Bioelectrochemical system for recalcitrant p-nitrophenol removal
Bioelectrochemical system for recalcitrant p-nitrophenol removal
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用于去除顽固性对硝基苯酚的生物电化学系统
DOI：
10.1016/j.jhazmat.2011.12.065
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发表时间：
2012-03-30
影响因子：
13.6
通讯作者：
Mu, Yang
中科院分区：
文献类型：
--
作者：
Shen, Jinyou;Feng, Cencen;Mu, Yang
研究了生物电化学系统(BES)去除难降解对硝基苯酚(PNP)的效果。在能耗为0.010+/-0.002 kWhmol(-1)PNP的情况下，PNP的有效去除速率可达9.14+/-0.48molm(-3)d(-1)。负阴极电位、进水PNP浓度和水力停留时间(HRT)越短，PNP的去除效果越好。虽然阳极处的库仑效率不超过40%，但在不同的阴极电位下，阴极处的库仑效率都在70%以上。与常规厌氧工艺相比，BES工艺的阴极库仑效率高，共基质投加量显著减少。对氨基苯酚(PAP)是Bess非生物石墨阴极上PNP还原的主要产物。这项研究表明，BES具有有效去除废水中硝基酚污染物的潜力。(C)2012年爱思唯尔BM。版权所有。
Bioelectrochemical system (BES) for recalcitrant p-nitrophenol (PNP) removal was investigated in this study. Effective removal of PNP at rates up to 9.14 +/- 0.48 mol m(-3) d(-1) was achieved at an energy consumption as low as 0.010 +/- 0.002 kWh mol(-1) PNP. PNP removal rate was enhanced with negative cathode potential, increased influent PNP concentration and shortened hydraulic retention time (HRT). Although the coulombic efficiencies at the anode did not exceed 40%, coulombic efficiencies for PNP removal at the cathode were above 70% at various cathode potentials. Compared with conventional anaerobic process, the cosubstrate dosage in BES was significantly reduced due to the high coulombic efficiencies at the cathode. p-Aminophenol (PAP) was identified as the dominant product of PNP reduction at the abiotic graphite cathode of BESs. This study demonstrated that the BES had a potential for efficient removal of nitrophenol pollutants from wastewater. (C) 2012 Elsevier BM. All rights reserved.