聚(N-(2-乙氨基))天冬酰胺的合成及其对Pb^(2+)和Cu^(2+)螯合的研究  

Synthesis of Poly(N-(2-ethylamino)asparagine) and Its Application in Pb^(2+)and Cu^(2+) Removal

作　　者：杨萤 马博锐 王芳[1] 马政生[1] Yang Ying;Ma Borui;Wang Fang;Ma Zhengsheng(School of Chemical Engineering,Northwest University,Xi’an,Shaanxi 710069,China)

机构地区：[1]西北大学化工学院,陕西西安710069

出　　处：《化学世界》2022年第1期22-29,共8页Chemical World

基　　金：西安市产学研(No.CXY08007)资助项目。

摘　　要：通过聚琥珀酰亚胺(PSI)与乙二胺的加成反应得到聚(N-(2-乙氨基)天冬酰胺)(PEAA),可以实现在水溶液中与Pb^(2+)和Cu^(2+)螯合,Pb^(2+)的最大螯合量为49.81 mg/g,去除率为92.98%;Cu^(2+)的最大螯合量为19.01 mg/g,去除率为83.62%。通过红外光谱(FT-IR)和X射线光电子能谱(XPS)对Pb(4f)和Cu(2p)的吸附机理进行了表征,结果表明金属离子通过配位键吸附在PEAA的酰胺、氨基和羧基上。通过扫描电子显微镜(SEM)发现,PEAA的表面粗糙,内部圆形孔分布相对均匀,有利于吸附的发生。因此,PEAA可作为去除重金属离子的新型环保螯合剂。Poly(N-(2-ethylamino)asparagine)(PEAA) was obtained by the addition reaction of polysuccinimide(PSI) and ethylenediamine, which can chelate with Pb^(2+)and Cu^(2+)in aqueous solution. The maximum chelating capacities for Pb^(2+)is 49.81 mg/g, and the removal rate is as high as 92.98%;the maximum chelating capacities for Cu^(2+)is 19.01 mg/g, and the removal rate reaches 83.62%. Fourier transform infrared spectroscopy(FT-IR) and X-ray photoelectron spectroscopy(XPS) were used to study the adsorption mechanism for Pb(4f) and Cu(2p), and the results showed that metal ions are chemically adsorbed to the amide, amino and carboxyl groups on PEAA by coordination bond. It is found by scanning electron microscope(SEM) that the surface of PEAA is rough, and the internal circular pore distribution is relatively uniform, which facilitates the occurrence of adsorption. Thus, PEAA can be used as a new environmentally friendly chelating agent to remove heavy metal ions.

关 键 词：聚[N-(2-乙氨基)天冬酰胺] 螯合 Pb^(2+) Cu^(2+) 

分 类 号：O633.221[理学—高分子化学]