Cr(VI) uptake mechanism of Bacillus cereus
文献类型：期刊论文
| 作者 | Chen, Z; Huang, ZP; Cheng, YJ; Pan, DM; Pan, XH; Yu, MJ; Pan, ZY; Lin, Z; Guan, X; Wu, ZY;于梅娟 |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2012 |
| 卷号 | 87期号:3页码:211-216 |
| 关键词 | Chromium Reduction Immobilization Valence states Microscopy Bacillus cereus |
| 英文摘要 | In this study, we investigated the Cr(VI) uptake mechanism in an indigenous Cr(VI)-tolerant bacterial strain - Bacillus cereus through batch and microscopic experiments. We found that both the cells and the supernatant collected from B. cereus cultivation could reduce Cr(VI). The valence state analysis revealed the complete transformation from Cr(VI) into Cr(III) by living B. cereus. Further X-ray absorption fine structure and Fourier transform infrared analyses showed that the reduced Cr(111) was coordinated with carboxyl and amido functional groups from either the cells or supernatant. Scanning electron microscopy and atomic force microscopy observation showed that noticeable Cr(III) precipitates were accumulated on bacterial surfaces. However, Cr(111) could also be detected in bacterial inner portions by using transmission electron microscopy thin section analysis coupled with energy dispersive X-ray spectroscopy. Through quantitative analysis of chromium distribution, we determined the binding ratio of Cr(111) in supernatant, cell debris and cytoplasm as 22%, 54% and 24%, respectively. Finally, we further discussed the role of bacterium-origin soluble organic molecules to the remediation of Cr(Vi) pollutants. (C) 2011 Elsevier Ltd. All rights reserved. |
| 学科主题 | Environmental Sciences & Ecology |
| 收录类别 | SCI |
| WOS记录号 | WOS:000302335700001 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/223893]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Chen, Z,Huang, ZP,Cheng, YJ,et al. Cr(VI) uptake mechanism of Bacillus cereus[J]. CHEMOSPHERE,2012,87(3):211-216. |
| APA | Chen, Z.,Huang, ZP.,Cheng, YJ.,Pan, DM.,Pan, XH.,...&吴自玉.(2012).Cr(VI) uptake mechanism of Bacillus cereus.CHEMOSPHERE,87(3),211-216. |
| MLA | Chen, Z,et al."Cr(VI) uptake mechanism of Bacillus cereus".CHEMOSPHERE 87.3(2012):211-216. |
入库方式： OAI收割
来源：高能物理研究所
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