氯化钠-碘化钾-甲基紫-水液-固体系浮选分离汞(Ⅱ)的研究  

Study on flotation separation of mercury(Ⅱ) by the liquid-solid system of sodium chloride-potassium iodide-methyl violet-water

作　　者：涂常青[1] 温欣荣[1] 

机构地区：[1]嘉应学院化学系,梅州514015

出　　处：《分析试验室》2006年第5期45-48,共4页Chinese Journal of Analysis Laboratory

基　　金：嘉应学院科学研究基金资助(2005年)

摘　　要：研究了NaCl-KI-甲基紫-水液-固体系浮选分离汞（Ⅱ）的行为及其与常见离子分离的条件. 结果表明, 在0.5～1.0 g NaCl存在下, 当0.1 mol/L KI溶液和1.0×10^-3 mol/L甲基紫（MV）溶液的用量分别为0.5, 0.4 mL时, 体系中形成的不溶于水的KI-MV-Hg三元缔合物可浮于盐水相上形成界面清晰的液-固两相, 从而使Hg（Ⅱ）被定量浮选, 而Cd （Ⅱ）, Co （Ⅱ）, Mn （Ⅱ）, Ni（Ⅱ）, Zn（Ⅱ）, Al（Ⅲ）等在此条件下不被浮选, 实现了Hg（Ⅱ）与这些离子之间的定量分离, 对合成水样中微量汞（Ⅱ）进行的定量分离测定, 结果满意.The flotation separation behaviour of mercury（ Ⅱ） by the liquid-solid system of sodium chloride-potassium iodide-methyl violet-water and the conditions for the separation of mercury（ Ⅱ ） from other metal ions were studied. The results showed that with the amount of 0.5 mL of 0.1 mol/L KI and 0.4 mL of 1.0 × 10^-3 mol/L MV, the ternary association complex of KI-MV-Hg floated above the salt-water and formed liquid-solid phase with clear interface in the presence of 0.5 - 1.0 g NaCl. In this condition Cd^2＋ , Co^2＋ , Mn^2＋ , Ni^2＋ , Zn^2＋ , Al^3＋ could not be floated and Hg^2＋ could be floated quantitatively. The method has been used for the flotation separation of trace of Hg^2＋ in the samples of synthetic water and the results were satisfactory.

关 键 词：汞(Ⅱ) 液-固浮选分离 碘化钾 甲基紫 

分 类 号：O652.6[理学—分析化学]