Heavy metal ion adsorbed film and preparation
A technology of heavy metal ions and adsorption membranes, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of enhanced heavy metal adsorption capacity, complicated preparation process, and complicated preparation process. It achieves the effects of strong adsorption capacity, convenient and quick operation, and good regeneration
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Embodiment 1
[0013] Prepare a heavy metal ion adsorption membrane with a mass ratio of polyvinyl alcohol to polyvinyl amine of 95:5: first weigh 95 grams of polyvinyl alcohol, then weigh 5 grams of polyvinyl amine, add water to make the total mass 2000 grams, dissolve to obtain Mass fraction is 5% homogeneous mixed solution; In above-mentioned mixed solution, adding mass fraction is 20 grams of glutaraldehyde aqueous solution of 5%, cross-linking agent consumption accounts for 1% of polymer gross mass; Add 20 grams of hydrochloric acid wherein , after stirring evenly, put the above solution in a petri dish and dry it at 30-50°C to form a film; the obtained film is fully swollen with deionized water to remove excess acid, and then vacuum-dried to obtain polyvinylamine-functionalized polyvinyl alcohol Heavy metal ion adsorption membrane. The results of the heavy metal adsorption experiment of the film are: the maximum adsorption of Cu per gram of polymer film 2+ 60mg, Pb 2+ 40mg, Cd 2+ 50...
Embodiment 2
[0015] The materials used were polyvinyl alcohol and polyallylamine, and the other conditions were the same as in Example 1 to obtain a polyvinylamine functionalized polyvinyl alcohol heavy metal ion adsorption membrane. The results of the heavy metal adsorption experiment of the film are: the maximum adsorption of Cu per gram of polymer film 2+ 65mg, Pb 2+ 48mg, Cd 2 + 52mg.
Embodiment 3
[0017] The materials used were polyvinyl alcohol and branched polyethyleneimine, and the other conditions were the same as in Example 1 to obtain a branched polyethyleneimine functionalized polyvinyl alcohol heavy metal ion adsorption membrane. The results of the heavy metal adsorption experiment of the film are: the maximum adsorption of Cu per gram of polymer film 2+ 58 mg, Pb 2+ 35mg, Cd 2+ 46mg.
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