Bioleaching of chalcopyrite with different crystal phases by Acidianus manzaensis  

Acidianus manzaensis对不同晶体结构黄铜矿浸出的作用（英文）

作　　者：Zhen-yuan NIE Wei-wei ZHANG Hong-chang LIU Hong-rui ZHU Chang-hui ZHAO Duo-rui ZHANG Wei ZHU Chen-yan MA Jin-lan XIA 聂珍媛;张威威;刘红昌;朱泓睿;赵昌会;张多瑞;朱薇;马陈燕;夏金兰(中南大学资源加工与生物工程学院生物冶金教育部重点实验室,长沙410083;中国科学院广州地球化学研究所中国科学院成矿学与矿物学重点实验室,广州510640;湖南工业大学理学院,株洲412000;中国科学院高能物理研究所北京同步辐射装置,北京100049)

机构地区：[1]Key Lab of Biometallurgy of Ministry of Education of China,School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China [2]CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry,Chinese Academy of Sciences, Guangzhou 510640, China [3]College of Science, Hunan University of Technology, Zhuzhou 412000, China [4]Beijing Synchrotron Radiation Facility, Institute of High Energy Physics,Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第3期617-624,共8页中国有色金属学报（英文版）

基　　金：Projects(51774342,51404104) supported by the National Natural Science Foundation of China;Project(2017A030313219) supported by the Natural Science Foundation of Guangdong Province,China;Project(2015JJ3062) supported by Science Foundation for Youths of Hunan Province,China;Projects(2017-BEPC-PT-001052,2016-BEPC-PT-000887) supported by Beijing Synchrotron Radiation Facility Public User Program,China;Project(2016-SSRF-PT-004969) supported by the Open Funds of Shanghai Synchrotron Radiation Facility,China

摘　　要：Bioleaching of chalcopyrite with different crystal structures (α-phase,β-phase and γ-phase) by Acidianus manzaensis was comparatively studied by synchrotron radiation based X-ray diffraction (SR-XRD) and S K-edge X-ray absorption near edge structure (XANES) spectroscopy. The α-phase,β-phase and γ-phase chalcopyrite was prepared by heating original chalcopyrite at 583, 773 and 848 K, respectively. Bioleaching results showed that [Cu^2+] in the leaching solution of α-phase,β-phase,γ-phase and original chalcopyrite after 10 days of bioleaching was 1.27, 1.86, 1.43 and 1.13 g/L, respectively, suggesting that β-phase had a better leaching kinetics than others. SR-XRD and XANES results indicated that jarosite and chalcopyrite were the main components in the leaching residues in all cases, and elemental sulfur formed in the early stage of bioleaching. While for β-phase and γ-phase chalcopyrite during bioleaching, bornite was produced in the initial stage of leaching, and turned into chalcocite on day 6.基于同步辐射X射线衍射(SR-XRD)和硫K边X射线吸收近边结构(XANES)光谱学等技术,比较研究A. manzaensis对不同晶体结构黄铜矿(α相、β相和γ相)的浸出。通过在583、773和848K热处理原始黄铜矿,获得α相、β相和γ相黄铜矿。生物浸出的结果表明,经过10 d的生物浸出,α相、β相、γ相和原始黄铜矿浸出液中[Cu^(2+)]分别为1.27、1.86、1.43和1.13 g/L,表明β相的黄铜矿比其他类型的黄铜矿更容易被A. manzaensis浸出。SR-XRD和XANES的结果表明,这4种类型黄铜矿生物浸出的残渣主要是由黄钾铁矾和黄铜矿组成,单质硫在生物浸出的初期产生。而对于β相和γ相黄铜矿生物浸出过程而言,斑铜矿在浸出的初始阶段产生,并且在第6天转化为辉铜矿。

关 键 词：CHALCOPYRITE crystal structure BIOLEACHING Acidianus manzaensis SR-XRD XANES 

分 类 号：TF811[冶金工程—有色金属冶金]