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
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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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