在预驯化生物阳极的单室微生物电解池中快速降解 2,4-二氯硝基苯：全面评估。
Rapid degradation of 2,4-dichloronitrobenzene in single-chamber microbial electrolysis cell with pre-acclimated bioanode: A comprehensive assessment.
机构信息
Institute of Environment Pollution Control and Treatment, Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
出版信息
Sci Total Environ. 2020 Jul 1;724:138053. doi: 10.1016/j.scitotenv.2020.138053. Epub 2020 Mar 19.
2,4-dichloronitrobenzene (DClNB) as a typical refractory pollutant, exists in multifarious industrial wastewater widely and poses a serious threat to the environment. An ion exchange membrane (IEM)-free microbial electrolysis cell (MEC) with pre-acclimated bioanode was built and evaluated systematically for treatment of DClNB containing wastewater. Results showed that compared with the non-acclimated or IEM-equipped MECs, the pre-acclimated IEM-free MECs had the best DClNB removal efficiency of 91.3% under COD and DClNB loading rates of nearly 1000 kg m d and 100 g m d. Both of anode pre-acclimation and IEM removal reduced the electron transfer resistance by 71.1 and 194.5 Ω, respectively. Compared to the pre-acclimated IEM-equipped MEC, the cathode current efficiency of pre-acclimated IEM-free MEC increased by 13.7%. Analysis of live/dead cell staining indicated that a higher proportion of live cells was observed in the acclimated anode biofilm (66.1% vs. 47.3%), and the detoxification of DClNB in the pre-acclimated IEM-free MECs was significantly better (p < 0.05) than those of non-acclimated or IEM-equipped MECs. This study contributes to the performance improvement of the MEC process for treatment of toxic industrial wastewater.
2,4-二氯硝基苯（DClNB）作为一种典型的难降解污染物，广泛存在于各种工业废水中，对环境构成严重威胁。本研究构建并系统评估了一种具有预驯化生物阳极的无离子交换膜（IEM）微生物电解池（MEC），用于处理含 DClNB 的废水。结果表明，与未经驯化或配备 IEM 的 MEC 相比，在 COD 和 DClNB 负荷率接近 1000 kg m d 和 100 g m d 的情况下，预驯化无 IEM 的 MEC 对 DClNB 的去除效率最高，达到 91.3%。阳极预驯化和 IEM 去除分别将电子传递阻力降低了 71.1 和 194.5 Ω。与预驯化 IEM 配备的 MEC 相比，预驯化无 IEM 的 MEC 的阴极电流效率提高了 13.7%。死活细胞染色分析表明，驯化阳极生物膜中活细胞的比例更高（66.1%比 47.3%），预驯化无 IEM 的 MEC 对 DClNB 的解毒效果明显优于未经驯化或配备 IEM 的 MEC（p < 0.05）。本研究为 MEC 工艺处理有毒工业废水的性能提升提供了参考。
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