硫酸铵-碘化钾-十二烷基二甲基苄基溴化铵体系浮选分离镉(Ⅱ)  

Flotation Separation of Cadmium (Ⅱ) by Ammonium Sulfate-potassium Iodide-dodecyl Dimethyl Benzyl Ammonium Bromide System

作　　者：钟育均[1] 温欣荣[2] 

机构地区：[1]嘉应学院医学院,广东梅州514031 [2]嘉应学院化学与环境学院,广东梅州514015

出　　处：《化学世界》2016年第3期149-152,共4页Chemical World

基　　金：广东省自然科学基金项目(S2012010010978)

摘　　要：建立了硫酸铵-碘化钾-十二烷基二甲基苄基溴化铵体系浮选分离镉(Ⅱ)的新方法,探讨了镉(Ⅱ)与常见离子定量分离的条件。结果表明,控制pH=4.0,利用硫酸铵-碘化钾-十二烷基二甲基苄基溴化铵体系可使Cd^(2+)被定量浮选,而Zn^(2+)、Co^(2+)、Mn^(2+)、Ni^+、A1^(3+)等不被浮选,实现了Cd^(2+)与这些离子的定量分离。方法用于环境水样中微量Cd^(2+)的定量浮选分离,回收率为95.6%~102.3%。A new method for the flotation separation of cadmium（Ⅱ）using ammonium sulfate-potassium iodide-dodecyl dimethyl benzyl ammonium bromide system was established.The conditions for the quantitative separation of cadmium（Ⅱ）from other metal ions were investigated.The results showed that by controlling pH at 4.0,Cd^2＋was floated quantitatively using the ammonium sulfate-potassium iodide-dodecyl dimethyl benzyl ammonium bromide system,while Zn^2＋,Co^2＋,Mn^2＋,Ni^＋ and Al^3＋ could not be floated.The quantitative separation of Cd^2＋ from those metal ions was achieved.The proposed method was successfully applied to the flotation separation and determination of trace Cd^2＋ in various environmental water samples,and the recoveries were 95.6%～102.3%.

关 键 词：镉(Ⅱ) 浮选分离 碘化钾 十二烷基二甲基苄基溴化铵 

分 类 号：O652.62[理学—分析化学]