丙醇-溴化十六烷基三甲胺-硫酸按-水体系萃取分离汞(Ⅱ)  

Separation of Mercury (Ⅱ) with Ammonium Sulphate-Hexadecyl Trimethylammonium Bromide-n-Propanol-Water Extraction System

作　　者：李全民[1] 张丽敏[1] 刘奇[1] 

机构地区：[1]河南师范大学化学系,新乡453002

出　　处：《分析化学》1999年第10期1208-1210,共3页Chinese Journal of Analytical Chemistry

基　　金：河南省科委自然科学基金资助项目;河南省教委自然科学基金资助项目

摘　　要：研究了丙醇-溴化十六烷基三甲胺(CTMAB)-(NH_4)_2SO_4-水体系萃取分离汞的行为及与常见离子分离条件.试验表明:调节pH1.0或3.0,能使Hg(Ⅱ)从Fe^(3+)、Co^(2+)、Ni^(2+)、Zn^(2+)、Mn^(2+)、Cu^(2+)、Al^(3+)等离子混合液中分离出来.A n-propanol-hexadecyl trimethylammonium bromide (CTMAGB)-(NH4)2SO4-H2O extraction system for the separation of Hg2+ , Fe3* ,Co2+ , Ni2+ ,Zn2+ , Mn2+ , Cu2+ and Al3+ in n-propanol andwater phase containing salts was studied. It showed that the extraction mechanism of Hg(Ⅱ) was basedon the association of metal anions (HgBr42-) with protonated n-propanol molecules (as 2C3H7OH2+·HgBr42-), or with CTMAB (as 2CTMAB·HgBr42-). The optimum condition of extraction was found tobe30% (V/V) n-propanol, 0.15 g/10 mL CTMAB, 2.1g/10 mL (NH4)2SO4 at pH 1.0 or 3.0. It isconcluded that this method can be applied to the separation of Hg2+ from Fe3+、Co2+、Ni2+、Zn2+、Mn2+、Cu + and Al + . Non toxic extractor is involved and the extraction efficiency is high.

关 键 词：汞 丙醇 萃取分离 CTMAB 

分 类 号：O614.243[理学—无机化学]