Comparative study of S, Fe and Cu speciation transformation during. chalcopyrite bioleaching by mixed mesophiles and mixed thermophiles

doi:10.1016/j.mineng.2017.01.013

	Comparative study of S, Fe and Cu speciation transformation during. chalcopyrite bioleaching by mixed mesophiles and mixed thermophiles
	Nie, ZY; Liu, LZ; Wang, L; Zhao YD(赵屹东); Zheng L(郑雷); Ma CY(马陈燕); Ma, CY; Zheng, L; Zhao, YD; Liu, HC
刊名	MINERALS ENGINEERING
	2017
卷号	106 页码:22-32
关键词	Bioleaching Mixed culture Chalcopyrite Chemical speciation Intermediates
ISSN号	0892-6875
DOI	10.1016/j.mineng.2017.01.013
文献子类	Article; Proceedings Paper
英文摘要	The bioleaching experiments of chalcopyrite were conducted with mixed mesophilic culture (30 degrees C), moderately thermophilic culture (45 degrees C) and extremely thermophilic culture (65 degrees C), respectively. During bioleaching, the S/Fe/Cu speciation was analyzed by synchrotron radiation (SR) based X-ray diffraction (XRD) and S, Fe and Cu K-edge X-ray absorption near edge structure (XANES) spectroscopy. The results showed that the chalcopyrite dissolution could be significantly promoted by these mixed cultures, and the promotion effects were enhanced with the increase of bioleaching temperature. For all bioleaching tests, the formation of intermediates S, jarosite and secondary minerals (chalcocite, bornite and covellite) was detected, in which the formation of bornite, chalcocite and covellite was just related with redox potential. The formation of bomite could accelerate chalcopyrite dissolution, while the decrease of bioleaching microorganisms could reduce chalcopyrite dissolution. (C) 2017 Elsevier Ltd. All rights reserved.
会议地点	Falmouth, ENGLAND
WOS关键词	EXTRACELLULAR THIOL-GROUPS ; SULFURIC-ACID-SOLUTION ; ACIDITHIOBACILLUS-FERROOXIDANS ; ACIDIANUS-MANZAENSIS ; SULFOBACILLUS-THERMOSULFIDOOXIDANS ; ELECTROCHEMICAL DISSOLUTION ; DIFFERENTIAL UTILIZATION ; HINDERED DISSOLUTION ; SURFACE-LAYERS ; MU-S
会议日期	JUN, 2016
WOS研究方向	Engineering ; Mineralogy ; Mining & Mineral Processing
语种	英语
WOS记录号	WOS:000399518800006
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285194]
专题	高能物理研究所_多学科研究中心高能物理研究所_加速器中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Nie, ZY,Liu, LZ,Wang, L,et al. Comparative study of S, Fe and Cu speciation transformation during. chalcopyrite bioleaching by mixed mesophiles and mixed thermophiles[J]. MINERALS ENGINEERING,2017,106:22-32.
APA	Nie, ZY.,Liu, LZ.,Wang, L.,赵屹东.,郑雷.,...&Xia, JL.(2017).Comparative study of S, Fe and Cu speciation transformation during. chalcopyrite bioleaching by mixed mesophiles and mixed thermophiles.MINERALS ENGINEERING,106,22-32.
MLA	Nie, ZY,et al."Comparative study of S, Fe and Cu speciation transformation during. chalcopyrite bioleaching by mixed mesophiles and mixed thermophiles".MINERALS ENGINEERING 106(2017):22-32.