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Selective Adsorption and Reusability for Pb<SUP>2+</SUP> of Chitosan-based Microporous Polymer
Jie Yu,Jidong Zheng,Quanfang Lu,Xing Wang,Xiaomin Zhang,Qizhao Wang,Wu Yang 한국고분자학회 2017 폴리머 Vol.41 No.3
A green and simple glow-discharge electrolysis plasma (GDEP) technique was used to synthesize the chitosan/attapulgite/poly(acrylic acid-co-2-acrylamido-2-methyl-1-propanesulfonic acid) (CS/ATP/P(AA-co-AMPS)) microporous polymer. The results showed that the optimum pH for the adsorption of Pb<SUP>2+</SUP>, Cd<SUP>2+</SUP>, Co<SUP>2+</SUP>, and Cu<SUP>2+</SUP> is 4.8, and time of adsorption equilibrium is 60 min. Adsorption kinetics fits well to the pseudo-second-order model. The maximum adsorption capacities for Pb<SUP>2+</SUP>, Cd<SUP>2+</SUP>, Cu<SUP>2+</SUP> and Co<SUP>2+</SUP> are 500.0, 301.7, 180.0 and 151.7 mg g<SUP>-1</SUP>, respectively. The microporous polymer has higher adsorption selectivity toward Pb<SUP>2+</SUP> with the coexistence of Cd<SUP>2+</SUP>, Co<SUP>2+</SUP>, and Cu<SUP>2+</SUP>. The CS/ATP/P(AAco-AMPS) possesses promising regeneration and reusability using 2.0 g L–1 ethylenediamine tetraacetic acid tetrasodium salt (EDTA-4Na) solution as eluent. CS/ATP/P(AA-co-AMPS) can be used as a very promising absorbent for the separation purification and selective recovery of Pb<SUP>2+</SUP> in aqueous solution containing Cd<SUP>2+</SUP>, Co<SUP>2+</SUP>, and Cu<SUP>2+</SUP> ions.
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