废印刷线路板微生物浸出液中铜的选择性萃取

对萃取法分离废印刷线路板微生物浸出液中的铜进行了研究。结果表明：选用N902为萃取剂，可很好地选择性萃取浸出液中的铜，在萃取剂浓度为10%，萃取相比为1∶1，萃取搅拌时间为5 min的条件下，铜的萃取率可达99.51%，Cu与Fe的分离系数为2 058；以硫酸溶液为反萃剂对萃取获得的负载有机相进行反萃取，在硫酸溶液浓度为1.8 mol/L，反萃取相比为1∶1，反萃取搅拌时间为5 min的条件下，铜的反萃率可达93.57％。

Selective Extraction of Copper from Microbial Leaching Solution of Waste Printed Circuit Boards

The separation of copper from microbial leaching solution of waste printed circuit boards by extraction was studied.The results showed that: Using N902 as the extraction agent，a copper extraction from leaching solution can be selectively realized.Under the conditions of the 10% extraction agent，extract phase of 1∶1 and extract time of 5 min，the copper extraction rate can be up to 99.51% with Cu and Fe separation factor of 2 058; With sulfuric acid solution as the stripping agent，back-extraction on the loading organic phase is carried out.Under the conditions of the sulfuric acid concentration of 1.8 mol / L，back extraction phase rate of 1∶1，at back-extraction time of 5 min，the back-extraction rate of copper can be up to 93.57%.