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题名:
Evidence of cell surface iron speciation of acidophilic iron-oxidizing microorganisms in indirect bioleaching process
作者: Nie, ZY; Liu, HC; Xia, JL; Yang, Y; Zhen, XJ; Zhang, LJ; Qiu, GZ
刊名: BIOMETALS
出版日期: 2016
卷号: 29, 期号:1, 页码:25—37
关键词: EXTRACELLULAR POLYMERIC SUBSTANCES ; RAY-ABSORPTION-SPECTROSCOPY ; NEAR-EDGE SPECTRA ; ACIDITHIOBACILLUS-FERROOXIDANS ; SULFOBACILLUS-THERMOSULFIDOOXIDANS ; DIFFERENTIAL UTILIZATION ; SULFUR ; CHALCOPYRITE ; MECHANISMS ; BACTERIA
DOI: 10.1007/s10534-015-9893-1
通讯作者: Xia, JL (reprint author), Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China. ; Xia, JL (reprint author), Cent S Univ, Key Lab Biomet, Minist Educ China, Changsha 410083, Hunan, Peoples R China.
文章类型: 期刊文献
英文摘要: While indirect model has been widely accepted in bioleaching, but the evidence of cell surface iron speciation has not been reported. In the present work the iron speciation on the cell surfaces of four typically acidophilic iron-oxidizing microorganism (mesophilic Acidithiobacillus ferrooxidans ATCC 23270, moderately thermophilic Leptospirillum ferriphilum YSK and Sulfobacillus thermosulfidooxidans St, and extremely thermophilic Acidianus manzaensis YN25) grown on different energy substrates (chalcopyrite, pyrite, ferrous sulfate and elemental sulfur (S-0)) were studied in situ firstly by using synchrotron-based micro- X-ray fluorescence analysis and X-ray absorption near-edge structure spectroscopy. Results showed that the cells grown on iron-containing substrates had apparently higher surface iron content than the cells grown on S-0. Both ferrous iron and ferric iron were detected on the cell surface of all tested AIOMs, and the Fe(II)/Fe(III) ratios of the same microorganism were affected by different energy substrates. The iron distribution and bonding state of single cell of A. manzaensis were then studied in situ by scanning transmission soft X-ray microscopy based on dual-energy contrast analysis and stack analysis. Results showed that the iron species distributed evenly on the cell surface and bonded with amino, carboxyl and hydroxyl groups.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000369309400003
ISSN号: 0966-0844
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25719
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Nie, ZY,Liu, HC,Xia, JL,et al. Evidence of cell surface iron speciation of acidophilic iron-oxidizing microorganisms in indirect bioleaching process[J]. BIOMETALS,2016-01-01,29(1):25—37.
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