PC-88A为流动载体的支撑液膜中Pt(Ⅳ)的迁移  

Transport of Pt(Ⅳ) through a Supported Liquid Membrane with PC-88A as a Carrier

作　　者：姚秉华[1] 郭攀峰[1] 赵青[1] 

机构地区：[1]西安理工大学应用化学系,陕西西安710048

出　　处：《分析测试学报》2008年第8期848-850,855,共4页Journal of Instrumental Analysis

基　　金：西安市科技攻关项目(GG05074);陕西省教育厅科学研究基金资助项目(06JK215)

摘　　要：研究了以烷基膦酸PC-88A为流动载体的聚偏氟乙烯支撑液膜中Pt(Ⅳ)的传输行为。考察了料液相盐酸浓度、解析相盐酸浓度、载体浓度、SnCl2浓度对Pt(Ⅳ)迁移的影响,获得了Pt(Ⅳ)迁移的最佳实验条件:料液相盐酸浓度为1.0 mol/L、解析相盐酸浓度为6.0 mol/L、载体质量分数为5.0%、SnCl2浓度为0.05mol/L。当料液相Pt(Ⅳ)初始质量浓度为1.0 mg/L时,在最佳实验条件下,Pt(Ⅳ)可在3 h内完全迁移。将本法用于含Pt(Ⅳ)(0.8 mg/L),Cu(Ⅱ)(75.0 mg/L),Zn(Ⅱ)(75.0 mg/L),Co(Ⅱ)(75.0 mg/L)和Ni(Ⅱ)(75.0 mg/L)的模拟试样中Pt(Ⅳ)的分离,取得了满意结果。The transport behavior of Pt （ Ⅳ ） through a supported liquid membrane, polyvinylidene fluoride （ PVDF）, using 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester（PC-88A） as the mobile carrier has been studied. The effects of the concentration of HCl in feed and stripping phases, concentration of PC-88A in membrane, and concentration of SnCl2 in feed phase on the transport process of Pt（Ⅳ） have been studied. It was found that under optimum conditions： 1.0 mol/L HCl in feed phase, 6.0 mol/L HCl in stripping phase, 5.0% carrier concentration, 0. 05 mol/L SnC12, 1.0 mg/L Pt （ Ⅳ ） as initial concentraton, Pt （ Ⅳ ） could be completely transported in 3 h. This method has been used to separate Pt（ Ⅳ ） in the simulated electroplating wastewater from the other elements ： 0.8 mg/LPt（Ⅳ） , 75.0mg/LCu（Ⅱ） , 5.0mg/LZn（Ⅱ） , 75.0mg/L Co（Ⅱ） and 75.0mg/L Ni（ Ⅱ ） with satisfactory result.

关 键 词：液膜分离 支撑液膜 铂 烷基磷酸 PC-88A 

分 类 号：O614.826[理学—无机化学] TQ450.42[理学—化学]