碘化钾-抗坏血酸-十四烷基三甲基溴化铵体系浮选分离铜(Ⅱ)  

Flotation separation of copper(Ⅱ) using potassium iodide-ascorbic acid-tetradecyl trimethyl ammionium bromide system

作　　者：温欣荣[1] 赖珊霞 崔修远 吴斌斌[1] 焦思权 罗俏芳 丘苑红 

机构地区：[1]嘉应学院化学与环境学院,广东梅州514015

出　　处：《冶金分析》2014年第4期65-69,共5页Metallurgical Analysis

基　　金：广东省自然科学基金项目(S2012010010978);嘉应学院第十批教育教学改革研究项目(JYJG2013102);2013年国家级大学生创新训练项目(201310582002)

摘　　要：研究了碘化钾-抗坏血酸-十四烷基三甲基溴化铵体系浮选分离铜（Ⅱ）的行为，探讨了碘化钾溶液用量、十四烷基三甲基溴化铵（TTMAB）溶液用量、抗坏血酸（Vc）溶液用量和酸度等对Cu2＋浮选率的影响，讨论了Cu2＋的浮选分离机理。结果表明，在最佳条件下，Cu抖被抗坏血酸还原成Cu＋，I-与Cu＋形成的CuI沉淀可被TTMAB浮选至水相上层形成界面清晰的液一固两相，实现了Cu抖与Zn2＋、Co2＋、All3＋、Mn2＋、Ni2＋、Fe2＋等离子的定量分离，据此建立了浮选分离微量铜的新方法。方法用于环境水样中微量Cu2＋的定量浮选分离，回收率为97％～104%。The flotation separation behaviour of copper（Ⅱ） with potassium iodide-ascorbic acid-tetradecyl trimethyl ammionium bromide system was studied. The effects of the dosages of KI, tetradecyl trime- thyl ammionium bromide （TTMAB）, ascorbic acid（Vc） and acidity etc on the flotation yield of Cu2＋ have been investigated. The possible flotation separation mechanism of Cu2＋ was discussed. The re- suits showed that under optimum conditions, Cu2＋ could be reduced to Cu＋ by Vc, the precipitation of CuI, which was formed by Cu＋ reacted with I- , was floated to upper water phase by TTMAB,and the liquid-solid phases were formed with clear interface. The quantitatively separation of Cu2＋ from Zn2＋ ,Co2＋ ,AP＋ ,Mn2＋ ,Ni2＋ ,Fe2＋ was achieved by flotation. Accordingly, a new method for the flo- tation separation of trace Cu2＋ was established. The proposed method has been applied to the flotation separation of trace Cu2＋ in various environmental water samples with the recovery of 97%-104%.

关 键 词：铜(Ⅱ) 浮选分离 碘化钾 十四烷基三甲基溴化铵 抗坏血酸 

分 类 号：TQ028.5[化学工程]