CTMAB萃取Au(CN)-2体系中盐析剂反常效应

Abstract

研究了阳离子表面活性剂萃取剂惰性稀释剂Au(CN)-2体系萃金过程中盐析效应的规律。结果表明盐析剂的加入反而降低了金的萃取率。这说明盐析剂的作用机制与萃合物在负载有机相中的存在状态及结构密切相关。盐析剂的加入降低了水相中水分子的活度，不利于生成有机相中以水分子为桥的CTMA+*H2O*TBP缔合大阳离子萃合物。对传统的溶剂萃取盐析效应提出了一些新的观点。

The abnormal influence of salting-out agent on the Au(CN)-2 solvent extraction by CTMAB was discussed. The results show that the addition of salting-out agent decreases the gold extraction, which means the action mechanism of salting-out agents is closely related with the existence state and structure of the extractive complex in the loading-organic phases. The addition of salting-out agent decreases the activity of H2O in the aqueous phases, harms to the formation of CTMA+*H2O*TBP. These results also bring some new ideas into the traditional theories of solvent extraction salting-out effect.