Influence of environmental factors on reductive bioprecipitation of uranium by sulfate reducing bacteria
文献类型：期刊论文
| 作者 | Yi, Zheng-Ji2,3; Tan, Kai-Xuan1; Tan, Ai-Li1; Yu, Zhen-Xun1; Wang, Shi-Qiang1 |
| 刊名 | International biodeterioration & biodegradation
 |
| 出版日期 | 2007-12-01 |
| 卷号 | 60期号:4页码:258-266 |
| 关键词 | Sulfate reducing bacteria (srb) U (vi) bioreduction process (ubp) Ph Oxyanion Heavy metal |
| ISSN号 | 0964-8305 |
| DOI | 10.1016/j.ibiod.2007.04.001 |
| 通讯作者 | Tan, kai-xuan(nhtkx@126.com) |
| 英文摘要 | Microbial reduction of soluble uranyl [u (vi)] to insoluble uraninite by sulfate reducing bacteria (srb) is a promising remediation strategy for uranium-contaminated groundwater. effects of environmental factors, including ph and coexisting ions, on u (vi) bioreduction processes (ubp) remain unknown. anaerobic batch experiments were performed to evaluate impact on ubp. kinetic investigations with varied ph demonstrated that u (vi) was reduced mostly within 48 h. the bioprecipitation yields depended strongly on ph, increasing from 12.9% to 99.4% at ph 2.0 and 6.0, respectively. sulfate concentration <= 4000mg l(-1) did not affect ubp; however, sulfate concentration >= 5000 mg l(-1) significantly slowed ubp. biogenic h(2)s produced during sulfate reduction was not directly involved in ubp. at 20 mg l(-1) zn or 10 mg l(-1) cu, no ubp inhibition was observed and uraninite was detected in metal sulfide precipitate. however, 25 mg l(-1) zn or 15 mg l(-1) cu stopped ubp completely. cu toxicity mechanism probably differed from zn. the ability to reduce u (vi) was lost permanently with exposure to >= 15 mg l(-1) cu, but not for zn >= 25 mg l(-1). no uraninite could be detected before nitrate removal, suggesting nitrate strongly inhibited ubp, which may possibly be related to denitrification intermediates controlling the solution redox potential. (c) 2007 elsevier ltd. all rights reserved. |
| WOS关键词 | MILL TAILINGS SITE ; DESULFOVIBRIO-VULGARIS ; CONTAMINATED AQUIFER ; U(VI) ; METAL ; BIOREMEDIATION ; GROUNDWATER |
| WOS研究方向 | Biotechnology & Applied Microbiology ; Environmental Sciences & Ecology |
| WOS类目 | Biotechnology & Applied Microbiology ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000251703600009 |
| 出版者 | ELSEVIER SCI LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380296 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Tan, Kai-Xuan |
| 作者单位 | 1.Univ S China, Sch Nucl Resources & Safety Engn, Hengyang 421001, Hunan, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yi, Zheng-Ji,Tan, Kai-Xuan,Tan, Ai-Li,et al. Influence of environmental factors on reductive bioprecipitation of uranium by sulfate reducing bacteria[J]. International biodeterioration & biodegradation,2007,60(4):258-266. |
| APA | Yi, Zheng-Ji,Tan, Kai-Xuan,Tan, Ai-Li,Yu, Zhen-Xun,&Wang, Shi-Qiang.(2007).Influence of environmental factors on reductive bioprecipitation of uranium by sulfate reducing bacteria.International biodeterioration & biodegradation,60(4),258-266. |
| MLA | Yi, Zheng-Ji,et al."Influence of environmental factors on reductive bioprecipitation of uranium by sulfate reducing bacteria".International biodeterioration & biodegradation 60.4(2007):258-266. |
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来源：中国科学院大学
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