title: A novel and highly efficient system for chalcopyrite bioleaching by mixed strains of Acidithiobacillus.
abstract: An integrated bioleaching system (stable pH-silver ion-chloride ion) was firstly proposed to for improving the efficiency of chalcopyrite bioleaching by mixed strains of Acidithiobacillus. The individual effects of stable pH, silver ion, and chloride ion on bioleaching were respectively studied. The highest copper ion concentrations in each system were 45.8, 50.2, and 45.2 mg/l, respectively, when it was only 28.0 mg/l the blank system. Compared with the individual stable pH, silver or chloride ion systems, the relevance of biological and chemical reactions achieved a better balance in the integrated system (stable pH 1.3, 2.0 mg/l silver ion, and 2.5 g/l chloride ion). Moreover, the highest ferrous and sulfate ion concentrations implied less production of S0 membrane and jarosite precipitation. It was also demonstrated by the highest copper ion concentration 55.5 mg/l. These results all indicated that this system was a novel and believable strategy for effectively operating chalcopyrite bioleaching.
authors.affiliation: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China.
authors.forename: Shoushuai
authors.initials: S
authors.lastname: Feng
authors.forename: Hailin
authors.initials: H
authors.lastname: Yang
authors.forename: Yu
authors.initials: Y
authors.lastname: Xin
authors.forename: Kai
authors.initials: K
authors.lastname: Gao
authors.forename: Jiwei
authors.initials: J
authors.lastname: Yang
authors.forename: Ting
authors.initials: T
authors.lastname: Liu
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Wu
authors.initials: W
authors.lastname: Wang
mesh_terms: D042763:Acidithiobacillus / Q000145:classification* / Q000378:metabolism*; D018920:Coculture Techniques / Q000379:methods*; D003300:Copper / Q000302:isolation & purification / Q000378:metabolism*; D059013:Microbial Consortia / Q000502:physiology*; D008906:Mining / Q000379:methods*; D013045:Species Specificity
chemical_list: C012819:chalcopyrite; D003300:Copper