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Enhanced p-nitrophenol removal in a membrane-free bio-contact coupled bioelectrochemical system

机译：增强在无膜的生物接触耦合生物电化学系统中的p-硝基苯酚去除

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摘要

In this study, a membrane-free bio-contact coupled bioelectrochemical system (BC-BES) was established for the enhanced reductive transformation of p-nitrophenol (PNP). The results showed that the electric field played a key role in both PNP reduction and p-aminophenol (PAP) formation. The vast majority of PNP was reductively transformed to PAP in the biocathode of BC-BES. At a cathode potential of -1000 mV vs. Ag/AgCl and hydraulic retention time (HRT) of 8.9 h, PNP removal rate as high as 18.95 + 0.10 mol per m(3) per day could be achieved in the BC-BES with acetate as the electron donor. High PNP removal and PAP formation could be achieved at low acetate dosage, high initial PNP concentration and short HRT, indicating the strong ability of the BC-BES to resist shock loading. Furthermore, partial mineralization of PAP was observed in the anode of the BC-BES, which was beneficial for the further polishing of the BC-BES effluent. Considering the advantages of high loading rate, low acetate consumption and high system stability, it is hoped that the application of this BC-BES will enhance the reductive removal of nitrophenols from wastewaters.
机译：在该研究中，建立了无膜的生物接触耦合生物电化学系统（BC-BES），用于增强对硝基苯酚（PNP）的增强的还原转化。结果表明，电场在PNP还原和P-氨基苯酚（PAP）形成中起关键作用。在BC-BES的生物传道中，将绝大多数PNP还原为PAP。在-1000mV的阴极电位，Ag / AgCl和液压保留时间（HRT）的8.9小时，PNP除去率高达18.95 + 0.10 mol /天每天，可以在BC-BES中实现作为电子给体的醋酸盐。可以在低醋酸剂量，高初始PNP浓度和短的HRT下实现高PNP去除和PAP形成，表明BC-BE抵抗冲击载荷的强能力。此外，在BC-BES的阳极中观察到PAP的部分矿化，这对于BC-BES流出物的进一步抛光有益。考虑到载荷速率高，醋酸纤维消耗量和高系统稳定性高的优点，希望该BC-BES的应用将增强废水中的硝苯酚的还原。

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  • 来源
    《RSC Advances》 |2015年第34期|共8页
  • 作者

    Lou Shuai; Jiang Xinbai; Chen Dan; Shen Jinyou; Han Weiqing; Sun Xiuyun; Li Jiansheng; Wang Lianjun;

  • 作者单位

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Jiangsu Key Lab Chem Pollut Control &

    Resources R Sch Environm &

    Biol Engn Nanjing 210094 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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