CN106582513A - Composite adsorption material for treatment of heavy metal wastewater and preparation method thereof - Google Patents
Composite adsorption material for treatment of heavy metal wastewater and preparation method thereof Download PDFInfo
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- CN106582513A CN106582513A CN201611201591.4A CN201611201591A CN106582513A CN 106582513 A CN106582513 A CN 106582513A CN 201611201591 A CN201611201591 A CN 201611201591A CN 106582513 A CN106582513 A CN 106582513A
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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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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Abstract
The invention discloses a composite adsorption material for treatment of heavy metal wastewater and a preparation method thereof. The composite adsorption material for treatment of the heavy metal wastewater consists of the following raw materials in parts by weight: 20 to 30 parts of kieselguhr, 15 to 25 parts of shell powder, 10 to 20 parts of zeolite powder, 20 to 40 parts of mesoporous molecular sieve, 40 to 60 parts of ethylenediaminetetraacetic acid metal sodium salt, 70 to 80 parts of zinc chloride and 30 to 50 parts of magnesium chloride. According to the invention, by a combined effect of a porous structure prepared from the kieselguhr, the shell powder, the zeolite powder and the mesoporous molecular sieve, the prepared adsorption material has very high adsorption capacity and reducing capacity, can implement efficient removal on various heavy metal ions, such as lead ions, cadmium ions and chromium ions, in water, and has the advantages of high removal rate and high reaction speed; both zinc ions and magnesium ions are loaded on the adsorption material so as to take a synergistic effect, and thus, the adsorption material is higher in capacity of reducing heavy metals, and can implement deep removal.
Description
Technical field
The present invention relates to technical field of sewage, specifically a kind of composite adsorbing material for heavy metal containing wastewater treatment
And preparation method thereof.
Background technology
Heavy metal can not be degraded by microorganisms, and can be enriched with and cause notable poisonous effect in vivo, be a kind of lasting
Contact scar thing.Such as the serious harm health such as hydrargyrum, cadmium, chromium, lead, arsenic, destroys aquatic ecosystem, makes agricultural and the fishery underproduction
Deng the economic loss for causing is huge, becomes the significant problem that restriction China economy, social development and the people's livelihood improve.For a huge sum of money
Category pollution, such as the multiple water treatment method that people have developed, chemical precipitation method, ferrite process, absorption method, ion exchange, electricity
, all there are some shortcoming and defect in solution, reverse osmosiss, electroosmose process, enhancing ultrafiltration method, bioanalysises etc.：(1) some processing costs
Chelate precipitation, ion exchange in height, such as enhancing ultrafiltration method, electroosmose process, chemical precipitation method etc.；(2) some techniques are multiple
It is miscellaneous, cumbersome, such as ferrite process, enhancing ultrafiltration method；(3) some treatment effects do not reach requirement, such as the traditional chemical sedimentation method；
(4) some bad adaptabilities, such as bioanalysises, electrolysis, ferrite process；(5) some equipment investments are big, such as reverse osmosiss, electroosmose process.
Compare with above-mentioned processing method, absorption method is by the big porous material of specific surface area, such as activated carbon, fine coal
Ash, activated sludge ash, zeolite, biomaterial, manganese oxide, Pericarppium arachidis hypogaeae and Kaolin etc., make heavy metal ion in the surface of solids not
It is enriched with the presence of the molecular attraction or chemical bond force of balance and separates.Due to these adsorbent wide material sources and inexpensive, cause
The extensive attention of field of water treatment, becomes a kind of very promising process for treating heavy-metal waste water.But these adsorbents are universal
There is adsorption capacity low, consumption is big, the problems such as the removal efficiency of heavy metal is not high enough.If at effectively desorption mode
Reason, often produces a large amount of waste residues.
The content of the invention
It is an object of the invention to provide a kind of low cost, preparation are conveniently used for the composite adsorption of heavy metal containing wastewater treatment
Material and preparation method thereof, to solve the problems, such as to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 20-
30 parts, conch meal 15-25 parts, zeolite powder 10-20 parts, mesopore molecular sieve 20-40 parts, ethylenediaminetetraacetic acid metal sodium salt 40-60
Part, zinc chloride 70-80 parts, magnesium chloride 30-50 parts.
As further scheme of the invention：The composite adsorbing material for heavy metal containing wastewater treatment, by following heavy
The raw material composition of amount part：Kieselguhr 22-28 parts, conch meal 18-22 parts, zeolite powder 12-18 parts, mesopore molecular sieve 25-35 parts, second
Ethylenediamine tetraacetic acid (EDTA) metal sodium salt 45-55 parts, zinc chloride 72-78 parts, magnesium chloride 35-45 parts.
As further scheme of the invention：The composite adsorbing material for heavy metal containing wastewater treatment, by following heavy
The raw material composition of amount part：25 parts of kieselguhr, 20 parts of conch meal, 15 parts of zeolite powder, 30 parts of mesopore molecular sieve, ethylenediaminetetraacetic acid gold
50 parts of sodium salt of category, 75 parts of zinc chloride, 40 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment, comprises the following steps that：
(1) each raw material is weighed according to weight portion；
(2) by ethylenediaminetetraacetic acid metal sodium salt according to mass ratio 1-1.5：1 dissolving in deionized water, is configured to second two
Amine tetraacethyl metal sodium salt solution, is then impregnated into mesopore molecular sieve in ethylenediaminetetraacetic acid metal sodium salt solution and impregnates 10-
14h, makes ethylenediaminetetraacetic acid metal sodium salt solution be impregnated into molecular sieve pore passage, and carries out supersound process 3-5h, then evacuation
1-2h is processed, 1-3h is centrifuged under the rotating speed of 2000-4000r/min then, precipitation mixture is taken out, in 50-70 DEG C of temperature
Lower vacuum drying 4-8h, it is stand-by；
(3) product that kieselguhr, conch meal, zeolite powder and step (1) are obtained is carried out protection in noble gases together
Under, 1-3h is fired in 1100-1300 DEG C of quartz tube furnace obtain composite adsorbing material matrix；
(4), after the hydrochloric acid solution immersion 15-20h by above-mentioned matrices of composite material with 2-4mol/L, deionized water is rinsed
To its pH value to 6.0-7.0, aqueous solution is then removed, it is stand-by after being dried；Zinc chloride and magnesium chloride are each configured to into 3-5mol/
The liquor zinci chloridi and magnesium chloride solution of L, it is standby；
(5) composite adsorbing material matrix after drying is immersed in liquor zinci chloridi, in 25-35 DEG C, 180-200r/min
Under conditions of oscillating reactionss, remove reactant liquor after oscillating reactionss 20-24h, obtain adsorb zinc ion composite adsorbing material, then will
The composite adsorbing material of absorption zinc ion is immersed in magnesium chloride solution, is vibrated under conditions of 35-40 DEG C, 210-230r/min
Reaction, removes reactant liquor after oscillating reactionss 20-24h, deionized water is rinsed 3-7 and removes aqueous solution all over rear separation, obtains saturation
The composite adsorbing material of absorption；
(6) sodium borohydride solution of 1-2mol/L with the sodium hydroxide solution of mass fraction 0.1-0.3%, is prepared, by boron
After sodium hydride solution is added in the composite adsorbing material that saturation is adsorbed, the oscillating reactionss under 150-170rm/min, oscillating reactionss
Partial reaction liquid is removed after 10-30min, is then washed again to neutrality, drying is to composite adsorbing material finished product.
As further scheme of the invention：The noble gases are nitrogen or argon.
Compared with prior art, the invention has the beneficial effects as follows：
Collective effect of the present invention by loose structure obtained in kieselguhr, conch meal, zeolite powder and mesopore molecular sieve,
The adsorbing material for preparing has very strong absorbability and reducing power, is capable of achieving contents of many kinds of heavy metal ion such as lead in water body
The efficient removal of ion, cadmium ion and chromium ion, has the advantages that clearance height, reaction rate are fast, by zinc ion and magnesium ion
Load on the adsorbent material, play potentiation, the ability of reducing heavy metal is higher, it is possible to achieve deep removal.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 20
Part, 15 parts of conch meal, 10 parts of zeolite powder, 20 parts of mesopore molecular sieve, 40 parts of ethylenediaminetetraacetic acid metal sodium salt, 70 parts of zinc chloride,
30 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment, comprises the following steps that：
(1) each raw material is weighed according to weight portion；
(2) by ethylenediaminetetraacetic acid metal sodium salt according to mass ratio 1：1 dissolving in deionized water, is configured to ethylenediamine tetraacetic
Acetic acid metal sodium salt solution, is then impregnated into mesopore molecular sieve in ethylenediaminetetraacetic acid metal sodium salt solution and impregnates 10h, make second
Ethylenediamine tetraacetic acid (EDTA) metal sodium salt solution is impregnated into molecular sieve pore passage, and carries out supersound process 3h, then evacuation processes 1h, then
1h is centrifuged under the rotating speed of 2000r/min, is taken out precipitation mixture, 4h is vacuum dried at a temperature of 50 DEG C, it is stand-by；
(3) product that kieselguhr, conch meal, zeolite powder and step (1) are obtained is carried out under the protection of argon together, in
1h is fired in 1100 DEG C of quartz tube furnace and obtains composite adsorbing material matrix；
(4), after the hydrochloric acid solution immersion 15h by above-mentioned matrices of composite material with 2mol/L, deionized water is rinsed to its pH
It is worth to 6.0, then removes aqueous solution, it is stand-by after being dried；The zinc chloride that zinc chloride and magnesium chloride are each configured to 3mol/L is molten
Liquid and magnesium chloride solution, it is standby；
(5) composite adsorbing material matrix after drying is immersed in liquor zinci chloridi, under conditions of 25 DEG C, 180r/min
Oscillating reactionss, remove reactant liquor after oscillating reactionss 20h, obtain adsorbing the composite adsorbing material of zinc ion, then will adsorb zinc ion
Composite adsorbing material be immersed in magnesium chloride solution, the oscillating reactionss under conditions of 35 DEG C, 210r/min, oscillating reactionss 20h
After remove reactant liquor, deionized water is separated after rinsing 3 times and removes aqueous solution, obtains the composite adsorbing material of saturation absorption；
(6) sodium borohydride solution of 1mol/L with the sodium hydroxide solution of mass fraction 0.1%, is prepared, by sodium borohydride
After solution is added in the composite adsorbing material that saturation is adsorbed, the oscillating reactionss under 150rm/min are removed after oscillating reactionss 10min
Partial reaction liquid, is then washed again to neutrality, and drying is to composite adsorbing material finished product.
Embodiment 2
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 25
Part, 20 parts of conch meal, 15 parts of zeolite powder, 30 parts of mesopore molecular sieve, 50 parts of ethylenediaminetetraacetic acid metal sodium salt, 75 parts of zinc chloride,
40 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment, comprises the following steps that：
(1) each raw material is weighed according to weight portion；
(2) by ethylenediaminetetraacetic acid metal sodium salt according to mass ratio 1.2：1 dissolving in deionized water, is configured to ethylenediamine
Tetraacethyl metal sodium salt solution, is then impregnated into mesopore molecular sieve in ethylenediaminetetraacetic acid metal sodium salt solution and impregnates 12h, make
Ethylenediaminetetraacetic acid metal sodium salt solution is impregnated into molecular sieve pore passage, and carries out supersound process 4h, then evacuation processes 1.5h,
Then 2h is centrifuged under the rotating speed of 3000r/min, take out precipitation mixture, 6h is vacuum dried at a temperature of 60 DEG C, it is stand-by；
(3) product that kieselguhr, conch meal, zeolite powder and step (1) are obtained is carried out under the protection of nitrogen together, in
2h is fired in 1200 DEG C of quartz tube furnace and obtains composite adsorbing material matrix；
(4), after the hydrochloric acid solution immersion 18h by above-mentioned matrices of composite material with 3mol/L, deionized water is rinsed to its pH
It is worth to 6.5, then removes aqueous solution, it is stand-by after being dried；The zinc chloride that zinc chloride and magnesium chloride are each configured to 4mol/L is molten
Liquid and magnesium chloride solution, it is standby；
(5) composite adsorbing material matrix after drying is immersed in liquor zinci chloridi, under conditions of 30 DEG C, 190r/min
Oscillating reactionss, remove reactant liquor after oscillating reactionss 22h, obtain adsorbing the composite adsorbing material of zinc ion, then will adsorb zinc ion
Composite adsorbing material be immersed in magnesium chloride solution, the oscillating reactionss under conditions of 38 DEG C, 220r/min, oscillating reactionss 22h
After remove reactant liquor, deionized water is separated after rinsing 5 times and removes aqueous solution, obtains the composite adsorbing material of saturation absorption；
(6) sodium borohydride solution of 1.5mol/L with the sodium hydroxide solution of mass fraction 0.2%, is prepared, by hydroboration
After sodium solution is added in the composite adsorbing material that saturation is adsorbed, the oscillating reactionss under 160rm/min are gone after oscillating reactionss 20min
Except partial reaction liquid, then wash again to neutrality, drying is to composite adsorbing material finished product.
Embodiment 3
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 30
Part, 25 parts of conch meal, 20 parts of zeolite powder, 40 parts of mesopore molecular sieve, 60 parts of ethylenediaminetetraacetic acid metal sodium salt, 80 parts of zinc chloride,
50 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment, comprises the following steps that：
(1) each raw material is weighed according to weight portion；
(2) by ethylenediaminetetraacetic acid metal sodium salt according to mass ratio 1.5：1 dissolving in deionized water, is configured to ethylenediamine
Tetraacethyl metal sodium salt solution, is then impregnated into mesopore molecular sieve in ethylenediaminetetraacetic acid metal sodium salt solution and impregnates 14h, make
Ethylenediaminetetraacetic acid metal sodium salt solution is impregnated into molecular sieve pore passage, and carries out supersound process 5h, then evacuation processes 2h, so
3h is centrifuged under the rotating speed of 4000r/min afterwards, takes out precipitation mixture, 8h is vacuum dried at a temperature of 70 DEG C, it is stand-by；
(3) product that kieselguhr, conch meal, zeolite powder and step (1) are obtained is carried out under the protection of argon together, in
3h is fired in 1300 DEG C of quartz tube furnace and obtains composite adsorbing material matrix；
(4), after the hydrochloric acid solution immersion 20h by above-mentioned matrices of composite material with 4mol/L, deionized water is rinsed to its pH
It is worth to 7.0, then removes aqueous solution, it is stand-by after being dried；The zinc chloride that zinc chloride and magnesium chloride are each configured to 5mol/L is molten
Liquid and magnesium chloride solution, it is standby；
(5) composite adsorbing material matrix after drying is immersed in liquor zinci chloridi, under conditions of 35 DEG C, 200r/min
Oscillating reactionss, remove reactant liquor after oscillating reactionss 24h, obtain adsorbing the composite adsorbing material of zinc ion, then will adsorb zinc ion
Composite adsorbing material be immersed in magnesium chloride solution, the oscillating reactionss under conditions of 40 DEG C, 230r/min, oscillating reactionss 24h
After remove reactant liquor, deionized water is separated after rinsing 7 times and removes aqueous solution, obtains the composite adsorbing material of saturation absorption；
(6) sodium borohydride solution of 2mol/L with the sodium hydroxide solution of mass fraction 0.3%, is prepared, by sodium borohydride
After solution is added in the composite adsorbing material that saturation is adsorbed, the oscillating reactionss under 170rm/min are removed after oscillating reactionss 30min
Partial reaction liquid, is then washed again to neutrality, and drying is to composite adsorbing material finished product.
Embodiment 4
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 22
Part, 18 parts of conch meal, 12 parts of zeolite powder, 25 parts of mesopore molecular sieve, 45 parts of ethylenediaminetetraacetic acid metal sodium salt, 728 parts of zinc chloride,
35 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment is with embodiment 2.
Embodiment 5
A kind of composite adsorbing material for heavy metal containing wastewater treatment, is made up of the raw material of following weight portion：Kieselguhr 28
Part, 22 parts of conch meal, 18 parts of zeolite powder, 35 parts of mesopore molecular sieve, 55 parts of ethylenediaminetetraacetic acid metal sodium salt, 78 parts of zinc chloride,
45 parts of magnesium chloride.
The preparation method of the composite adsorbing material for heavy metal containing wastewater treatment is with embodiment 2.
Comparative example 1
, in addition to without zeolite powder, remaining proportioning is consistent with embodiment 2 with preparation process for comparative example 1.
Comparative example 2
, in addition to without mesopore molecular sieve, remaining proportioning is consistent with embodiment 2 with preparation process for comparative example 2.
Comparative example 3
, in addition to not Containing Zinc Chloride, remaining proportioning is consistent with embodiment 2 with preparation process for comparative example 3.
Comparative example 4
, in addition to not magnesium chloride containing, remaining proportioning is consistent with embodiment 2 with preparation process for comparative example 4.
Embodiment 6
Weigh quality respectively for 0.02g embodiments 1-5 and comparative example 1-4 adsorbing material in conical flask with cover, respectively plus
Enter 2.0 × 10-3The aqueous solution 20mL of the Au (III) of mol/L, Hg (II), Pb (II), Ni (II), Co (II) and Cd (II), is placed in
24h is vibrated in gas bath agitator；Using the concentration of remaining heavy metal ion in Solution by Atomic Absorption Spectrophotometry.With (formula 1)
Adsorbance q (mg/g) of the adsorbing material of embodiment 1-5 and comparative example 1-4 is calculated,
In formula, q is adsorbance (mg/g)；Concentration (the μ g/ of the metal ion before and after Co and Ce respectively absorption in solution
mL)；V is reaction solution volume (L)；W is adsorbent mass (g).
1 adsorbance effect of table compares
As shown in Table 1, the composite adsorbing material that prepared by the inventive method may be selected absorption Au (III), Hg (II), Pb (II)
It is especially pronounced with the effect of many kinds of metal ions such as Co (II), its absorption Au (III) and Hg (II).
Collective effect of the present invention by loose structure obtained in kieselguhr, conch meal, zeolite powder and mesopore molecular sieve,
The adsorbing material for preparing has very strong absorbability and reducing power, is capable of achieving contents of many kinds of heavy metal ion such as lead in water body
The efficient removal of ion, cadmium ion and chromium ion, has the advantages that clearance height, reaction rate are fast, by zinc ion and magnesium ion
Load on the adsorbent material, play potentiation, the ability of reducing heavy metal is higher, it is possible to achieve deep removal.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can be with the premise of without departing from this patent objective
Various changes can be made.
Claims (5)
1. a kind of composite adsorbing material for heavy metal containing wastewater treatment, it is characterised in that be made up of the raw material of following weight portion：
Kieselguhr 20-30 parts, conch meal 15-25 parts, zeolite powder 10-20 parts, mesopore molecular sieve 20-40 parts, ethylenediaminetetraacetic acid metal
Sodium salt 40-60 parts, zinc chloride 70-80 parts, magnesium chloride 30-50 parts.
2. the composite adsorbing material for heavy metal containing wastewater treatment according to claim 1, it is characterised in that by following heavy
The raw material composition of amount part：Kieselguhr 22-28 parts, conch meal 18-22 parts, zeolite powder 12-18 parts, mesopore molecular sieve 25-35 parts, second
Ethylenediamine tetraacetic acid (EDTA) metal sodium salt 45-55 parts, zinc chloride 72-78 parts, magnesium chloride 35-45 parts.
3. the composite adsorbing material for heavy metal containing wastewater treatment according to claim 1, it is characterised in that by following heavy
The raw material composition of amount part：25 parts of kieselguhr, 20 parts of conch meal, 15 parts of zeolite powder, 30 parts of mesopore molecular sieve, ethylenediaminetetraacetic acid gold
50 parts of sodium salt of category, 75 parts of zinc chloride, 40 parts of magnesium chloride.
4. a kind of preparation method of the composite adsorbing material for heavy metal containing wastewater treatment as described in claim 1-3 is arbitrary,
Characterized in that, comprising the following steps that：
(1) each raw material is weighed according to weight portion；
(2) by ethylenediaminetetraacetic acid metal sodium salt according to mass ratio 1-1.5：1 dissolving in deionized water, is configured to ethylenediamine tetraacetic
Acetic acid metal sodium salt solution, is then impregnated into mesopore molecular sieve in ethylenediaminetetraacetic acid metal sodium salt solution and impregnates 10-14h,
Make ethylenediaminetetraacetic acid metal sodium salt solution be impregnated into molecular sieve pore passage, and carry out supersound process 3-5h, then evacuation is processed
1-2h, then under the rotating speed of 2000-4000r/min is centrifuged 1-3h, takes out precipitation mixture, true at a temperature of 50-70 DEG C
Sky is dried 4-8h, stand-by；
(3) product that kieselguhr, conch meal, zeolite powder and step (1) are obtained is carried out under the protection of noble gases together, in
1-3h is fired in 1100-1300 DEG C of quartz tube furnace and obtains composite adsorbing material matrix；
(4), after the hydrochloric acid solution immersion 15-20h by above-mentioned matrices of composite material with 2-4mol/L, deionized water is rinsed to which
Then pH value removes aqueous solution to 6.0-7.0, stand-by after being dried；Zinc chloride and magnesium chloride are each configured to into 3-5mol/L's
Liquor zinci chloridi and magnesium chloride solution, it is standby；
(5) composite adsorbing material matrix after drying is immersed in liquor zinci chloridi, in 25-35 DEG C, the bar of 180-200r/min
Oscillating reactionss under part, remove reactant liquor after oscillating reactionss 20-24h, obtain adsorbing the composite adsorbing material of zinc ion, then will absorption
The composite adsorbing material of zinc ion is immersed in magnesium chloride solution, is vibrated anti-under conditions of 35-40 DEG C, 210-230r/min
Should, reactant liquor is removed after oscillating reactionss 20-24h, deionized water is rinsed 3-7 and removes aqueous solution all over rear separation, obtains saturation suction
Attached composite adsorbing material；
(6) sodium borohydride solution of 1-2mol/L with the sodium hydroxide solution of mass fraction 0.1-0.3%, is prepared, by hydroboration
After sodium solution is added in the composite adsorbing material that saturation is adsorbed, the oscillating reactionss under 150-170rm/min, oscillating reactionss 10-
Partial reaction liquid is removed after 30min, is then washed again to neutrality, drying is to composite adsorbing material finished product.
5. the preparation method of the composite adsorbing material for heavy metal containing wastewater treatment according to claim 4, its feature exist
In the noble gases are nitrogen or argon.
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| CN111569826A (en) * | 2020-05-26 | 2020-08-25 | 河北科技师范学院 | Cr (VI) adsorbent Cu-Al2O3Preparation method of @ diatomite |
| CN112108124A (en) * | 2020-09-26 | 2020-12-22 | 江西师范大学 | Water body iron and manganese efficient adsorbent and optimization method thereof |
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Application publication date: 20170426 |