硫酸铵-碘化钾-罗丹明6G-水体系浮选分离铋(Ⅲ)的研究

Study on floatation separation of bismuth(Ⅲ) by the ammonium sulfate-potassium iodide-rhodamine 6G-water system

研究了硫酸铵-碘化钾-罗丹明60-水体系浮选分离铋（Ⅲ）的行为及其与常见离子分离的条件。在1．0g（NH4）2SO4存在下，当0．1mol／L碘化钾溶液和1．0×10^-3mol／L罗丹明6G（Rh6G）溶液的用量分别为1．2、0．5mL时，KI-Rh6G-Bi三元缔合物浮于盐水相上形成界面清晰的液-固两相，Bi^3＋被定量浮选，而Zn^2＋、Mn^2＋、Ni^2＋、Co^2＋、Cu^2＋、Fe^3＋等在此条件下不被浮选，这样实现了Bi^3＋与这些常见离子之间的定量分离。对合成水样进行了定量浮选分离测定，浮选率为97．4％。105．5％。

The floatation separation behavior of bismuth （Ⅲ） by the ammonium sulfate-potassium iodide-rhodamine 6G-water system and the conditions for separating bismuth （Ⅲ） from other metal ions were studied. The results showed that by means of a solution containing 1.2 mL of 0.1 mol/L KI solution and 0.5 mL of 1.0×10^-3 mol/L rhodamine 6G（Rh6G） ,the ternary association complex of KI-Rh6G-Bi could float above the salt-water and form two phases with a clear interface in the presence of 1.0 g of （NH4）2SO4. Under this condit/on Zn^2＋, Mn^2＋, Ni^2＋, Co^2＋, Cu^2＋ and Fe^3＋ ions could not be floated and Bi^3＋ ions could be floated quantitatively. The method had been used for the floatation separation of Bi^3＋ in a synthetic water sample and the floatation yield was 97.4% - 105.5% .