The effect of activated carbon on bioleaching of low-grade chalcopyrite ores
The effect of adding activated carbon on the bioleaching of low-grade chalcopyrite ores using mixed acidithiobacillus ferrooxidans and acidithiobacillus thiooxidans was investigated. The results show that the addition of activated carbon greatly accelerated the rate and efficiency of copper dissolution from lowgrade chalcopyrite ores. The solution with the concentration of 3.0 g/L activated carbon is most beneficial to the dissolution of copper. The set-aside time of the mixture of activated carbon and ores can have an impact on the bioleaching of low-grade chalcopyrite ores. A 2-day set-aside time is most favorable to the dissolution of copper. The enhanced dissolution rate and efficiency of copper can be attributed to the galvanic interacfon between activated carbon and chalcopyrite. The addition of activated carbon depressed the dissolution of iron and bacterial oxidation of ferrous ions in solution. The lower redox potentials were more favorable to the copper dissolution than the higher potentials for low-grade chalcopyrite ores in the presence of activated carbon.
W.M.Zhang Z.X.Sun S.F.Gu
East China Institute of Technology, Fuzhou, Jiangxi, China Geological Environmental Monitoring Station of Guangxi Zhuangzu Autonomous Region, Guilin, China
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
687-691
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）