Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH
Liu, HC; Xia, JL; Nie, ZY; Ma, CY; Zheng, L; Hong, CH; Zhao, YD; Wen, W; Xia, JL (reprint author), Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.
2016
发表期刊MINERALS ENGINEERING
ISSN0892-6875
卷号98页码:80-89
文章类型期刊论文
摘要The bioleaching of pure chalcopyrite by thermophilic Archaea strain Acidianus manzaensis YN-25 under different constant pH was first comparatively investigated. Then the relevant sulfur speciation was analyzed by synchrotron radiation based X-ray diffraction (SR-XRD) and S K-edge X-ray absorption near edge structure ()CANES) spectroscopy. The acidity of the leaching solution was monitored at 3-h intervals to make it steady at pH 1.25, 1.50, 1.75, 2.00, 2.25 and 2.50, respectively. Leaching results showed that the copper ion extraction increased during chemical leaching but decreased during bioleaching when pH value decreased from 2.50 to 1.25. SR-XRD analysis showed that, during bioleaching, new elemental sulfur (5) phase was detected at all tested pH cases; new jarosite phase was detected at cases of pH 1.50 to 2.50; and jarosite gradually became a major phase when pH value increased. XANES analysis further showed that covellite was detected during bioleaching at cases of pH 1.25 to 2.00 at higher redox potential (ORP) value, while chalcocite and bornite were detected at cases of pH 2.25 and 2.50 at lower ORP value. These results suggested that the formation of S was mainly accounting for hindering the dissolution of chalcopyrite while the formation of bornite could accelerate the dissolution of chalcopyrite by A. manzaensis. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Bioleaching Chalcopyrite Acidianus Manzaensis Constant Ph Synchrotron Radiation Xanes
DOI10.1016/j.mineng.2016.07.019
收录类别SCI
语种英语
WOS记录号WOS:000385603200011
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26441
专题中科院上海应用物理研究所2011-2018年
通讯作者Xia, JL (reprint author), Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.
推荐引用方式
GB/T 7714
Liu, HC,Xia, JL,Nie, ZY,et al. Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH[J]. MINERALS ENGINEERING,2016,98:80-89.
APA Liu, HC.,Xia, JL.,Nie, ZY.,Ma, CY.,Zheng, L.,...&Xia, JL .(2016).Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH.MINERALS ENGINEERING,98,80-89.
MLA Liu, HC,et al."Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH".MINERALS ENGINEERING 98(2016):80-89.
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