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《Chinese Journal of Environmental Engineering》 2009-05
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Bioleaching of copper from printed circuit boards of waste computer by Thiobacillus ferrooxidans

Yang Tao Xu Zheng Wen Jiankang Yang Limei(National Engineering Laboratory of Biohydrometallurgy,General Research Institute For Nonferrous Metals,Beijing 100088)  
Bioleaching,leaching in the solution containing ferrisulphas and leaching by acid of copper contained in the printed circuit boards(PCB) of waste computers were studied under experimental conditions.The leaching experiments results under different conditions indicate that bioleaching copper was faster than that by ferrisulphas and acid.The bioleaching results at different concentrations of 12,24,40,60,120 g/L show that bioleaching velocity decreased with increasing concentration of PCB powder.While the concentration was exceed 60 g/L,the bioleaching velocity was kept at a low level,so it was suitable to choose 24 g/L as the bioleaching concentration in the experiment.The 24 g/L of powder of PCB was put into four flasks containing 100 mL medium in which the bacteria was cultivated for 0,24,48,72 h.It is found that bioleaching was faster in the 72 h medium,longer cultivated time accelerated the bioleaching process.
【CateGory Index】: X705
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