Organic-inorganic composite heavy metal ion catching agent

A heavy metal scavenger, heavy metal ion technology, applied in water/sludge/sewage treatment, water pollutants, adsorbed water/sewage treatment, etc., can solve the problems of troublesome production and operation, single modification method, etc., and achieve fast settling speed , the effect of saving land and strong chelating ability

Inactive Publication Date: 2019-12-10
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A lot of preparation methods about modified starch, modified chitosan, modified montmorillonite and other natural polymer modified heavy metal scavenger have been reported at home and abroad, but most of the modification methods are relatively single, and there are certain limitations in application. limitation
Moreover, heavy metal wastewater has a certain degree of turbidity. In the process of water treatment, flocculation and turbidity removal and heavy metal removal should be divided into two treatment units, and the production and operation are more troublesome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The organic-inorganic composite heavy metal scavenger of the present embodiment is 200g chitosan modified polyacrylamide, 250g organic activated montmorillonite, 100g sodium alginate, 80g sodium tripolyphosphate, 50g citric acid, 100g ethylenediamine After mixing succinic acid, 150g EDTA and 20g NaOH evenly, microwave heating at 60°C for 2h, cooling, grinding and pulverizing to 60 mesh.

[0017] The preparation method of above-mentioned chitosan modified polyacrylamide is: add 420g deionized water, 250g mass concentration to be 50% acrylamide aqueous solution, Stir and dissolve 6g of itaconic acid evenly, then add 30g of chitosan monomer, adjust the pH of the solution to 1-1.5 with acetic acid, add 45g of acryloyloxyethyl dimethyl benzyl chloride with a mass concentration of 80% after the dissolution is complete Ammonium aqueous solution, 10g of dimethylaminoethyl methacrylate, at this time the pH rises to 3.5-3.8, further adjust the pH to 3-3.5 with acetic acid, then a...

Embodiment 2

[0020] The organic-inorganic composite heavy metal scavenger of the present embodiment is 150g chitosan modified polyacrylamide, 300g organic activated montmorillonite, 120g sodium alginate, 150g sodium tripolyphosphate, 80g citric acid, 80g ethylenediamine After mixing succinic acid, 100g EDTA and 20g NaOH evenly, microwave heating at 70°C for 2h, cooling, grinding and pulverizing to 80 mesh. Wherein the preparation method of chitosan-modified polyacrylamide is the same as in Example 1, and the preparation method of organically activated montmorillonite is as follows: 500g of sodium-based montmorillonite is added to 2.5L volume fraction of 15% sulfuric acid aqueous solution, at 85 Perform acidification treatment at ℃ for 2 hours, filter the supernatant, and dry at 80°C to obtain acidified montmorillonite; disperse 400g of acidified montmorillonite in deionized water evenly to obtain a montmorillonite suspension with a mass fraction of 5%; Add 100g of octadecyldimethylbenzyl a...

Embodiment 3

[0022]The organic-inorganic composite heavy metal scavenger of the present embodiment is 150g chitosan modified polyacrylamide, 200g organic activated montmorillonite, 50g sodium alginate, 100g sodium tripolyphosphate, 80g citric acid, 120g ethylenediamine After mixing succinic acid, 200g EDTA and 30g NaOH evenly, microwave heating at 70°C for 3h, cooling, grinding and pulverizing to 50 mesh. Wherein the preparation method of organic activated montmorillonite is the same as Example 2, and the preparation method of chitosan modified polyacrylamide is: add 370g to 250mL three-necked flask with stopper (assemble reflux condenser, stirrer and nitrogen pipe) Ionized water, 300g mass concentration are 50% acrylamide aqueous solution, 6g itaconic acid stirring and dissolving, then add 20g chitosan monomer, adjust solution pH with acetic acid to be 1~1.5, add 50g mass concentration again after dissolving completely 80% aqueous solution of acryloyloxyethyl dimethyl benzyl ammonium chlo...

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PUM

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Abstract

The invention provides an organic-inorganic composite heavy metal ion catching agent. The catching agent is prepared by well mixing 10-25 parts of chitosan modified polyacrylamide in mass, 20-35 partsof organic activated montmorillonite in mass, 5-15 parts of algin in mass, 8-15 parts of sodium tripolyphosphate in mass, 5-10 parts of citric acid in mass, 5-15 parts of ethylenediamine disuccinic acid in mass, 10-20 parts of EDTA in mass and 1-3 parts of NaOH in mas, microwave heating the mixture for 2-4 hours at 60-80 DEG C and then cooling the mixture, and grinding and crushing the mixture to50-100 meshes. According to the catching agent, the characteristics of both organic and inorganic macromolecules are achieved at the same time, the two effects of flocculation and turbidity removal and heavy metal removal can be achieved at the same time, and the advantages of large flocs, high chelating capacity, high removal efficiency, wide application range, safety and environmental protection and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an organic-inorganic composite heavy metal ion scavenger. Background technique [0002] The traditional chemical precipitation method to treat sewage has problems such as low treatment efficiency and large amount of sediment, and it is difficult to meet the ideal discharge requirements. Therefore, how to develop new and efficient chemical treatment agents has always been the focus of people's research. The polymer heavy metal ion treatment agents researched and developed in recent years have brought new vitality to the treatment of heavy metal wastewater by virtue of their strong chelating ability with metal ions. However, synthetic polymer treatment agents are expensive, and have problems such as monomer toxicity and refractory degradation, which limit their application. The natural polymer wastewater treatment agent represented by renewable resource starc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/56C02F1/66C02F101/20
CPCC02F1/281C02F1/56C02F1/66C02F2101/20
Inventor 马凯王国瑞周继柱冯春晖孙松厚庞宏磊金鑫张志平石伟杰
Owner 神美科技有限公司
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