蒋德敏,刘代俊,陈建钧,孔婷婷

• 1:重庆三峡学院环境与化学工程学院
• 2:四川大学化学工程学院

摘要(Abstract)：

为了确定反胶团二壬基萘磺酸萃取水相中Mg~(2+)的过程机理,以二壬基萘磺酸为萃取剂、磺化煤油为稀释剂所组成的反胶团有机相对水中的Mg~(2+)进行了萃取研究。考察了反胶团的皂化率、水相中镁盐阴离子种类等对萃取率的影响,同时考察了萃取温度、水相中pH值对分配比的影响,萃取饱和容量随萃取剂浓度的变化情况以及Mg~(2+)在两相中的分配情况。研究结果显示,反胶团的皂化率、水相中镁盐阴离子种类对萃取过程无明显影响;萃取分配比随萃取温度的升高而增大;在萃取体系中水相pH值低于4时,分配比随pH值的增加而增大,pH值大于4后,分配比变化幅度较小;萃取饱和容量随萃取剂浓度的增加而增大,且与萃取剂浓度呈线性关系。二壬基萘磺酸从水相介质中萃取Mg~(2+)的过程是吸热反应,其萃取过程热效应(?H)为5.135k J/mol。研究表明,反胶团二壬基萘磺酸萃取Mg~(2+)的过程为阳离子交换,这一研究结果为二壬基萘磺酸从冶金废水中萃取回收镁提供了理论基础和借鉴。

关键词(KeyWords)： 反胶团;萃取机理;二壬基萘磺酸;Mg~(2+)

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(21076131);; 重庆市教重科技项目(KJ1710245);; 重庆三重学重青年项目(16QN20)

作者(Author): 蒋德敏,刘代俊,陈建钧,孔婷婷

DOI: 10.16026/j.cnki.iea.2019060518

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