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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; Zheng L(郑雷); Ma CY(马陈燕); Zhao YD(赵屹东)
2010
发表期刊HYDROMETALLURGY
卷号100期号:3-4页码:#REF!
通讯作者Xia, JL (reprint author), Cent S Univ, Sch Minerals Proc & Bioengn, Key Lab Biomet, Changsha 410083, Peoples R China.
文章类型Article
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
关键词Bioleaching Pyrite Acidianus manzaensis Sulfur speciation XANES Raman spectroscopy
学科领域Metallurgy & Metallurgical Engineering
DOI10.1016/j.hydromet.2009.11.001
收录类别SCI
WOS类目Metallurgy & Metallurgical Engineering
WOS记录号WOS:000274235400007
引用统计
被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226372
专题多学科研究中心
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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!.
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