摘要
研究了硫酸铵-碘化钾-十二烷基三甲基氯化铵微晶吸附体系浮选分离镉(Ⅱ)的行为及其与常见离子定量分离的条件。结果表明,在0.5g(NH4)2SO4的存在下,当体系中Cd2+、KI、DTMAC同时存在时,体系中形成的三元缔合物(DTMAC)2(CdI4)沉淀被定量吸附在DTMAC+.I-微晶物质表面而被浮选至盐水相上,Cd2+被定量浮选,Co2+、Ni 2+、Zn2+、Mn2+、Fe3+、Al 3+等离子留在水相中而不被浮选,实现了Cd2+与这些离子的定量分离,据此建立了一种微晶吸附体系浮选分离Cd2+的新方法。通过扫描电镜图片确证了DTMAC+.I-微晶物质的产生,探讨了Cd2+的浮选分离机理。方法成功用于合成水样中Cd2+的定量浮选分离,浮选率为95.4%～105.3%。
The flotation separation behaviour of cadmium（Ⅱ） with microcrystalline adsorption system of ammonium sulfate-potassium iodide-dodecyl trimethyl ammonium chloride and the conditions for the quantitative separation of cadmium？ with other common metal ions were investigated.The results showed that,in presence of 0.5g of（NH4）2SO4,Cd^2＋,KI and DTMAC in system could form ternary complex（DTMAC）2（CdI4）precipitation,which could be quantitatively adsorbed on the surface of DTMAC＋.I-microcrystalline and floated above the salt-water phase.In this process,Cd^2＋was quantitatively floated,while Co^2＋,Ni^ 2＋,Zn^2＋,Mn^2＋,Fe^3＋and Al 3＋remained in water phase,realizing the quantitative separation of Cd^2＋from these ions.Consequently,a flotation separation method of Cd^2＋with microcrystalline adsorption system was established.The generation of DTMAC＋.Imicrocrystalline was proved by scanning electron microscope images.The flotation separation mechanism of Cd^2＋was discussed.The proposed method was successfully applied to the quantitative flotation separation of Cd^2＋in synthetic water samples.The flotation yield was 95.4%-105.3%.
出处
《冶金分析》
CAS
CSCD
北大核心
2013年第6期67-71,共5页
Metallurgical Analysis
基金
广东省自然科学基金项目(S2012010010978)
关键词
镉(Ⅱ)
微晶吸附
浮选分离
碘化钾
十二烷基三甲基氯化铵
cadmium（Ⅱ）
microcrystalline adsorption
flotation separation
potassium iodide
dodecyl trimethyl ammonium chloride
