汞(Ⅱ)在罗丹明B-乙醇-硫酸铵体系中的析相萃取分离  

Phase extraction and separation of mercury(Ⅱ) in rhodamine B-ethanol-ammonium sulfate system

作　　者：牛明改[1] 司学芝[2] 马冬冬[1] 马万山[1] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]河南工业大学化学化工学院,河南郑州450052

出　　处：《冶金分析》2016年第3期77-80,共4页Metallurgical Analysis

基　　金：河南省教育厅自然科学研究计划项目(2006150023)

摘　　要：研究了罗丹明B-乙醇-硫酸铵体系析相萃取Hg^(2+)的行为及与一些金属离子分离的条件。结果表明,乙醇的水溶液在硫酸铵的作用下分成醇/水两相,在分相过程中,HgCl_4^(2-)与罗丹明B(RhB)生成的[HgCl_4^(2-)][RhB^+]_2能被乙醇相萃取。当溶液中罗丹明B、乙醇和硫酸铵的浓度分别为0.21mg/mL、30%(V/V)和0.30g/mL时,HgCl_4^(2-)的萃取率达到96.8%以上,Co^(2+)、Cr(Ⅲ)、Ag^+、Mg^(2+)、Ni^(2+)、Al^(3+)、Ti(Ⅱ)、Pb^(2+)、Fe^(3+)、Sn(Ⅱ)和Ru^(3+)基本不被萃取,实现了Hg^(2+)与上述金属离子的分离。The phase extraction and separation behaviors of Hg^(2+) in rhodamine B-ethanol-ammonium sulfate system as well as the separation conditions from some metal ions were discussed.The results showed that the aqueous solution of ethanol could be extracted and separated to ethanol/water phases in presence of ammonium sulfate.During the phase separation process,the[HgCl_4^(2-)][RhB^+]_2 formed by HgCl_4^(2-) and rhodamine B(RhB)could be extracted by the ethanol phase.When the concentration of rhodamine B,ethanol and ammonium sulfate in solution was 0.21mg/mL,30 %(V/V)and 0.30g/mL,respectively,the extraction rate of HgCl_4^(2-) was higher than 96.8%.Meanwhile,other metal ions such as Co^(2+),Cr(Ⅲ),Ag+,Mg^(2+),Ni^(2+),Al^(3+),Ti(Ⅳ),Pb^(2+),Fe^(3+),Sn(Ⅳ) and Ru^(3+)were not extracted,realizing the separation of Hg^(2+) from the metal ions above.

关 键 词：汞(Ⅱ) 罗丹明B 乙醇 硫酸铵 萃取分离 

分 类 号：O658.2[理学—分析化学]