Abstract:

An emulsion liquid membrane system has been used for transporting the enrichment of thorium. In this liquid membrane system,P291〔di(diisobutylmethyl)phosphoric acid〕and TRPO(trialkylphosphine oxide)are used as synergistic mobile carrier,N205 as surfactant,liquid paraffin as film-strengthening agent,sulphonated kerosene as solvent,and (NH₄)₂CO₃?solution as inner phase agent. The stability of the emulsion liquid membrane and the factors affecting the enrichment efficiency of thorium such as temperature,thorium concentration,pH value of outer phase and Rew,Roi?etc,have been studied. Experimental results show that the efficiency of thorium enrichment may arrive at 99.5%～100.5%.The method has been used for the enrichment determination of trace thorium in water and wastewater with pretty satisfactory results.

Key words: emulsion liquid membrane, transport and enrichment, thorium

摘要：

用P291{二 (二异丁基甲基)磷酸〕、TRPO(三烷基氧膦 )协同流动载体 ,N205为表面活性剂 ,液体石蜡作膜的增强剂 ,磺化煤油作溶剂 ,(NH₄)₂ CO₃作内相试剂的乳状液膜体系 ,迁移富集钍。研究了乳状液膜的稳定性、温度、钍的浓度、外相 pH值、乳水比、油内比等因素对富集钍的影响。实验表明 ,在适宜条件下 ,钍的迁移富集率可达99.5 %~100 .5 %。此法用于富集测定水和废水中的痕量钍 ,结果相当满意。

关键词: 乳状液膜, 迁移富集, 钍

CLC Number: 

• TQ028.8