Surface analysis of sulfur speciation on pyrite bioleached by extreme thermophile Acidianus manzaensis using Raman and XANES spectroscopy

	Surface analysis of sulfur speciation on pyrite bioleached by extreme thermophile Acidianus manzaensis using Raman and XANES spectroscopy
	Xia, JL; Yang, Y; He, H; Zhao, XJ; Liang, CL; Zheng, L; Ma, CY; Zhao, YD; Nie, ZY; Qiu, GZ
刊名	HYDROMETALLURGY
	2010
卷号	100 期号:3-4 页码:#REF!
关键词	Bioleaching Pyrite Acidianus manzaensis Sulfur speciation XANES Raman spectroscopy
通讯作者	Xia, JL (reprint author), Cent S Univ, Sch Minerals Proc & Bioengn, Key Lab Biomet, Changsha 410083, Peoples R China.
英文摘要	Sulfur speciation on the surface of pyrite leached by extreme thermophile Acidianus manzaensis YN-25 was investigated by using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and sulfur K-edge X-ray absorption near edge structure spectroscopy (XANES). SEM micrographs showed leaching products with numerous holes were formed into the surface of leached pyrite. XRD spectra indicated that the leach residues were mainly composed of pyrite and jarosite. The sulfur K-edge XANES indicated that elemental sulfur, thiosulfate and/or thiosulfate-like species and jarosite were formed on the mineral surface. Raman spectroscopy further verified the presence of jarosite. elemental sulfur and thiosulfate. Jarosite formed in pyrite leaching appeared much later than in chalcopyrite leaching by the same strain. Jarosite on the mineral surface may account for the passivation of pyrite oxidation, with the passivation effect of elemental sulfur which is less important. In addition, the thiosulfate detected in this study provided novel evidence for surface-bound thiosulfate involved in the stepwise oxidation of pyrite by the extreme thermophile A. manzaensis. (C) 2009 Elsevier B.V All rights reserved
学科主题	Metallurgy & Metallurgical Engineering
类目[WOS]	Metallurgy & Metallurgical Engineering
收录类别	SCI
WOS记录号	WOS:000274235400007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/226372]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Xia, JL,Yang, Y,He, H,et al. Surface analysis of sulfur speciation on pyrite bioleached by extreme thermophile Acidianus manzaensis using Raman and XANES spectroscopy[J]. HYDROMETALLURGY,2010,100(3-4):#REF!.
APA	Xia, JL.,Yang, Y.,He, H.,Zhao, XJ.,Liang, CL.,...&赵屹东.(2010).Surface analysis of sulfur speciation on pyrite bioleached by extreme thermophile Acidianus manzaensis using Raman and XANES spectroscopy.HYDROMETALLURGY,100(3-4),#REF!.
MLA	Xia, JL,et al."Surface analysis of sulfur speciation on pyrite bioleached by extreme thermophile Acidianus manzaensis using Raman and XANES spectroscopy".HYDROMETALLURGY 100.3-4(2010):#REF!.