Pilot-scale bioelectrochemical system for efficient conversion of 4-chloronitrobenzene
Pilot-scale bioelectrochemical system for efficient conversion of 4-chloronitrobenzene
复制标题
高效转化4-氯硝基苯的中试生物电化学系统
DOI：
10.1080/09593330.2015.1013572
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发表时间：
2015-02
影响因子：
2.8
通讯作者：
Nan-Qi Ren
中科院分区：
文献类型：
--
作者：
Yuan Yuan;Shi-Jie You;Jin-Na Zhang;Xiao-Bo Gong;Xiu-Heng Wang;Nan-Qi Ren
4-氯硝基苯(4-CNB)是一种对生态环境具有急性、慢性或持久性生理毒性的剧毒污染物。传统的去除水环境中4-CNB的方法存在效率低、成本高、可持续性差等问题。本研究开发了中试规模的生物电化学系统(有效体积为18 的L)，并考察了该系统在连续运行条件下对4-氰基丁烷生物电化学转化为4-氯苯胺(4-CAN)的性能。结果表明，进水中4-CNB的初始浓度和水力停留时间(HRT)对4-CNB的还原和4-CAN的生成有显著影响。与常规厌氧工艺相比，在没有外加电源的情况下，4-CNB的转化效率在有电源的情况下可以得到提高，这是因为在负阴极电位下微生物介导的电子转移。在电压为0.4 V、水力停留时间为48 h的条件下，4-氰基B的还原效率和4-CAN的生成效率分别达到99%和94.1%。基于较小的外加电压，中试规模的BES可以有效地将4-CNB转化为4-CaN，这是一种毒性较小、后续处理的生物利用度较高的中间体。本研究为消除4-CNB提供了一种新的策略和方法，使废水处理更加经济和可持续。
4-Chloronitrobenzene (4-CNB) is one of the highly toxic contaminants that may lead to acute, chronic or persistent physiological toxicity to ecology and environment. Conventional methods for removing 4-CNB from aquatic environment may be problematic due to inefficiency, high cost and low sustainability. This study develops a pilot-scale bioelectrochemical system (BES, effective volume of 18 L) and examines its performance of bioelectrochemical transformation of 4-CNB to 4-chloroaniline (4-CAN) under continuous operation. The results demonstrate that the initial 4-CNB concentration in the influent and hydraulic retention time (HRT) has a significant impact on 4-CNB reduction and 4-CAN formation. Compared with the conventional anaerobic process in the absence of external power supplied, the 4-CNB conversion efficiency can be enhanced with power supplied due to microbial-mediated electron transfer at the negative cathode potential. At a voltage of 0.4 V and HRT of 48 h, the 4-CNB reduction and 4-CAN formation efficiency reached 99% and 94.1%, respectively. Based on a small external voltage applied, the pilot-scale BES is effective in the conversion of 4-CNB to 4-CAN, an intermediate that is of less toxicity and higher bioavailability for subsequent treatment. This study provides a new strategy and methods for eliminating 4-CNB, making wastewater treatment more economical and more sustainable.
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影响因子：
5.4
作者：
Yan Li;Anhuai Lu;Hongrui Ding;Xin Wang;Changqiu Wang;Cuiping Zeng;Yun Yan
通讯作者：
Yan Li;Anhuai Lu;Hongrui Ding;Xin Wang;Changqiu Wang;Cuiping Zeng;Yun Yan
影响因子：
11.2
作者：
S. Sevda;X. Dominguez-Benetton;K. Vanbroekhoven;H. Wever;T. R. Sreekrishnan;D. Pant
通讯作者：
S. Sevda;X. Dominguez-Benetton;K. Vanbroekhoven;H. Wever;T. R. Sreekrishnan;D. Pant
影响因子：
11.4
作者：
Wang, Haiping;Jiang, Sunny C.;Xiao, Bo
通讯作者：
Xiao, Bo
影响因子：
11.4
作者：
S. Haderlein;R. Schwarzenbach
通讯作者：
S. Haderlein;R. Schwarzenbach
DOI：
10.1016/0003-2697(90)90598-4
发表时间：
1971
期刊：
--
影响因子：
--
作者：
D. Washington
通讯作者：
D. Washington