mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the aqueous solution containing the organic matters, adding an alkaline compound sodium carbonate to adjust the pH value of the aqueous solution containing the organic matters to 4-6, adding magnesium hydroxide colloid with the granularity of 50-200 nm (controlling the molar concentration of the hydroxide colloid to be 2.5 mol/L), treating for 10min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the aqueous solution containing the organic matters to be 1 to 1000, and then respectively obtaining the aqueous solution and the slag containing the organic matters after removing the organic matters through conventional liquid-solid separation;
(2) And (3) adding sulfuric acid into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the sulfuric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, and collecting the separated organic matters to finish the recovery of the organic matters.
Dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain an alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the magnesium hydroxide colloid, thereby realizing the circulation of the materials in the whole process.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 6.6mg/L, and the calculated recovery rate of the organic substances is 96.7 percent.
Example 25
In the method for recovering organic matters from an aqueous solution containing organic matters, the aqueous solution containing organic matters is used as a treatment stock solution to extract the organic matters contained in the aqueous solution containing organic matters, and detection shows that the aqueous solution containing organic matters contains naphthenic acid, isooctanol and kerosene, wherein the content of the organic matters is 1500mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the organic matter-containing aqueous solution, adding an alkaline compound sodium carbonate to adjust the pH value of the organic matter-containing aqueous solution to 4-6, adding magnesium hydroxide colloid with the particle size of 50-200 nm (controlling the molar concentration of the hydroxide colloid to be 2.5 mol/L), treating for 10min under the condition of air stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding sulfuric acid into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the sulfuric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, and collecting the separated organic matters to finish the recovery of the organic matters.
Dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain an alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry for reaction to prepare the magnesium hydroxide colloid, thereby realizing the circulation of the materials in the whole process.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 13.1mg/L, and the calculated recovery rate of the organic substances is 99.1 percent.
Example 26
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P507 and kerosene organic matters, wherein the content of the organic matters is 60mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the organic matter-containing aqueous solution, adding an alkaline compound sodium hydroxide to adjust the pH value of the organic matter-containing aqueous solution to 4-6, adding iron hydroxide colloid with the particle size of 100-200 nm (controlling the molar concentration of the hydroxide colloid to be 1 mol/L), treating for 45min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding hydrochloric acid into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the hydrochloric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, and collecting the separated organic matters to finish the recovery of the organic matters.
Dissolving or digesting an iron-containing inorganic alkaline compound with clear water to obtain an alkaline solution or alkaline slurry, and adding the aqueous phase containing the metal ions separated in the step (2) into the alkaline solution or alkaline slurry to react to prepare the ferric hydroxide colloid, thereby realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.4mg/L, and the calculated recovery rate of the organic substances is 95.8 percent.
Example 27
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P507 and kerosene organic matters, wherein the content of the organic matters is 120mg/L.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the organic matter-containing aqueous solution, adding an alkaline compound calcium oxide to adjust the pH value of the organic matter-containing aqueous solution to 4-6, adding magnesium hydroxide colloid with the particle size of 50-500 nm (controlling the molar concentration of the hydroxide colloid to be 0.1 mol/L), treating for 60min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding hydrochloric acid into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the hydrochloric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 0.5-3, collecting the separated organic matters, and completing the recovery of the organic matters.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 6.8mg/L, and the calculated recovery rate of the organic substances is 96.1 percent.
Example 28
In the method for recovering organic matters from an organic matter-containing aqueous solution described in this embodiment, an organic matter-containing aqueous solution is used as a treatment stock solution to extract organic matters contained therein, and detection shows that the organic matter-containing aqueous solution contains P204 and kerosene organic matters, wherein the content of the organic matters is 100mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the organic matter-containing aqueous solution, adding an alkaline compound calcium oxide to adjust the pH value of the organic matter-containing aqueous solution to 5-6, adding calcium hydroxide colloid with the particle size of 50-200 nm (controlling the molar concentration of the hydroxide colloid to be 0.5 mol/L), treating for 30min under the condition of mechanical stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1;
(2) And (3) adding hydrochloric acid into the separated organic-containing residues, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and an organic matter, wherein the concentration of the hydrochloric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, collecting the separated organic matter, and completing the recovery of the organic matter.
Dissolving or digesting calcium oxide with clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the calcium hydroxide colloid, thereby realizing the circulation of the whole process material.
In the aqueous solution containing organic substances after the treatment, the content of the organic substances is 4.7mg/L, and the calculated recovery rate of the organic substances is 96.9 percent.
Example 29
In the method for recovering organic matters from an organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by using the aqueous solution as a treatment stock solution, and through detection, the aqueous solution contains P204, P507 and kerosene organic matters, wherein the content of the organic matters is 100mg/L.
The recovery method specifically comprises the following steps:
(1) Taking the organic matter-containing aqueous solution, adding an alkaline compound calcium oxide to adjust the pH value of the organic matter-containing aqueous solution to 4-6, adding a rare earth hydroxide colloid with the particle size of 50-200 nm (controlling the molar concentration of the hydroxide colloid to be 1.5 mol/L), treating for 20min under the condition of air stirring, controlling the volume ratio of the hydroxide colloid to the organic matter-containing aqueous solution to be 1.800, and then performing conventional liquid-solid separation to respectively obtain an aqueous solution and organic matter-containing slag after organic matter removal;
(2) And (3) adding nitric acid into the organic matter-containing slag obtained by separation, fully stirring and dissolving, standing for two-phase separation to respectively obtain a water phase containing metal ions and organic matters, wherein the concentration of the nitric acid is proper to ensure that the pH value of the separated water phase containing the metal ions is 1-2, collecting the separated organic matters, and completing the recovery of the organic matters.
Dissolving or digesting light calcined dolomite with clear water to obtain alkaline solution or alkaline slurry, adding the water phase containing metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the rare earth hydroxide colloid, and realizing the circulation of the whole process material.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 5.2mg/L, and the calculated recovery rate of the organic matters is 95.2 percent.
Comparative example 1
According to the method for recovering the organic matters in the organic matter-containing aqueous solution, the organic matters contained in the aqueous solution are extracted by taking the aqueous solution containing the organic matters as a treatment stock solution, and through detection, the aqueous solution containing the organic matters contains P507 and kerosene organic matters, wherein the content of the organic matters is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding calcium oxide with the particle size of 1 mu m, treating for 60min at 30 ℃ under the condition of mechanical stirring, controlling the mass ratio of the calcium oxide to the aqueous solution containing the organic matters to be 1/500, and then naturally settling for 8h at 30 ℃ in a conventional way to respectively obtain an aqueous solution after organic matters are removed and slag containing the organic matters;
(2) And adding 2mol/L hydrochloric acid into the separated organic-containing slag, fully stirring and dissolving the mixture, then, standing the mixture for two-phase separation, directly separating to obtain a water phase containing metal ions and organic matters and recovering the upper-layer organic matters, blending the water phase, returning the water phase to the ion-leaching ore, adjusting the pH value of the separated water phase containing the metal ions to be 0.5-3, collecting the separated organic matters, and completing the recovery of the organic matters.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 78mg/L, the removal rate of the organic matters is 80.0 percent, and the calculated recovery rate of the organic matters is 40.0 percent.
Comparative example 2
According to the method for recovering the organic matters in the aqueous solution containing the organic matters, the aqueous solution containing the organic matters is taken as a treatment stock solution to extract the organic matters contained in the aqueous solution containing the organic matters, and the aqueous solution containing the organic matters contains P507 and kerosene organic matters through detection, wherein the content of the organic matters is 120mg/L, and the pH value is 2.1.
The recovery method specifically comprises the following steps:
(1) Taking 20L of the aqueous solution containing the organic matters, adding calcium carbonate with the particle size of 1 mu m, treating for 60min under the condition of mechanical stirring, controlling the mass ratio of the calcium oxide to the aqueous solution containing the organic matters to be 1;
(2) And adding 2mol/L hydrochloric acid into the separated organic-containing slag, fully stirring and dissolving the mixture, then, standing the mixture for two-phase separation, directly separating to obtain a water phase containing metal ions and organic matters and recovering the upper-layer organic matters, blending the water phase, returning the water phase to the ion-leaching ore, adjusting the pH value of the separated water phase containing the metal ions to be 0.5-3, collecting the separated organic matters, and completing the recovery of the organic matters.
And (3) dissolving or digesting another magnesium-containing inorganic alkaline compound by using clear water to obtain alkaline solution or alkaline slurry, and adding the water phase containing the metal ions obtained by separation in the step (2) into the alkaline solution or alkaline slurry to react to prepare the magnesium hydroxide colloid, so that the circulation of the whole process material is realized.
In the aqueous solution containing the organic matters after the treatment, the content of the organic matters is 56mg/L, the removal rate of the organic matters is 87.0 percent, and the calculated recovery rate of the organic matters is 30.0 percent.
From the data, the method provided by the invention has the advantages that the hydroxide colloid is used for carrying out organic matter recovery treatment on the aqueous solution containing the organic matters, the content of the organic matters in the aqueous solution can be reduced to below 15mg/L after the organic matters are removed in one step, the recovery rate of the organic matters can reach above 95%, and the deep removal and the efficient recovery of the organic matters in the aqueous solution containing the organic matters can be realized.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (7)

1. A method for recovering organic matters in an organic matter-containing aqueous solution is characterized by comprising the following steps:
(1) Treating the aqueous solution containing the organic matters by using hydroxide colloid, and respectively obtaining the aqueous solution after removing the organic matters and organic matter-containing slag through liquid-solid separation;
the hydroxide colloid comprises magnesium, calcium, aluminum, iron or rare earth hydroxide colloid;
the granularity D50 of the hydroxide colloid is 50-500 nm;
(2) Dissolving the residues containing the organic matters by adopting inorganic acid, and respectively obtaining a water phase containing metal ions and organic matters by standing and phase splitting;
the organic matter-containing aqueous solution is a solution containing at least one organic matter; the organic matter is at least one of P507, P204, P227, C272, naphthenic acid, TBP, N235 or kerosene.
2. The method according to claim 1, wherein the molar concentration of the hydroxide colloid is 0.1 to 2.5mol/L.
3. The method according to claim 1 or 2, wherein the volume ratio of the hydroxide colloid to the organic substance-containing aqueous solution is 1.
4. The method according to claim 1 or 2, further comprising the step of adjusting the pH of the aqueous solution containing organic substances to 4 to 6 before the aqueous solution containing organic substances is treated with the hydroxide colloid in the step (1).
5. The method according to claim 4, wherein the step of adjusting the pH is performed using an alkaline compound selected from at least one of calcium oxide, calcium carbonate, calcium hydroxide, calcined dolomite, sodium carbonate, and sodium hydroxide.
6. The method according to claim 1 or 2, wherein the inorganic acid in the step (2) comprises at least one of hydrochloric acid, nitric acid, and sulfuric acid.
7. The method for recovering organic substances from an aqueous solution containing organic substances according to claim 1 or 2, wherein the step (2) further comprises a step of preparing a hydroxide colloid from the separated aqueous phase containing metal ions, i.e. a step of dissolving/digesting an inorganic alkaline compound to obtain an alkaline solution/slurry; and a step of adding the aqueous phase containing the metal ions into the alkaline solution/slurry to react to prepare the hydroxide colloid.
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