Relatedness between catalytic effect of activated carbon and passivation phenomenon during chalcopyrite bioleaching by mixed thermophilic Archaea culture at 65 degrees C
Ma, YL; Liu, HC; Xia, JL; Nie, ZY; Zhu, HR; Zhao, YD; Ma, CY; Zheng, L; Hong, CH; Wen, W
2017
发表期刊TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
卷号27期号:6页码:1374-1384
文章类型期刊论文
摘要The relatedness between catalytic effect of activated carbon and passivation phenomenon during chalcopyrite bioleaching by mixed thermophilic Archaea culture (Acidianus brierleyi, Metallosphaera sedula, Acidianus manzaensis and Sulfolobus metallicus) at 65 degrees C was studied. Leaching experiments showed that the addition of activated carbon could significantly promote the dissolution of chalcopyrite for both bioleaching and chemical leaching. The results of synchrotron-based X-ray diffraction, iron L-edge and sulfur K-edge X-ray absorption near edge structure spectroscopy indicated that activated carbon could change the transition path of electrons through galvanic interactions to form more readily dissolved secondary mineral chalcocite at a low redox potential (<400 mV) and then enhanced the copper dissolution. Jarosite accumulated immediately in the initial stage of bioleaching with activated carbon but copper dissolution was not hindered. However, much jarosite precipitated on the surface of chalcopyrite in the late stage of bioleaching, which might account for the decrease of copper dissolution rate. More elemental sulfur (S-0) was also detected with additional activated carbon but the mixed thermophilic Archaea culture had a great sulfur oxidation activity, thus S-0 was eliminated and seemed to have no significant influence on the dissolution of chalcopyrite.
关键词K-edge Xanes Acidithiobacillus-ferrooxidans Acidianus-manzaensis Sulfur Speciation Concentrate Spectroscopy Copper
DOI10.1016/S1003-6326(17)60158-4
关键词[WOS]K-EDGE XANES ; ACIDITHIOBACILLUS-FERROOXIDANS ; ACIDIANUS-MANZAENSIS ; SULFUR SPECIATION ; CONCENTRATE ; SPECTROSCOPY ; COPPER
收录类别SCI
语种英语
WOS记录号WOS:000406388300017
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28799
专题中科院上海应用物理研究所2011-2018年
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Ma, YL,Liu, HC,Xia, JL,et al. Relatedness between catalytic effect of activated carbon and passivation phenomenon during chalcopyrite bioleaching by mixed thermophilic Archaea culture at 65 degrees C[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2017,27(6):1374-1384.
APA Ma, YL.,Liu, HC.,Xia, JL.,Nie, ZY.,Zhu, HR.,...&Wen, W.(2017).Relatedness between catalytic effect of activated carbon and passivation phenomenon during chalcopyrite bioleaching by mixed thermophilic Archaea culture at 65 degrees C.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,27(6),1374-1384.
MLA Ma, YL,et al."Relatedness between catalytic effect of activated carbon and passivation phenomenon during chalcopyrite bioleaching by mixed thermophilic Archaea culture at 65 degrees C".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 27.6(2017):1374-1384.
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