醋酸纤维素组合液膜迁移Cd^2＋的研究  

Transport of Cd^(2+) by Cellulose Acetate Hybrid Liquid Membrane

作　　者：刘新芳[1] 张晓宇[2] 何鼎胜[3] 

机构地区：[1]洛阳师范学院化学系,河南洛阳471022 [2]河南科技大学食品与生物工程学院,河南洛阳471003 [3]湖南师范大学化学化工学院,长沙410081

出　　处：《河南师范大学学报（自然科学版）》2008年第2期88-91,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：湖南省教育厅2003年科研基金(2003-231-002JJY2016)

摘　　要：论文用醋酸纤维素膜为固体支撑体,研究了镉离子在三辛胺-仲辛醇-二甲苯组合液膜体系中的迁移.考察了料液相和膜相搅拌速率、料液相H+和Cl-浓度、载体浓度、膜溶剂对镉离子迁移的影响,选择了迁移的最佳条件.迁移10 h后,含100 mg/L镉离子料液迁移率达98.5%,回收率达96.5%.当三辛胺浓度发生变化时,对镉离子传输的动力学过程进行分析,建立了镉离子传输的动力学方程并进行了验证.料液中氯离子浓度发生变化时,动力学方程同样成立.In this article, the transport of cadmium（Cd^2＋） by a Tri-n-octylamine （TNOA）-secondary octyl-alcohol （ROH）-kerosene hybrid liquid membrane（HLM） system with cellulose acetate membranes（CAM）as solid supporting body is studied. The influence of stirring speed in feed and membrane solutions, HCl and Cl^- concentration in feed phase , TNOA concentration and membrane solvent on transport of Cd^2＋ is investigated. The experiments indicate that the transport percentage of Cd^2＋ is 98.5% and the recovery percentage of Cd^2＋ is 96.5% after transport of 10 hours when the concentration of Cd^2＋ is 100 mg/L in feed phase. The dynamics model is performed when the concentration of TNOA varied from 0.05 mol/L to 0.30 mol/ L. In addition, the dynamics model has been proved to be true.

关 键 词：组合液膜 镉离子 动力学 

分 类 号：TQ116.2[化学工程—无机化工]