Effect of L-cysteine on bioleaching of Ni-Cu sulphide by A.manzaensis |
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| Authors: | HE Zhi-guo ZHAO Jian-cun LIANG Wan-jie HU Yue-hua QIU Guan-zhou |
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| Affiliation: | (1) Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, People’s Republic of China;(2) Department of Bioengineering, School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, People’s Republic of China;(3) Dongguan institute of Environmental sciences, 523011 Dongguan, People’s Republic of China; |
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| Abstract: | The effect of L-cysteine in different concentrations on the bioleaching of Ni-Cu sulfide was studied with an extremely thermophilic
archaea, Acidianus manzaensis. It is found that adding certain amounts of L-cysteine to the bioleaching system of Ni-Cu sulfide largely enhances the leaching
rate. X-ray diffraction (XRD) patterns show the change of bioleached solid residues and the effect of L-cysteine on the surface
charges of minerals. Zeta potential and IR spectra of mineral surface show that the interaction between L-cysteine and mineral
leads to the formation of metal complex, which is propitious to the bioleaching of Ni-Cu sulfide by Acidianus manzaensis. |
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| Keywords: | Acidianus manzaensis L-cysteine Ni-Cu sulfide bioleaching surface charge Zeta potential |
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