Hydrometallurgy refinery processes usually produce large quantities of wastewater which are harmful to the environment as the waste water contains appreciable amounts of heavy metals such as Zn( II),Cu( II),Cd( II),Ni( II),Co( II),As( Ⅲ) and Pb( II). At present,the efficiency of selective separation and recovery of heavy metals is a focus of research. The regularities and effects of some common available kinds of extractants in the heavy metal extraction process were summarized. These extractants included o...
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