کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582910 | 1453171 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Potential-pH diagram for “Leucobacter sp. Ch-1-Cr-H2O” system
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Potential-pH diagram for “Leucobacter sp. Ch-1-Cr-H2O” system Potential-pH diagram for “Leucobacter sp. Ch-1-Cr-H2O” system](/preview/png/582910.png)
چکیده انگلیسی
Laboratory experiments were used to investigate the effects of initial pH and applied potential on the growth of Leucobacter sp. Ch-1 and Cr (VI) reduction and establish the pH-Eh diagram for Leucobacter sp. Ch-1-Cr-H2O system. The results showed that the preferred initial pH for Leucobacter sp. Ch-1 growth was from 7.0 to 11.0. At this pH range, 56.2-99.5% of Cr (VI) was reduced by Ch-1 strain. The applied potentials from â700 to 0Â mV, from â800 to +300Â mV and from â800 to +400Â mV at 7.0, 9.0 and 11.0 of initial pH values were favorable for the bacterial growth. The corresponding ranges of applied potentials for bio-reduction of Cr (VI) were from â200 to 0Â mV, from â800 to +200Â mV, and from â700 to +100Â mV at above initial pH values. In the potential-pH diagram, the region of initial pH and Eh for Cr (VI) bio-reduction was included in the region for Leucobacter sp. Ch-1 growth and the stable region of Cr(OH)3, which implied that Cr (VI) could be reduced to trivalent chromium existing in the forms of Cr(OH)3 precipitate under the presence of Leucobacter sp. Ch-1 in alkaline condition. The results suggest that Leucobacter sp. Ch-1 has potential application for remediation of Cr (VI) contamination sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 157, Issues 2â3, 15 September 2008, Pages 518-524
Journal: Journal of Hazardous Materials - Volume 157, Issues 2â3, 15 September 2008, Pages 518-524
نویسندگان
Liyuan Chai, Zhihui Yang, Yunyan Wang, Rong Deng, Wenjie Zhu, Shunhong Huang,