汞在罗丹明B-NaCl-丙醇水溶液中的绿色析相萃取分离和富集

Green Enrichment and Extraction Separation of Mercury in Rhodamine B-NaCl-n-propanol-Water Solution by Phase Separation

研究了罗丹明B-NaCl-丙醇体系萃取汞的新方法.探讨了罗丹明B的浓度、NaCl的浓度、丙醇的浓度和酸度等对Hg(Ⅱ)萃取的影响,确定了萃取分离Hg(Ⅱ)的最佳条件,并讨论了Hg(Ⅱ)的萃取机理.当溶液中罗丹明B、NaCl和丙醇的浓度分别为0.27g/L、160g/L和30%(V/V)时,Hg(Ⅱ)的萃取率达到98.0%以上,实现了Hg(Ⅱ)与Pb(Ⅱ)、Zn(Ⅱ)、Ir(Ⅳ)、Ni(Ⅱ)、Ag(Ⅰ)、Rh(Ⅲ)、Cu(Ⅱ)、Cr(III)、Mg(Ⅱ)、Fe(Ⅲ)、Al(Ⅲ)和Co(Ⅱ)离子定量分离.

A novel method for the extraction and separation ot Hg（ Ⅱ ） in Rhodamine B-NaCl-n-propanol system was developed. The effects of concentrations of Rhodamine B, NaCl,n-propanoland acidity etc on the extraction of Hg（Ⅱ ） have been investigated.The possible extraction separation mechanism of Hg（ Ⅱ ） was discussed. When the concentrations of Rhodamine B, NaCl and n-propanol in solution were 0.27 g/L, 160 g/L and 30 % （V/V）, respectively, Hg（ Ⅱ ） could be quantitatively separated from Pb（ Ⅱ ）, Zn（ Ⅱ ）, Ir（Ⅳ ）, Ni（ Ⅱ）, Ag（ Ⅰ ）, Rh（ Ⅲ ）, Cu（ Ⅱ ）, Cr（Ⅲ）, Mg（ Ⅱ ）, Fe（ Ⅲ ）, AI（ Ⅲ ） and Co（ Ⅱ ） by extraction,and values of extraction percentage of Hg（ Ⅱ ） were over 98.0%.