CN1405094A - Anionic capture agent and its preparation and using method - Google Patents
Anionic capture agent and its preparation and using method Download PDFInfo
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- CN1405094A CN1405094A CN 02145169 CN02145169A CN1405094A CN 1405094 A CN1405094 A CN 1405094A CN 02145169 CN02145169 CN 02145169 CN 02145169 A CN02145169 A CN 02145169A CN 1405094 A CN1405094 A CN 1405094A
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- 125000000129 anionic group Chemical group 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 19
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 239000002351 wastewater Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 14
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 12
- 229960001545 hydrotalcite Drugs 0.000 claims description 12
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 12
- 159000000003 magnesium salts Chemical class 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 159000000013 aluminium salts Chemical class 0.000 claims description 10
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 7
- 230000008025 crystallization Effects 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- 238000000975 co-precipitation Methods 0.000 claims description 5
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 5
- 235000017550 sodium carbonate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical group Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 4
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 235000013877 carbamide Nutrition 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000002352 surface water Substances 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 12
- 235000011121 sodium hydroxide Nutrition 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 7
- 239000005574 MCPA Substances 0.000 description 6
- WHKUVVPPKQRRBV-UHFFFAOYSA-N Trasan Chemical compound CC1=CC(Cl)=CC=C1OCC(O)=O WHKUVVPPKQRRBV-UHFFFAOYSA-N 0.000 description 6
- 230000000274 adsorptive effect Effects 0.000 description 5
- 229940082569 selenite Drugs 0.000 description 5
- -1 selenite radical ion Chemical class 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229940077449 dichromate ion Drugs 0.000 description 4
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 229910003023 Mg-Al Inorganic materials 0.000 description 2
- 229910052599 brucite Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003895 groundwater pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 125000000223 arsonoyl group Chemical group [H][As](*)(*)=O 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- LCPDWSOZIOUXRV-UHFFFAOYSA-N phenoxyacetic acid Chemical class OC(=O)COC1=CC=CC=C1 LCPDWSOZIOUXRV-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses an anionic trapping agent, its preparation and application for treating waste water. Said anionic trapping agent is a bimetal oxide with lamillar structure, so that it can be used for absorbing toxic and harmful anions being in environment by means of its special structure and performance. The effective quantity of said anionic trapping agent is contacted with waste water and the reaction condition can be controlled, the anionic pollutant substances can be removed from the waste water. Said invention is simple in synthesis, does not result in secondary pollution, can be extensively used for treating waste water in metallurgical industry, etc., also can be used for repairing and controlling contaminative soil, surface water and underground water.
Description
Technical field
The present invention relates to a kind of anionic trapping agent and preparation thereof and using method.
Background technology
In China and even all over the world, extensively exist the environmental pollution that the poisonous and harmful negatively charged ion causes.On the one hand, heavy metal and the non-metal kind pollutent bigger to human health risk are negatively charged ion, complex anion or polymerization anionic form, mostly as CrO in environment
4 2-, Cr
2O
7 2-, HAsO
4 2-, SeO
3 2-And the organic compound of electronegative and negative polarity, as existence such as phenoxy acetic acids; On the other hand, the pollution that is caused by negatively charged ion is difficult to be cleaned by operation of nature, because it has very strong transfer ability and persistent hazardness in environment.
Negatively charged ion pollutes the discharge of wastewater that is mainly derived from industries such as metallurgy, printing and dyeing, plating, chemical industry.After these negatively charged ion enter environment,, therefore can enter biosphere and hydrosphere very soon because surface soil, rock and water system settling are very weak to their adsorptive power.Relevant report points out that anionic geochemical behavior is to understand some environmental problem, as the importance of groundwater quality and radioactive dirty water processing, also is the basis of understanding the earth surface material cycle.Negatively charged ion pollutes has become one of emphasis environmental problem of paying close attention in the present whole world.Therefore, objectively press for and a kind ofly can stop anion transport mobile environment-friendly materials, the present invention is exactly preparation and the using method that has proposed a kind of anionic trapping agent at this objective demand.
Summary of the invention
The objective of the invention is provides a kind of anionic trapping agent and preparation thereof and using method at above-mentioned objective demand.
Anionic trapping agent of the present invention is a kind of bimetallic oxide with laminate structure, and its chemical structure of general formula is: M
IIMM
IIINOx, wherein M
IIBe divalent cation, M
IIIBe Tricationic, x=m+3n/2.
Anionic trapping agent of the present invention is to be heated under 400～550 ℃ of temperature by hydrotalcite to obtain in 2～4 hours.
The hydrotalcite that uses in the invention can be the commercial goods or be prepared from according to the following steps:
1) is mixed with the solution that concentration is 0.3M with aluminium salt is soluble in water, in solution, adds 2～4 times of mole numbers, stir, make salts solution A until molten entirely to the magnesium salts of aluminium salt;
2) carbonate that mole number is equated with magnesium salts is soluble in water, is made into the solution that concentration is 0.8M, adds the alkali that mole number is three times in carbonate in solution, stirs until molten entirely, makes alkaline solution B;
3) adopt coprecipitation method that two kinds of solution of above-mentioned A, B are dropwise splashed in the water that violent stirring simultaneously; Perhaps with hydrothermal method with two solution short mix, obtain white suspension;
4) suspension is put into water-bath, under 80 ℃, stir crystallization; Perhaps suspension is placed pressure vessel, crystallization under 120～160 ℃ of conditions;
5) with step 4) products therefrom suction filtration, be washed to neutrality.Put into baking oven,, obtain hydrotalcite 60～80 ℃ of oven dry down;
Above-mentioned aluminium salt can be aluminum chloride, aluminum nitrate, Tai-Ace S 150 and hydrate thereof, said magnesium salts can be magnesium chloride, magnesium nitrate, sal epsom and hydrate thereof, said alkali is sodium hydroxide, potassium hydroxide, ammoniacal liquor or urea etc., and carbonate is yellow soda ash, salt of wormwood or urea etc.
Anionic trapping agent of the present invention is used for processing and contains anionic pollutant waste water, may further comprise the steps:
1) content of anionic pollutant in the analysis waste water calculates various anionic concentration;
2) be 5～50 times anionic trapping agent of anionic pollutant total amount in the pending waste water with consumption, join in the waste water and stirred 0.5～3 hour;
3) select methods such as precipitation, filtration, air supporting for use, bimetallic oxide is separated with waste water.
Advantage of the present invention is:
1. the bimetallic oxide that has laminate structure is as anionic trapping agent, and the anionic process of rebuilding in the absorption environment by interlayer anion exchange, laminate structure is irreversible, can not cause secondary pollution so handle waste water with it;
2. it is simple, with low cost that anionic trapping agent of the present invention prepares synthesis technique;
3. the allotment of anionic trapping agent metering is also very extensive, and is not high, simple and easy to use to operator's technical requirements;
4. the anionic pollutant matter in the removal waste water is effective, and the scope of application is extensive, can be widely used in the discharging pre-treatment of industry waste water such as metallurgy, plating, chemical industry, and be used for preventing and repairing of soil and groundwater pollution.
Embodiment
Anionic trapping agent can effectively be removed the anionic pollutant matter in the trade effluent, it has very strong adsorptive power to the pollutent that is negatively charged ion, the existence of complex anion form, and can active adsorption be that the acid group form exists in the water body Cr, N, P, As, Se and radioelement, in addition, anionic trapping agent can also be adsorbed with organic pollutants, as agricultural chemicals, phenolic compound etc.
The anionic trapping agent that the present invention proposes is a kind of bimetallic oxide with laminate structure, and the synthetic material by the metal oxide of two kinds of different valence state is formed is called for short LDO (Layered Double Oxides).It has the brucite of being similar to (Mg (OH)
2) laminate structure, its predecessor is a hydrotalcite-based compound, also is called as anionic clay.The chemical structure of general formula of hydrotalcite is:
[M
1-x IIM
x III(OH)
2]
X+[A
X/n N-MH
2O] M wherein
IIBe Mg
2+, Zn
2+, Fe
2+, Mn
2+, Co
2+, Ni
2+, Cu
2+, Ca
2+Deng divalent metal; M
IIIBe Al
3+, Fe
3+, Cr
3+, Co
3+, Mn
3+Deng trivalent metal cation; A
N-Be CO
3 2-, Cl
-, NO
3 -, SO
4 2-Deng negatively charged ion; X=0.5～0.17; M
II/ M
III=1～5.
Above structural formula can be regarded as divalent metal in the brucite by trivalent metal cation part alternate product, is the positive charge of balanced structure layer, between structural sheet again filling negatively charged ion, also have water molecules in addition.Hydrotalcite promptly loses interlayer anion and water molecules 400 ℃～550 ℃ following calcinings, obtains corresponding bimetallic oxide (LDO).The general formula of bimetallic oxide is: M
IIMM
IIINOx, wherein x=m+3n/2.Bimetallic oxide after being it and water contacting, has the strong tendency that obtains negatively charged ion and water molecules from solution, with the structure of restoration and reconstruction hydrotalcite to the adsorption mechanism of anionic pollutant.Therefore, bimetallic oxide can exchange by interlayer anion, mechanism such as laminate structure reconstruction adsorbs poisonous and hazardous negatively charged ion in the environment.Can be widely used in the discharging pre-treatment of industry waste water such as metallurgy, plating, chemical industry, and be used for preventing and repairing of soil and groundwater pollution.As a kind of simple, effective, economic environment remediation technology, anionic trapping agent has broad application prospects in environmental protection cause.
The hydrotalcite of preparation anionic trapping agent of the present invention can be the commercial goods or make with coprecipitation method or hydrothermal method that the main raw material of hydrotalcite is magnesium salts, aluminium salt, caustic soda and carbonate.Wherein, magnesium salts and aluminium salt can adopt vitriol, nitrate and hydrochloride and hydrate thereof.The mol ratio of magnesium salts and aluminium salt has considerable influence to the absorption property of product, generally should be controlled at 2: 1 to 4: 1 scopes, and recommendation is 3: 1.When obtain solution A, the dissolving of magnesium salts and aluminium salt order is unimportant.Solution B is formulated by yellow soda ash and caustic soda, wherein yellow soda ash and magnesium salts equimolal, and the mole number of caustic soda is three times of yellow soda ash, the dissolving order of the two is unimportant; Also can replace caustic soda and carbonate with urea.
Coprecipitation method is identical with the solution that hydrothermal method is used, but with two kinds of solution blended modes and crystallization condition difference.Coprecipitation method adopts to instil mixes two kinds of solution, need longer instillation time and crystallization time, but required equipment is simple.The hydrothermal method Production Flow Chart is short, but needs the applying pressure container, and facility investment is bigger.
Need to measure the content of pollutent in the waste water before using, calculate various anionic concentration, with this foundation as definite anionic trapping agent consumption.Join the bimetallic oxide in the waste water, its weight should be five times in the negatively charged ion total amount at least.
Bimetallic oxide carries out generally can finishing in half an hour rapidly to anionic absorption reaction.For making reaction thoroughly, with needing constantly to stir behind its adding waste water, so that anionic trapping agent keeps suspension.After finishing, reaction can select for use methods such as routinely precipitation, filtration, air supporting that bimetallic oxide is separated with waste water.
Further specify the present invention below in conjunction with embodiment.
Embodiment 1: the preparation anionic trapping agent.
1) with 0.225mol Mg (NO
3)
2With 0.075mol Al (NO
3)
3Be dissolved in and be made into Mg (NO in the 250mL water
3)
2And Al (NO
3)
3Salts solution A;
2) with 0.675mol NaOH and 0.225mol Na
2CO
3Be dissolved in and be made into NaOH and Na in the 250mL water
2CO
3Alkaline solution B;
3) saline solution and alkali lye are dropwise splashed into simultaneously in the 100mL distilled water that violent stirring, the dropping time is 4 hours;
4) suspension is put into water-bath, under 80 ℃ of temperature, stirred crystallization 24 hours;
5) with the product suction filtration, be washed to neutrality.
6) 500 ℃ of temperature lower calcinations 3 hours, mill, obtain Mg-Al type bimetallic oxide.
Embodiment 2: with the selenite radical ion in the anionic trapping agent removal waste water.
1) the selenite radical solution that respectively to get one liter of concentration be 1.27cmol/L;
2) respectively add the bimetallic oxide 4g for preparing in the example 1;
3) stir 20 minutes at normal temperatures;
4) leave standstill 12 hours, measure the selenite radical content in the solution.
Through above-mentioned adsorption experiment, find that the selenite radical ionic concn in the solution drops to 0.63cmol/L, adsorbed above 99.9% selenite radical ion by anionic trapping agent.
Embodiment 3: remove the weedicide MCPA in the waste water
1) respectively get one liter of concentration be 80.0mmol/L contain MCPA solution;
2) respectively add the bimetallic oxide 4g for preparing in the example 1;
3) stir 20 minutes at normal temperatures;
4) leave standstill 24 hours, measure the MCPA concentration in the solution.
Through above-mentioned adsorption experiment, find that the MCPA in the solution drops to 6mmol/L, adsorbed above 99.9% MCPA by anionic trapping agent.
Embodiment 4: remove the dichromate ion in the waste water
1) respectively gets the dichromate ion solution that one liter of concentration is respectively 60mmol/L;
2) respectively add the double-metal hydroxide 1g for preparing in the example 1;
3) stir 20 minutes at normal temperatures;
4) leave standstill 10 hours, measure the dichromate ion content in the solution.
Find that through above-mentioned experimental technique Mg-Al type bimetallic oxide is 110mmol/g to the absorption maximum capacity of dichromate ion.
Embodiment 5: repeat the program of example 1, just change change pH values, can obtain pH value adsorptive power between 5.0～10.0 and remain unchanged.
Embodiment 6: repeat the program of example 2, just change change pH values, can obtain pH value adsorptive power between 5.0～7.0 and remain unchanged.
Embodiment 7: repeat the program of example 3, use dissimilar bimetallic oxides instead, can obtain [Mg
3AlCl], [Mg
3AlCO
3] and [Mg
3AlNO
3] the type bimetallic oxide is respectively 1.21,0.50 to the adsorptive capacity of MCPA, 0.008mmol/g.
Claims (6)
1. an anionic trapping agent is characterized in that it is the bimetallic oxide with laminate structure, and its chemical structure of general formula is:
M
IIMM
IIINOx, wherein M
IIBe divalent cation, M
IIIBe Tricationic, x=m+3n/2.
2. the method for preparing the described anionic trapping agent of claim 1 is characterized in that it is to be heated under 400～550 ℃ of temperature by hydrotalcite to make in 2～4 hours.
3. the method for preparing anionic trapping agent according to claim 2 is characterized in that said hydrotalcite is the commercial goods or is prepared from according to the following steps:
1) is mixed with the solution that concentration is 0.3M with aluminium salt is soluble in water, in solution, adds 2～4 times of mole numbers, stir, make salts solution A until molten entirely to the magnesium salts of aluminium salt;
2) carbonate that mole number is equated with magnesium salts is soluble in water, is made into the solution that concentration is 0.8M, adds the alkali that mole number is three times in carbonate in solution, stirs until molten entirely, makes alkaline solution B;
3) adopt coprecipitation method that two kinds of solution of above-mentioned A, B are dropwise splashed in the water that violent stirring simultaneously; Perhaps with hydrothermal method with two solution short mix, obtain white suspension;
4) suspension is put into water-bath, under 80 ℃, stir crystallization; Perhaps suspension is placed pressure vessel, crystallization under 120～160 ℃ of conditions;
5) with step 4) products therefrom suction filtration, be washed to neutrality.Put into baking oven,, obtain hydrotalcite 60～80 ℃ of oven dry down;
4. the method for preparing anionic trapping agent according to claim 3 is characterized in that said aluminium salt is aluminum chloride, aluminum nitrate, Tai-Ace S 150 and hydrate thereof, and magnesium salts is magnesium chloride, magnesium nitrate, sal epsom and hydrate thereof.
5. the method for preparing anionic trapping agent according to claim 3 is characterized in that said alkali is sodium hydroxide, potassium hydroxide, ammoniacal liquor or urea, and carbonate is yellow soda ash, salt of wormwood or urea.
6. the application of anionic trapping agent according to claim 1 is used to handle the waste water that contains anionic pollutant, is 5～50 times anionic trapping agent of anionic pollutant total amount in the pending waste water with consumption, joins in the waste water and stirs 0.5～3 hour; Select methods such as precipitation, filtration, air supporting then for use, bimetallic oxide is separated with waste water.
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|---|---|---|---|
| CN 02145169 CN1405094A (en) | 2002-11-08 | 2002-11-08 | Anionic capture agent and its preparation and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145169 CN1405094A (en) | 2002-11-08 | 2002-11-08 | Anionic capture agent and its preparation and using method |
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| Publication Number | Publication Date |
|---|---|
| CN1405094A true CN1405094A (en) | 2003-03-26 |
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| CN100413591C (en) * | 2005-09-01 | 2008-08-27 | 北京化工大学 | Laminated structure treatment compound and treatment method of of fluorinated water |
| CN102424448A (en) * | 2011-11-01 | 2012-04-25 | 同济大学 | Method for removing perchlorate in water |
| CN102502912A (en) * | 2011-11-03 | 2012-06-20 | 同济大学 | Method for removing halogen family oxysalt from water |
| CN102502913A (en) * | 2011-11-03 | 2012-06-20 | 同济大学 | Method for removing anion pollutants from water |
| CN102530881A (en) * | 2012-01-05 | 2012-07-04 | 河南工业大学 | Simple preparation method for high-purity houghite compound with adjustable interlayer spacing |
| CN103011446A (en) * | 2012-11-28 | 2013-04-03 | 常州大学 | Method for purifying electroplating wastewater and printing and dyeing wastewater simultaneously |
| CN103058411A (en) * | 2012-12-20 | 2013-04-24 | 中国科学院生态环境研究中心 | Method of removing fluorinions in water |
| CN103359804A (en) * | 2013-07-08 | 2013-10-23 | 中国科学院福建物质结构研究所 | Method for removing hexavalent chromium from industrial wastewater |
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