嗜酸氧化亚铁硫杆菌浸取印刷线路板中铜的多点添加策略
Multiple point's addition strategy of leaching copper from wastes printed circuit boards with Acidithiobacillus ferrooxidans
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摘要: 考察了嗜酸氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)对废弃印刷电路板(PCBs)中铜回收的影响.由于PCBs添加时间和浓度显著影响菌体生长及铜浸取率,因而通过多点添加PCBs的策略促进铜浸取并减少对细胞生长的抑制.结果表明,PCBs添加量为18 g/L(4 g/L于48 h,6 g/L于96 h和8 g/L于144 h)时,经过240 h培养,铜浸取率达80%,说明该策略有效和可行.Abstract: The effect of Acidithiobacillus ferrooxidans on copper recovery in wastes printed circuit boards(PCBs) was investigated. PCBs addition times and amounts adversely inhibited bacterial growth and thus lowered copper leaching capacity, therefore multiple point's addition strategy could improve leaching copper and reduce inhibition of cell growth. The results showed that when multiple PCBs additions 18 g/L(4 g/L at 48 h, 6 g/L at 96 h and 8 g/L at 144 h) were developed, copper extraction reached 80% after 240 h cultivation. The suggesting strategy of copper leaching from waste PCBs was feasible and effective.
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