CL-N235萃淋树脂吸附分离金的研究

用原子吸收法研究了在盐酸介质中N235萃淋树脂吸附Au的过程。结果表明,树脂对金的吸附性能很好,每克干树脂Au的吸附量达860mg,饱和树脂与Au摩尔比为1.08,树脂吸附选择性好,共存金属除Bi外吸附率都很低,可用来从大量贱金属中吸附富集Au。吸附焓变化为17.56kJ/(mol.K),红外与拉曼光谱研究表明,树脂吸附Au的形态为AuCl4-1。

Study on the Adsorption and Separation Property and Mechanism of Gold with CL-N235 Extraction Resin

The absorption of gold with CL-N235 extraction resin was studied in hydrochloric acid solution by atomic absorption spectrometry.The results show that gold can be perfectly absorbed by the resin with good selectivity,and the exchange capacity of 1g dry resin is 860 mg Au.the mol ratio between saturated resin and gold was 1.08,except bismuth,other base metals have low absorption ratio,so the resin can be used to concentrate gold from large amount of base metals.The reaction enthalpy was 17.56 kJ/(mol·K).It was shown by the Infra red spectrometry and Raman Instrumentation techniques that gold absorbed in the form of AuCl4-1.