| The precious metal palladium is widely used in industrial production, but the resources are scarce and expensive, so it is particularly important to recover palladium from secondary resources. The waste liquid and wastewater containing palladium produced in industrial activities such as metallurgy, electroplating, PCB manufacturing and nuclear industry are a relatively large secondary resource of palladium. There are great differences in palladium content, composition and other characteristics of waste liquid and wastewater from different sources. Based on the analysis of more than 40 related literatures at home and abroad, the existing technologies for the separation and recovery of palladium from waste liquid and wastewater were summarized in this review, including precipitation/replacement method, extraction method, adsorption method and biological method. The principle, application, advantages and disadvantages of these methods were briefly introduced. The recent research progress of various methods was compared and the future research direction was prospected in order to provide reference for the separation and recovery of palladium from waste liquid and wastewater. |
