Utilizing synergistic effects of bifunctional polymer hydrogel PAM-PAMPS for selective capture of Pb(Ⅱ)from wastewater  

作　　者：Xin Li Xuan Ding Junkun Zhou Hui Shi Zhenxi Dai Jiayi Liu Yongcun Ma Penghui Shao Liming Yang Xubiao Luo 

机构地区：[1]Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,Nanchang Hangkong University,Nanchang 330063,China [2]School of Life Science,Jinggangshan University,Ji’an 343009,China

出　　处：《Chinese Chemical Letters》2024年第7期173-177,共5页中国化学快报（英文版）

基　　金：financially supported by the National Science Fund for Distinguished Young Scholars(No.52125002);the National Science Foundation of China(No.52100043);the National Key Research and Development Program of China(No.2019YFC1907900);the National Science Foundation of Jiangxi Province(No.20224BAB203048)。

摘　　要：The preparation of hydrogel adsorbents with admirable performance for efficient selective remove Pb(Ⅱ)in complex wastewater still remains a great challenge.Herein,a novel bifunctional modified polymer hydrogel PAM-PAMPS was prepared by crosslinking acrylamide(AM)and 2-acrylamido-2-methylpropanesulfonic acid(AMPS).Compared with PEG,PAA and PAMPS,PAM-PAMPS exhibited both the maximum adsorption capacity of Pb(Ⅱ)(541.90 mg/g)and satisfactory selectivity for Pb(Ⅱ)in multiple heavy metal ions coexistence solutions.Various characterizations indicated that–SO3H and–NH2as active sites on PAM-PAMPS occur the synergistic effects of ion-exchange and coordination with Pb(Ⅱ)during the adsorption process,respectively.The adsorption energy Ead(PAM-PAMPS)obtained from density functional theory(DFT)calculations was lower than the other three hydrogels,manifesting that PAMPAMPS formed the most stable complex with Pb(Ⅱ),which further demonstrated that Pb(Ⅱ)preferred to combine with PAM-PAMPS to selective capture of Pb(Ⅱ).The practice utilization of PAM-PAMPS was assessed by wastewater of electroplate containing Pb(Ⅱ).Meanwhile,the removal ratio of PAM-PAMPS was maintained at about 89%after 4 adsorption-desorption cycles.This study establishes a new and effective idea for the design and fabrication of bifunctionalized modified polymer hydrogels.

关 键 词：Synergistic effects BIFUNCTIONAL Polymer hydrogel Selective capture Pb(Ⅱ) 

分 类 号：X703[环境科学与工程—环境工程] TQ427.26[化学工程] TQ424