Fe_(3)O_(4)/MLS复合聚合物吸附树脂的结构及其重金属离子吸附性能  

Structure and Heavy Metal Ion Adsorptions of Fe_(3)O_(4)/MLS Composite Polymer Adsorbents

作　　者：林安鸿 万涛[1,2] 丁毅 郑燕 谢方玲 何松松 王健[1,2] 王泰然 LIN Anhong;WAN Tao;DING Yi;ZHENG Yan;XIE Fangling;HE Songsong;WANG Jian;WANG Tairan(Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions(Chengdu University of Technology),Chengdu 610059,China;College of Materials,Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]矿产资源化学四川省高等学校重点实验室(成都理工大学),四川成都610059 [2]成都理工大学材料与化学化工学院,四川成都610059

出　　处：《塑料工业》2022年第3期44-48,共5页China Plastics Industry

基　　金：四川省科技厅重点研发计划项目(2019YFG0264);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(SKLGP2018Z005);四川省人社厅留学回国人员科技活动项目择优资助优秀类项目(19BZ08-009)。

摘　　要：采用水溶液聚合制备了Fe_(3)O_(4)/硅酸镁锂(MLS)复合聚合物吸附树脂,并对其结构和重金属离子吸附性能进行了研究,磁性纳米材料粒径为15~20 nm。通过硅烷偶联剂和聚乙烯亚胺的表面修饰,磁性纳米粒子的团聚现象明显减弱,比饱和磁化强度略微有所降低。Fe_(3)O_(4)/MLS复合聚合物吸附树脂具有一定的比饱和磁化强度和较好的磁响应性。当硅酸镁锂用量为10%,Fe_(3)O_(4)/MLS复合聚合物吸附树脂Cu ^(2+)、Cd ^(2+)、Pb ^(2+)吸附容量分别达到238、259和466 mg/g。Fe_(3)O_(4)/MLS复合聚合物吸附树脂具有粗糙多孔结构,重金属离子吸附为熵增吸热的自发过程,经过五次循环利用,Fe_(3)O_(4)/MLS复合聚合物吸附树脂Cu ^(2+)、Cd ^(2+)、Pb ^(2+)吸附容量分别为第一次吸附容量的72.8%、73.9%和74.5%。Fe_(3)O_(4)/lithium magnesium silicate(MLS)composite polymer adsorbents were prepared by aqueous solution polymerization,and its structure and adsorption performance of heavy metal ions were studied.The particle size of magnetic nanomaterials was 15~20 nm.By the surface modification ofγ-chloropropyl trimethoxysilane(CPTMO)and polyethyleneimine,the agglomeration of magnetic nanoparticles was obviously weakened,and the saturation magnetization was slightly decreased.Fe_(3)O_(4)/MLS composite polymer adsorbents had certain saturation magnetization and good magnetic response.When the amount of lithium magnesium silicate is 10%,the adsorption capacities of Cu ^(2+),Cd ^(2+) and Pb ^(2+) could reach 238,259 and 466 mg/g,respectively.Fe_(3)O_(4)/MLS composite polymer adsorbents has rough and porous structure,and the adsorption of heavy metal ions is a spontaneous process of entropy increasing and endothermy.After five cycles,the adsorption capacities of Cu ^(2+),Cd ^(2+) and Pb ^(2+)for the Fe_(3)O_(4)/MLS composite polymer adsorbents are 72.8%,73.9%and 74.5%of the first adsorption capacities,respectively.

关 键 词：吸附 树脂 重金属 环境污染 聚合 

分 类 号：TQ028.114[化学工程] O647.131.4[理学—物理化学]