分离富集金、铂、钯的碲共沉淀物研究

Study on Te-coprecipitates for separation and preconcentration of gold,platinum,palladium

利用不同酸溶解Au,Pt,Pd的碲共沉淀产物的方法,推断其化学成分;并用X射线衍射(XRD)对沉淀产物的成分进行进一步分析确认,从中研究碲共沉淀分离富集Au,Pt,Pd的机理。研究结果表明,在碲共沉淀中,Au主要以单质的形式,Pt和Pd以碲化物形式与Te一起沉淀,为微量或痕量贵金属的分离富集过程提供了理论依据。

Te-coprecipitates with Au, Pt, d were dissolved in different acid in order to infer its components, and the components were further confirmed by X-ray diffraction (XRD). The mechanism for separation and preconcentration of Au, Pt, Pd by Te-coprecipitation was studied. The results show that Au was precipitated mainly as simple substance, while Pt and Pd were precipitated as telluride respectively when Te coprecipitated with Au, Pt, Pd. The study could provide the theoretical foundation for preconcentration of trace Au, Pt and Pd.