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由于使用氰化物带来的环境问题和对金、银的溶解速度相当慢,因此目前关于贵金属的其它溶浸剂的研究越来越引起人们的关注,其中之一就是硫脲。在有过氧化氢或高铁离子等氧化剂存在时,硫脲经由几个连续的阶段氧化生成多种产物:氰根、硫化氢、硫和硫酸根离子。如
Due to the environmental problems caused by the use of cyanide and the relatively slow dissolution rate of gold and silver, the current research on other leaching agents for precious metals is drawing more and more attention. One of them is thiourea. In the presence of an oxidizing agent such as hydrogen peroxide or ferric ion, thiourea oxidizes to produce a variety of products via several successive stages: cyanide, hydrogen sulfide, sulfur and sulfate ions. Such as