Isolation and characterization of a chromium-resistant bacterium Serratia sp Cr-10 from a chromate-contaminated site | |
Zhang, Kundi; Li, Fuli | |
2011-05-01 | |
发表期刊 | APPLIED MICROBIOLOGY AND BIOTECHNOLOGY |
卷号 | 90期号:3页码:1163-1169 |
摘要 | A novel bacterium, Cr-10, was isolated from a chromium-contaminated site and capable of removing toxic chromium species from solution by reducing hexavalent chromium to an insoluble precipitate. Sequence analysis of 16S rRNA gene of strain Cr-10 showed that it was most closely related to Serratia rubidaea JCM 1240(T) (97.68%). Physiological and chemotaxonomic data also supported that strain Cr-10 was identified as Serratia sp., a genus which was never specially reported chromate-resistant before. Serratia sp., Cr-10 was tolerant to a concentration of 1,500 mg Cr(VI) L-1, which was the highest level reported until now. The optimum pH and temperature for reduction of Cr(VI) by Serratia sp. Cr-10 were found to be 7.0 and 37 A degrees C, respectively. The Cr(VI) reduction was significantly influenced by additional carbon sources, and among them fructose and lactose offered maximum reduction, with a rate of 0.28 and 0.25 mg Cr(VI) L-1 h(-1), respectively. The cell-free extracts and filtrate of the culture were able to reduce Cr(VI) while concentration of total chromium remained stable in the process, indicating that the enzyme-catalyzed mechanism was applied in Cr(VI) reduction by the isolate. Additionally, it was found that there was hardly any chromium on the cell surface of the strain, further supporting that reduction, rather than bioadsorption, plays a major role in the Cr(VI) removal. |
文章类型 | Article |
关键词 | Cr(Vi) Reduction Serratia Sp. Batch Reduction Bioremediation |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
DOI | 10.1007/s00253-011-3120-y |
关键词[WOS] | CELL-FREE-EXTRACT ; PSEUDOMONAS-AERUGINOSA ; HEXAVALENT CHROMIUM ; ESCHERICHIA-COLI ; REDUCTION ; IDENTIFICATION ; GENES ; NOV |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Biotechnology & Applied Microbiology |
WOS类目 | Biotechnology & Applied Microbiology |
WOS记录号 | WOS:000289520000036 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qibebt.ac.cn/handle/337004/6573 |
专题 | 分子微生物工程研究组 |
作者单位 | Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Kundi,Li, Fuli. Isolation and characterization of a chromium-resistant bacterium Serratia sp Cr-10 from a chromate-contaminated site[J]. APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,2011,90(3):1163-1169. |
APA | Zhang, Kundi,&Li, Fuli.(2011).Isolation and characterization of a chromium-resistant bacterium Serratia sp Cr-10 from a chromate-contaminated site.APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,90(3),1163-1169. |
MLA | Zhang, Kundi,et al."Isolation and characterization of a chromium-resistant bacterium Serratia sp Cr-10 from a chromate-contaminated site".APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 90.3(2011):1163-1169. |
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