MTIR对铑的吸附及铑与贱金属分离的研究  

STUDY ON THE SORPMON BEHAVIOR OF MTIR Rh(Ⅲ) AND THE SEPA RATION OF Rh(Ⅲ) WITH COMMON METAL IONS BY USING MTIR

作　　者：陈义镛[1] 顾丽英[1] 康晓辉 王耐冬[1] 

机构地区：[1]杭州大学化学系

出　　处：《离子交换与吸附》1994年第4期345-351,共7页Ion Exchange and Adsorption

基　　金：浙江省自然科学基金

摘　　要：采用Ｎ－甲基－２－硫咪唑树脂（Ｎ－ｍｅｔｈｙｌ－２－ｔｈｉｏ－ｉｍｉｄａｚｏｌｅｒｅｓｉｎ，简称ＭＴＩＲ）对Ｒｈ（Ⅲ）进行吸附性试验．确定树脂吸附的最佳条件，测得Ｒｈ（Ⅲ）的吸附速率ｔ１／２＝８４ｍｉｎ，吸附客量１．３７ｍｍｏｌＲｈ（Ⅲ）／ｇＭＴＩＲ（１４０．５ｍｇＲｈ（Ⅲ）／ｇＭＴＩＲ）．吸附摩尔配位比０．３４［Ｒｈ（Ⅲ）／功能基］，分配系数Ｄ＝２．０５×１０３ｍｌ·ｇ－１．并对Ｒｈ（Ⅲ）与Ｆｅ３＋、Ｃｏ２＋、Ｎｉ２＋、Ｃｕ２＋混合离子进行选择性吸附研究，使Ｒｈ（Ⅲ）与其他贱金属离子分离．对ＭＴＩＲ树脂柱上的Ｒｈ（Ⅲ）进行二次洗脱，在２％硫脲的丙酮溶液与等体积的６ｍｏｌＨＣｌｄｍ－３的盐酸的混合溶液条件下可达定量回收．The sorption behavior of N-methyl-2-thio-imidazole resin (MTIR) for Rh(Ⅲ) was investigated. The optimum sorption condition of MTIR for Rh(Ⅲ), sorption rate t1/2= 84min, sorption capacity1 .37mmol Rh(Ⅲ)/g MTTR[140.5mgRh(Ⅲ)/g MTIR],sorption molar ratio 0.34 Rh(Ⅲ) / functional group, distribution coefficient D=2.05×103ml·g-1 were determined.The sorption selectivity of MTIR for Rh(Ⅲ) in the presence of Rh(Ⅲ) and common metal ions,Fe3+,Co2+,Ni2+,Cu2+, was examined.Rh(Ⅲ) adsorbed on MTIR can be eluted quantitatively by a mixed solution 20% thiourea-acetone: 6 mol HCl dm-3(1: 1 vol.)used as an elute. Rh(Ⅲ) can be separated from the mixture of Rh(Ⅲ) and Fe3+,Co2+,Ni2+,Cu2+by using D72 resin and MTIR.

关 键 词：MTIR 铑 吸附 贱金属 分离 

分 类 号：O614.822[理学—无机化学]