CN108479689A - A kind of adsorbent of removal arsenic in waste water acid ion - Google Patents
A kind of adsorbent of removal arsenic in waste water acid ion Download PDFInfo
- Publication number
- CN108479689A CN108479689A CN201810368700.4A CN201810368700A CN108479689A CN 108479689 A CN108479689 A CN 108479689A CN 201810368700 A CN201810368700 A CN 201810368700A CN 108479689 A CN108479689 A CN 108479689A
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- adsorbent
- waste water
- arsenic
- arsenate
- magnesium iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention provides a kind of a kind of methods removing arsenic in waste water acid group based on magnesium iron binary hydrotalcite, belong to field of environment protection water process adsorption technology direction.Mg is prepared by the way of co-precipitation2Fe LDHs adsorbents.At ambient temperature, it is (0.16 8) by the mass ratio of contained arsenate anion in adsorbent and waste water：The adsorbent is added in waste water solution by 1 ratio, stirs 1h, you can reach adsorption equilibrium.The amount of the adsorbent arsenic-adsorbing acid radical anion is up to 415mg/g.This method has the advantages that at low cost, simple for process, high treating effect.
Description
Technical field
The present invention relates to water-treatment technology fields, and in particular to magnesium iron binary neatly masonry adsorbent is removed arsenic in waste water
The application of acid group.
Background technology
Arsenic be it is current it is found that one of the strongest substance of toxicity, it can cause human liver, kidney function damage, destroy
Nerve, hemic and immune system even can cause cancer when serious.Water environment is that arsenic generates and discharge important Jie of toxic effect
Matter and approach.The human activities such as the discharge of the waste water containing arsenics such as metallurgy, chemical industry, process hides, weaving and the use of the pesticide containing arsenic
So that the surface water or underground Water jet cleaning of certain areas drastically increase, people's health is seriously threatened.Arsenate is arsenic in water
A kind of common existence form in body, thus research and development be effectively treated the waste water containing arsenate technology it is very necessary.
It is the precipitation method to go the common method of arsenate in water removal at present, and arsenate can form indissoluble with many metal ions
Salt can effectively remove the arsenic acid in water body using calcium oxide or calcium hydroxide, carbide slag etc. by way of co-precipitation
Root.Other precipitation method also have molysite deposition method, the aluminium salt precipitation method, the magnesium salts precipitation method, phosphate method, vulcanization etc..Coprecipitation
Though the arsenate in water body can be removed temporarily, as time go on, the arsenate in precipitation can be gradually sustained in water body,
Cause secondary pollution.Other than the precipitation method, also absorption method, ion-exchange, ion-cleaning method, electrocoagulation, extraction
Deng.Absorption method is widely used on removal water pollutant, has the advantages that at low cost, simple for process, high treating effect.
Layered double hydroxide (LDH) material is widely used in due to the tradable characteristic of its interlayer anion
Water treatment field.Domestic patent CN1830822A, CN104801527A reports Mg (Zn) Al-LDHs, CaAl-LDHs energy respectively
Method for adsorbing the arsenate in waste water, but its adsorption efficiency is very low, and require a great deal of time to prepare
LDHs is not well positioned to meet the requirement of commercial Application.
In order to overcome the deficiencies in the prior art, the present invention to use a kind of simple and convenient process for preparing, it is only necessary to very in short-term
Between can prepare high-performance adsorbent, the ability of absorption arsenate reaches 415mg/g, show huge application potential and compared with
Big economic value.
Invention content
The purpose of the present invention is to provide a kind of adsorbents of removal arsenic in waste water acid group.
The purpose of the present invention is achieved through the following technical solutions：
A. reaction solution is prepared：The mixed solution of magnesium nitrate and ferric nitrate and the mixed solution of sodium carbonate and sodium hydroxide is same
When be added drop-wise in deionized water, wherein in the mixed solution of the magnesium nitrate and ferric nitrate magnesium ion and iron ion molar ratio
It is 2:1、3:1 or 4:1, preferably 2:1, carbonate rubs with hydroxy in the mixed solution of the sodium carbonate and sodium hydroxide
You are than being 3:1；
B. coprecipitation reaction：Above-mentioned reaction solution is controlled with (0.5-20) mL/min rate of addition, the pH of deionized water in 6-
11；
C. then the above-mentioned magnesium iron binary hydrotacite suspension of centrifugal concentrating dries bottom precipitation, obtains powdered magnesium iron
Binary hydrotalcite；
D. adsorption reaction：Mass ratio by contained arsenate in adsorbent and waste water is (0.16-8)：1 ratio, by this
Adsorbent is added in waste water solution, magnetic agitation, and 1h is reacted at a temperature of 25 DEG C and reaches adsorption equilibrium, filters out adsorbent, should
Method is suitable for the waste water aqueous solution of a concentration of (0.05-0.2) M of arsenate.
Specifically, described in the waste water of a concentration of (6.95-10) mg/mL of arsenate, add (20-100) mg/mL's
Magnesium iron ratio is 2:1 binary hydrotalcite, the maximal absorptive capacity of adsorbent reach 415mg/g.
The method that the present invention is combined by physics with chemical action, the preferred ratio by preparing magnesium and ferro element is 2:1
Magnesium iron binary hydrotalcite, realize maximum Adsorption water body arsenate.
Specific implementation mode
1. preparing Mg2Fe-LDHs
(1) ferric nitrate of the magnesium nitrate of 23.68g and 32.32g is dissolved into the water of 200mL, is named as solution A.It will
The sodium carbonate of 31.8g and the sodium hydroxide of 4g are dissolved into the water of 200mL, are named as solution B.By solution A and solution B with
The speed of 0.5mL/min is added drop-wise in the deionized water of carbon dioxide removal simultaneously, forms reaction solution, by adjusting solution A and molten
The pH of deionized water is remained at (6 ± 0.3) by the rate of addition of liquid B, drips crystallization 6h at ambient temperature, centrifugation
It is dry, obtain powdered Mg2Fe-LDHs。
(2) ferric nitrate of the magnesium nitrate of 23.68g and 32.32g is dissolved into the water of 200mL, is named as solution A.It will
The sodium carbonate of 31.8g and the sodium hydroxide of 4g are dissolved into the water of 200mL, are named as solution B.By solution A and solution B with
The speed of 20mL/min is added drop-wise in the deionized water of carbon dioxide removal simultaneously, forms reaction solution, by adjusting solution A and solution
The pH of deionized water is remained at (11 ± 0.3) by the rate of addition of B, drips crystallization 6h at ambient temperature, and centrifugation is dry
It is dry, obtain powdered Mg2Fe-LDHs。
2. the absorption property of arsenate is tested
By the Mg of 8.8g2In the deionized water of the carbon dioxide removal of the 200mL of Fe-LDHs dispersions, it is mixed evenly, so
The content that arsenate is added afterwards is the natrium arsenicum of 1.39g, after mixing, after stirring 1h, supernatant liquor is obtained by filtration, uses inductance
Coupled plasma spectrometer (ICP) surveys the remaining content of arsenate, by conversion, calculates adsorbent absorption arsenate
Amount, Mg when being computed balance2The amount of the absorption arsenate of Fe-LDHs is 157mg/g.
By the Mg of 0.7g2In the deionized water of the carbon dioxide removal of the 200mL of Fe-LDHs dispersions, it is mixed evenly, so
The content that arsenate is added afterwards is the natrium arsenicum of 5.56g, after mixing, after stirring 1h, supernatant liquor is obtained by filtration, uses inductance
Coupled plasma spectrometer surveys the remaining content of phosphate radical, by conversion, the amount of adsorbent absorption phosphate radical is calculated, through meter
Mg when calculating balance2The amount of the absorption arsenate of Fe-LDHs is 415mg/g.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to restrict the invention, it is all the present invention spirit and
Any modification, equivalent substitution, improvement and etc. done within principle, should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of adsorbent of removal arsenic in waste water acid ion, which is characterized in that include the following steps：Magnesium iron binary hydrotalcite
It is prepared using the method for co-precipitation；Mass ratio by contained arsenate anion in adsorbent and waste water is (0.16-8)：1 ratio
Example, which is added in waste water solution, magnetic agitation, and reaction stirring 1h, filters out adsorbent at a temperature of 25 DEG C, uses
ICP detects the amount of remaining arsenate anion in waste water.
2. adsorbent according to claim 1, which is characterized in that adsorbent is magnesium iron binary hydrotalcite.
3. the magnesium iron binary hydrotalcite belonging to claim 2, which is characterized in that magnesium iron ratio can be 2:1、3:1 or 4:1.
4. thiocyanate ion according to claim 1, which is characterized in that can measure for arsenic in waste water acid radical anion is dense
Spend ranging from (0.05-0.2) M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810368700.4A CN108479689A (en) | 2018-04-23 | 2018-04-23 | A kind of adsorbent of removal arsenic in waste water acid ion |
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| CN201810368700.4A CN108479689A (en) | 2018-04-23 | 2018-04-23 | A kind of adsorbent of removal arsenic in waste water acid ion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252239A (en) * | 2019-05-15 | 2019-09-20 | 浙江工业大学 | A kind of efficient method for controlling Organic- arsenic pollution in water |
| CN110479203A (en) * | 2019-08-19 | 2019-11-22 | 中北大学 | A kind of glycine MODIFIED Fe Mg-LDH and its preparation and application |
| CN111186971A (en) * | 2020-01-08 | 2020-05-22 | 上海海洋大学 | Recoverable bottom mud covering device and application |
| CN114588876A (en) * | 2022-01-18 | 2022-06-07 | 中国科学院武汉岩土力学研究所 | Arsenic adsorption material and preparation and recycling method thereof |
| CN114887582A (en) * | 2022-05-12 | 2022-08-12 | 重庆文理学院 | Method for recovering phosphite ions in wastewater |
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| CN104801527A (en) * | 2014-01-23 | 2015-07-29 | 江苏佳源铝业有限公司 | Method for treating arsenic contaminants by using material containing calcium and aluminum |
| CN105268276A (en) * | 2014-07-03 | 2016-01-27 | 中国石油化工股份有限公司 | Sulfur or arsenic adsorption method |
| CN106943984A (en) * | 2017-04-10 | 2017-07-14 | 西安工业大学 | A kind of arsenic-removing adsorption agent and preparation method thereof |
| CN107252674A (en) * | 2017-07-21 | 2017-10-17 | 中国环境科学研究院 | A kind of dephosphorization agent based on ferronickel binary hydrotalcite |
| CN107376848A (en) * | 2017-07-21 | 2017-11-24 | 中国环境科学研究院 | A kind of o-chloraniline adsorbent and preparation method |
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| CN1830822A (en) * | 2006-03-21 | 2006-09-13 | 吉林大学 | Material for purication anion polluted water |
| CN1962046A (en) * | 2006-10-20 | 2007-05-16 | 山东大学 | A heavy metal ion absorbent and application thereof in removal of heavy metal ion |
| CN104801527A (en) * | 2014-01-23 | 2015-07-29 | 江苏佳源铝业有限公司 | Method for treating arsenic contaminants by using material containing calcium and aluminum |
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| CN106943984A (en) * | 2017-04-10 | 2017-07-14 | 西安工业大学 | A kind of arsenic-removing adsorption agent and preparation method thereof |
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| 苏延磊 等，: ""Mg-Fe-LDHs 纳米颗粒的合成及其阴离子交换容量的研究"", 《高等学校化学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252239A (en) * | 2019-05-15 | 2019-09-20 | 浙江工业大学 | A kind of efficient method for controlling Organic- arsenic pollution in water |
| CN110252239B (en) * | 2019-05-15 | 2022-06-17 | 浙江工业大学 | Method for efficiently controlling organic arsine pollution in water |
| CN110479203A (en) * | 2019-08-19 | 2019-11-22 | 中北大学 | A kind of glycine MODIFIED Fe Mg-LDH and its preparation and application |
| CN111186971A (en) * | 2020-01-08 | 2020-05-22 | 上海海洋大学 | Recoverable bottom mud covering device and application |
| CN114588876A (en) * | 2022-01-18 | 2022-06-07 | 中国科学院武汉岩土力学研究所 | Arsenic adsorption material and preparation and recycling method thereof |
| CN114887582A (en) * | 2022-05-12 | 2022-08-12 | 重庆文理学院 | Method for recovering phosphite ions in wastewater |
| CN114887582B (en) * | 2022-05-12 | 2023-08-15 | 重庆文理学院 | Method for recycling phosphite radical ions in wastewater |
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