等离子体法改性凹凸棒土吸附多氯联苯研究  

Kinetic and Thermodynamic Study on the Removal of Aqueous Polychlorinated Biphenyl by Plasma Induced Grafting Attapulgite

作　　者：谭立强[1,2] 蒋金龙[1,2] 冯良东[1,2] 胡涛[1,2] 钱运华[1,2] 

机构地区：[1]淮阴工学院生命科学与化学工程学院,江苏淮安223003 [2]江苏省凹土资源利用重点实验室,江苏淮安223003

出　　处：《淮阴工学院学报》2013年第5期1-6,共6页Journal of Huaiyin Institute of Technology

基　　金：江苏省科技型企业技术创新资金项目(BC2011163)

摘　　要：运用低温等离子体改性技术将壳聚糖(CTS)接枝到凹凸棒土(ATP)表面(ATP-g-CTS),并将其应用于含2,3,3'-三氯联苯(2,3,3'-TCB)废水溶液的吸附研究。实验中应用假一级速率方程、假二级速率方程、动力学方程、Langmuir、Freundlich和D-R等动力学及热力学模型对实验数据进行模拟。实验结果表明,假二级速率方程和Langmuir模型能更好地模拟相关实验数据,ATP-g-CTS对2,3,3'-TCB主要是化学吸附,是一个吸热的过程,ATP-g-CTS对多氯联苯是一种较好的吸附剂。In this work,plasma technique was applied to graft chitosan（CS） on attapulgite（ATP） to improve its dispersion property and sorption ability to 2,3,3＇-trichlorobiphenyl. The pseudo-first and second-order rate equations,kinetic equations,Langmuir,Freundlich and D-R models were applied to simulate the sorption kinetics and isotherms. The results indicated that the experiment data were fitted better by the pseudo-second-order and Langmuir model. Chemical sorption mechanism was predominant and the sorption was an endothermic process. ATP-g-CTS is a suitable sorbent for polychlorinated biphenyls in aqueous solutions.

关 键 词：等离子体 凹凸棒土 2 3 3'-三氯联苯 吸附 

分 类 号：TD985[矿业工程—选矿]