PEI二硫代氨基甲酸盐交联材料的制备及吸附镉、铜、铅离子  

Preparation of the polyethylenimine dithiocarbamate crosslinked absorbing material and its adsorption of cadmium,copper and lead ions

作　　者：胡绍中 周悦 周立宏[2] 曾庆乐 HU Shaozhong;ZHOU Yue;ZHOU Lihong;ZENG Qingle(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection（Chengdu University of Technology）,Chengdu University of Technology,College of Materials,Chemistry ＆ Chemical Engineering,1#,Dongsanlu,Erxianqiao,Chengdu 610059,China;Chengdu University of Technology,College of Environment and Ecology,Chengdu 610059,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室国家环境保护水土污染协同控制与联合修复重点实验室材料与化学化工学院,成都610059 [2]成都理工大学,成都610059

出　　处：《功能材料》2018年第11期11145-11150,共6页Journal of Functional Materials

基　　金：地质灾害防治与地质环境保护国家重点实验室自主研究课题资助项目(SKLGP2016Z004);成都市科学技术局科技惠民技术研发资助项目(2015-HM01-00362-SF);四川省科技厅国际合作资助项目(2016HH0074)

摘　　要：聚乙烯亚胺(PEI)与戊二醛缩合发生交联,缩合形成的CN(碳氮双键)用硼氢化钠还原,最后再跟二硫化碳反应,形成PEI接枝二硫代氨基甲酸盐的交联高分子重金属离子吸附材料。考察该高分子材料吸附镉(Ⅱ)、铜(Ⅱ)、铅(Ⅱ)重金属离子;对其作用机理进行了初步探究。实验证明,随着pH值和重金属离子的浓度的增加,高分子材料对重金属离子Cd2+、Cu2+、Pb2+的吸附容量均呈现先快速增加然后趋缓的趋势,对镉(Ⅱ)、铜(Ⅱ)、铅(Ⅱ)的吸附容量分别达到205.99,215.02和451.79mg/g。Polyethyleneimine （PEI） was cross-linked by condensation with glutaraldehyde. The resulting C=N double bonds produced during condensation were reduced with sodium borohydride. The resulting polymer with a number of primary secondary amines was grafted with carbon disulfide to form the crosslinked dithiocarbamate polymer, a kind of highly efficient heavy metal ion complexation adsorbent material. The material was used in adsorbing cadmium （Ⅱ）, copper （Ⅱ）, lead （Ⅱ） heavy metal ions. Experiments show that with the increase of the pH value and the concentration of heavy metal ions, the adsorption capacity of heavy metal ions Cd 2＋ , Cu 2＋ , and Pb 2＋ in polymer materials first shows a trend of rapid increase and then slow down. Its absorption capability for cadmium （Ⅱ）, copper （Ⅱ）, lead （Ⅱ） reach 205.99, 215.02 and 451.79 mg/g, respectively. Its mechanism of action was preliminary explored.

关 键 词：聚乙烯亚胺 二硫代氨基甲酸酯 重金属离子 络合吸附 交联高分子 吸附材料 

分 类 号：TB324[一般工业技术—材料科学与工程]