Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China.
Water Res. 2013 Oct 1;47(15):5511-9. doi: 10.1016/j.watres.2013.06.025. Epub 2013 Jun 24.
The effect of nitro-substituent on mononitrophenol (o-nitrophenol (ONP), m-nitrophenol (MNP) and p-nitrophenol (PNP)) reduction in a bioelectrochemical system (BES) was investigated in this study. The results show that the removal of all three nitrophenols was significantly enhanced with more negative cathode potential and shortened hydraulic retention time in the BESs. Moreover, the reduction of the three nitrophenols followed in the order of ONP > MNP > PNP in the BESs. Both quantum chemical calculation using density function theory and cyclic voltammetry analysis confirmed the reductive sequence of the three nitrophenols. In addition, the acute toxicity of nitrophenol effluent significantly decreased while its biodegradability was enhanced after treatment in the BES. Therefore, the BES technology offers bright prospects for efficient treatment of nitrophenol-containing wastewater.
本研究考察了硝基取代基对生物电化学系统（BES）中单硝基苯酚（邻硝基苯酚（ONP）、间硝基苯酚（MNP）和对硝基苯酚（PNP））还原的影响。结果表明，在 BES 中，随着阴极电位更负和水力停留时间缩短，三种硝基苯酚的去除率均显著提高。此外，在 BES 中，三种硝基苯酚的还原顺序为 ONP > MNP > PNP。密度泛函理论的量子化学计算和循环伏安分析均证实了三种硝基苯酚的还原顺序。此外，BES 处理后，硝基苯酚废水的急性毒性显著降低，生物降解性增强。因此，BES 技术为高效处理含硝基苯酚废水提供了广阔的前景。
