以聚醚型低聚物为流动载体的液膜体系中金（Ⅲ）的迁移特性  

TRANSPORT OF Au(Ⅲ) IN THE LIQUID MEMBRANE CONTAINING OLIGOMER OF POLYETHER AS MOBILE CARRIER

作　　者：徐羽梧[1] 王颖[1] 董世华[1] 

机构地区：[1]武汉大学化学系

出　　处：《武汉大学学报（自然科学版）》1994年第2期79-84,共6页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：本文以聚醚型低聚物ＰＯＡ为流动载体，采用整体型液膜装置，在ＨＡｕＣｌ４（ａｑ．）／１，２－二氯乙烷／硫脲（ａｑ．）体系中研究了金（Ⅲ）的迁移特性．结果表明：金（Ⅲ）的迁移速率和迁移率与原料液中金（Ⅲ）的浓度、膜相中流动载体的浓度、接收相中硫脲浓度以及介质酸度等因素有关．ＰＯＡ载体可分别从Ａｕ（Ⅲ）－Ｐｄ（Ⅱ）－Ｐｔ（Ⅳ）和Ａｕ（Ⅲ）－Ｃｕ（Ⅱ）－Ｋ（Ⅰ）混合液中选择性地迁移金（Ⅲ），而不迁移其它离子．Liquid membrane process is a new technology with high velocity, efficiency, selectivity and energy- saving for the separation of metal ions. In this Paper, a polyether oligomer(POA, Mn = 1600)was synthesized and its transport property as mobile carrierCH2OBu-nfor An(Ⅲ) in a bulk liquid membrane system was studied.It was found that POA is a good carrier for the transport of An(Ⅲ) in the bulk liquid membrane'system: HAuCl4 (aq.)/POA ClCH2CH2 Cl/(NH2)2CS (aq.).The transport rate of An ' ) is dependent on the concentration of An(Ⅲ) in source phase,the concentration of carrier in liquid membrane,the concentration of thiourea in receiving phase and the acidity of media. Only An(Ⅲ) can be transported selectively from An(Ⅲ)-Pd(Ⅱ)-Pt(Ⅳ) and K(Ⅰ)-Cu(Ⅱ)-An(Ⅲ) mixtures.

关 键 词：低聚物 载体 金 迁移 聚醚型 

分 类 号：O614.123[理学—无机化学]