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According to the properties of bioleaching solutions of printed circuit boards (PCBs), impurities in the leaching solution were removed by solvent extraction with N902 (2-hydroxy-5-nonylbenzaldoxime), then the purified solution was subjected to electrolyse for the production of metallic copper. The influence of equilibration time, extractant concentration, O/A ratios, pH value on copper(II) extraction...
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