https://scholars.lib.ntu.edu.tw/handle/123456789/408142
標題: | Anaerobic nitrate reduction with oxidation of Fe(II) by Citrobacter Freundii strain PXL1 - a potential candidate for simultaneous removal of As and nitrate from groundwater | 作者: | Li B. Pan X. Zhang D. Lee D.-J. Al-Misned F.A. Mortuza M.G. |
關鍵字: | As(III) removal;Biogenic iron oxides;Ferrous iron oxidizing bacteria;Nitrate reduction | 公開日期: | 2015 | 卷: | 77 | 起(迄)頁: | 196-201 | 來源出版物: | Ecological Engineering | 摘要: | Nitrate and arsenic are common pollutants in groundwater. However, we are still lacking technologies that can remove nitrate and arsenic simultaneously using a single species of microorganism. In the present study, the potential of synchronous removal of nitrate and arsenite from water by a single anaerobic nitrate-reducing Fe(II) oxidizing Citrobacter freundii strain PXL1 was assessed. The strain PXL1 could grow well in arsenite concentration of 2.85-13.65. £gM and efficiently oxidize Fe(II), reduce nitrate and remove As(III) from water. Scanning electron microscopy, X-ray diffraction spectroscopy, and Fourier transform infrared spectroscopy analysis showed that the strain PXL1 produced poorly crystalline Fe(III) oxides. As(III) was removed mainly by adsorption and co-precipitation of the biogenic Fe(III) oxides. The anaerobic nitrate-dependent Fe(II) oxidizing bacteria including C. freundii PXL1 are promising microbes for in situ remediation of nitrate and arsenite contaminated groundwater. ? 2015 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408142 | ISSN: | 09258574 | DOI: | 10.1016/j.ecoleng.2015.01.027 |
顯示於: | 化學工程學系 |
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