【摘要】 研究了ＶＳ－Ⅱ型阴离子交换纤维分离富集金和银的性能，并用于矿石中金银的预富集，硫脲洗脱，再用原子吸收法进行测定。方法经标准物质验证，测定结果与标准值一致；同时就该纤维对金、银的吸附机理进行了研究。通过红外光谱分析、Ｆｒｅｕｎｄｌｉｃｈ吸附等温式以及对有关选择性系数的计算结果表明，其吸附机理为［ＡｕＣｌ４］－、［ＡｇＣｌ２］－借与Ｈ＋缔合而吸着。更多还原

【Abstract】 The adsorption behaviors of VS-Ⅱ type anion exchange fibre for pre concentration of gold and silver have been studied in detail. Au and Ag adsorbed on the fibre are eluted with thiourea and determined by AAS. The method has been verified by the determination of trace Au and Ag in geological reference material. The results are in good agreement with certified values. The adsorption mechanism of the fibre is also studied by infrared spectroscopy and can be described by Freundlich equation. The experimental results show that - and [AgCl 2] - are adsorbed onto the fibre by association mechanism.更多还原