Effect of L-cysteine on bioleaching of Ni-Cu sulphide by A. manzaensis  

作　　者：贺治国 赵健存 梁万洁 胡岳华 邱冠周 

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University [2]Key Laboratory of Biometallurgy of Ministry of Education,Central South University

出　　处：《Journal of Central South University》2011年第2期381-385,共5页中南大学学报（英文版）

基　　金：Projects(50621063, 30400010) supported by the National Natural Science Foundation of China;Project(2010CB630903) supported by the National Basic Research Program of China

摘　　要：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.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.

关 键 词：Acidianus manzaensis L-CYSTEINE Ni-Cu sulfide BIOLEACHING surface charge Zeta potential 

分 类 号：TD952[矿业工程—选矿]