紫色色杆菌代谢产生HCN,可浸出废旧电子线路板(WPCB)中的金.考察了预处理、pH值和处理量等重要因素对金浸出率的影响.结果表明,采用硝酸预处理WPCB可以提高金浸出率,每150 mL菌液中WPCB物料加入量为0.5 g,在pH=10.5条件下浸出8天,WPCB中金的浸出率可达68.14%.
HCN is produced byChromobacterium violaceum in the metabolic process. Thus,Chromo- bacterium violaceumcan leach gold from waste printed circuit boards (WPCB). Several important factors influencing the gold leaching efficiency, including pretreatment, pH and WPCB dosage, were investigated. The results showed that the pretreatment with nitric acid could improve the gold leaching rate. A leaching rate of 68.14% was achieved after 0.5 g of WPCB powder was leached for 8 days in 150 mL solution at pH=10.5.
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