摘要
研究了硝酸钾-碘化钾-溴化十六烷基吡啶微晶吸附体系浮选分离铜(Ⅱ)的新方法。考察了各种因素对Cu2+浮选率的影响,确定了浮选分离Cu2+的最佳条件,并讨论了Cu2+的浮选分离机理。结果表明,控制pH 3.0,在1.0g KNO3存在下,Cu2+与I-形成的CuI沉淀可被溴化十六烷基吡啶阳离子(CPB+)与I-形成的微晶物质CPB+·I-定量吸附,且被浮选至盐水相上形成界面清晰的固相,而Zn2+、Ni 2+、Co2+、Mn2+、Fe2+、Al 3+等不被浮选至固相,从而实现了Cu2+与这些离子的定量分离,并据此建立了微晶吸附体系浮选分离铜(Ⅱ)的新方法。方法用于环境水样中微量Cu2+的测定,回收率为95%~101%。
A novel method for the flotation separation of copper(Ⅱ) using microcrystalline adsorption system of potassium nitrate-potassium iodide-cetyl pyrinium bromide was studied.The effects of different factor on the flotation yield of Cu2+have been investigated to select the experimental conditions.The possible flotation separation mechanism of Cu2+was discussed.The results show that by controlling pH 3.0,in the presence of 1.0g KNO3,the CuI precipitation which formed by Cu2+reacted with I-was quantitatively adsorbed on the surface of the microcrystalline matter of(CPB+·I-),which produced by cetyl pyrinium bromide cation(CPB+)and I-,and was floated above the salt-water phase,the liquid-solid phases were formed with clear interface.While Zn2+,Ni 2+,Co2+,Mn2+,Fe2+and Al 3+could not be floated.The quantitatively separation of Cu2+from those metal ions was achieved by flotation.A new method for the flotation separation of trace Cu2+using microcrystalline adsorption system was established.The proposed method has been applied to the flotation separation and determination of trace Cu2+in various environmental water samples,and the recovery was 95%-101%.
出处
《冶金分析》
CAS
CSCD
北大核心
2014年第10期73-77,共5页
Metallurgical Analysis
基金
广东省自然科学基金项目(S2012010010978)
2013年国家级大学生创新训练项目(201310582002)
嘉应学院第十批教育教学改革研究项目(JYJG2013102)
关键词
铜(Ⅱ)
微晶吸附
浮选分离
碘化钾
溴化十六烷基吡啶
copper(Ⅱ)
microcrystalline adsorption
flotation separation
potassium iodide
cetyl pyrini-um bromide
