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作 者:李玉玲[1] 司学芝[2] 马彦[3] 翟秋阁[1] 马万山[1]
机构地区:[1]信阳师范学院化学化工学院 [2]河南工业大学化学化工学院 [3]中国人民解放军91287部队
出 处:《冶金分析》2009年第11期69-72,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:研究了四丁基溴化铵-碘化钾体系分离汞(Ⅱ)的行为及汞(Ⅱ)与其他金属离子分离的条件。实验结果表明,在水溶液中,汞(Ⅱ)与四丁基溴化铵和碘化钾形成不溶于水的三元缔合物[HgI4][TBAB]2,此三元缔合物沉淀浮于水相上层形成界面清晰的液-固两相。当四丁基溴化铵和碘化钾的浓度分别为6.0×10-4mol/L和5.0×10-3mol/L,Hg(Ⅱ)可与Rh(Ⅲ),Fe(Ⅱ),Sn(Ⅳ),Cr(Ⅲ),Mn(Ⅱ),Ce(Ⅲ),Al(Ⅲ),Ga(Ⅲ),Co(Ⅱ),V(Ⅴ),W(Ⅵ),Ni(Ⅱ),Zn(Ⅱ)和Mo(Ⅵ)分离。对合成水样中Hg(Ⅱ)进行分离和测定,Hg(Ⅱ)的浮选率在99.3%以上,其他金属离子的浮选率都在2.9%以下。该方法在微量汞的分离和富集分析中有一定的实用价值。The behavior and conditions for the floatation separation of Hg (Ⅱ) from other metal ions were investigated with tetrabutyl ammonium bromide (TBAB)-potassium iodide (KI) in water sys- tem. The results showed that Hg (Ⅱ) reacted with TBAB and KI to form a ternary ion association precipitate [HgI4][TBAB]2 in aqueous solutions. This precipitate floated on the surface of water phase, forming liquid-solid phases with a distinct boundary. When the concentrations of tetrabutyl ammonium bromide and KI were 6.0×10^-4 mol/L and 5.0×10^-3 mol/L respectively, Hg(Ⅱ) could be quanti-tatively separated from Rh(Ⅱ),Fe(Ⅱ),Sn(Ⅳ),Cr(Ⅲ),Mn(Ⅱ),Ce(Ⅲ),Al(Ⅲ),Ga(Ⅲ),Co(Ⅱ),V(V),W(Ⅵ),Ni(Ⅱ),Zn(Ⅱ) and Mo(Ⅵ) by floatation. The floatation rate of Hg(Ⅱ) in synthetic water samples was higher than 99.3%, and that of other metal ions was less than 2.9%. This method was somewhat practical for the separation and enrichment of trace mercury.
分 类 号:X832[环境科学与工程—环境工程]
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