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Investigation of CNT/PPy-Modified Carbon Paper Electrodes under Anaerobic and Aerobic Conditions for Phenol Bioremediation in Microbial Fuel Cells.
ACS Omega ( IF 3.7 ) Pub Date : 2019-12-26 , DOI: 10.1021/acsomega.9b02981 Nishat Khan 1 , Abdul Hakeem Anwer 1 , Anees Ahmad 1 , Suhail Sabir 1 , Surajbhan Sevda 2 , Mohammad Zain Khan 1
ACS Omega ( IF 3.7 ) Pub Date : 2019-12-26 , DOI: 10.1021/acsomega.9b02981 Nishat Khan 1 , Abdul Hakeem Anwer 1 , Anees Ahmad 1 , Suhail Sabir 1 , Surajbhan Sevda 2 , Mohammad Zain Khan 1
Affiliation
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The study presents the comparative bioelectrochemical treatment of phenol in anodic and cathodic compartments of four identical dual chambered microbial fuel cells (MFCs) with bare and multiwalled carbon nanotube/polypyrrole (MWCNT/PPy)-coated electrodes, respectively. It was observed that systems performing biocathodic treatment of phenol performed better as compared to the systems performing bioanodic treatment. The maximum power densities for bioanodic phenol treatment using bare and coated electrodes were found to be 469.038 and 560.719 mW/m2, while for biocathodic treatment, they were observed to be 604.804 and 650.557 mW/m2, respectively. The MFCs performing biocathodic treatment of phenol consistently showed higher chemical oxygen demand removal efficiency, Coulombic efficiency, and power density and indicated the better performance of the biocathodic bare (B-MFC) and coated (C-MFC) MFCs as compared to the bioanodic B-MFC and C-MFC. UV/vis spectrophotometry revealed that the MWCNT/PPy-coated carbon paper worked significantly better in the treatment of phenol with admirable treatment obtained within a week of the experiment as compared to the system with bare carbon paper. Cyclic voltammetry asserted better electrochemical activity of the MFC systems with coated electrodes in the treatment of phenol. The electrochemical impedance spectroscopy data also supported the better performance of biocathodic phenol treatment with lower internal and charge transfer resistances. The scanning electron microscopy images confirmed the active biofilm formation on the electrode surface. The study indicates MFC as a viable option for the treatment of recalcitrant chemical compounds with energy recovery.
中文翻译：
厌氧和好氧条件下 CNT/PPy 改性碳纸电极用于微生物燃料电池中苯酚生物修复的研究。
该研究介绍了四个相同的双室微生物燃料电池（MFC）的阳极和阴极室中苯酚的比较生物电化学处理，分别具有裸露和多壁碳纳米管/聚吡咯（MWCNT/PPy）涂层电极。据观察，与进行生物阳极处理的系统相比，进行苯酚生物阴极处理的系统表现更好。使用裸电极和涂层电极进行生物阳极苯酚处理的最大功率密度分别为 469.038 和 560.719 mW/m2，而对于生物阴极处理，观察到的最大功率密度分别为 604.804 和 650.557 mW/m2。对苯酚进行生物阴极处理的 MFC 始终表现出更高的化学需氧量去除效率、库仑效率和功率密度，并表明与生物阳极 B 相比，生物阴极裸 (B-MFC) 和涂层 (C-MFC) MFC 具有更好的性能-MFC和C-MFC。紫外/可见分光光度法显示，与裸碳纸系统相比，MWCNT/PPy 涂层碳纸在苯酚处理方面的效果明显更好，在实验一周内获得了令人钦佩的处理效果。循环伏安法证实具有涂层电极的 MFC 系统在处理苯酚时具有更好的电化学活性。电化学阻抗谱数据还支持生物阴极苯酚处理具有更好的性能以及更低的内阻和电荷转移电阻。扫描电子显微镜图像证实了电极表面活性生物膜的形成。该研究表明 MFC 是通过能量回收来处理顽固化合物的可行选择。
更新日期：2020-01-14
中文翻译：
厌氧和好氧条件下 CNT/PPy 改性碳纸电极用于微生物燃料电池中苯酚生物修复的研究。
该研究介绍了四个相同的双室微生物燃料电池（MFC）的阳极和阴极室中苯酚的比较生物电化学处理，分别具有裸露和多壁碳纳米管/聚吡咯（MWCNT/PPy）涂层电极。据观察，与进行生物阳极处理的系统相比，进行苯酚生物阴极处理的系统表现更好。使用裸电极和涂层电极进行生物阳极苯酚处理的最大功率密度分别为 469.038 和 560.719 mW/m2，而对于生物阴极处理，观察到的最大功率密度分别为 604.804 和 650.557 mW/m2。对苯酚进行生物阴极处理的 MFC 始终表现出更高的化学需氧量去除效率、库仑效率和功率密度，并表明与生物阳极 B 相比，生物阴极裸 (B-MFC) 和涂层 (C-MFC) MFC 具有更好的性能-MFC和C-MFC。紫外/可见分光光度法显示，与裸碳纸系统相比，MWCNT/PPy 涂层碳纸在苯酚处理方面的效果明显更好，在实验一周内获得了令人钦佩的处理效果。循环伏安法证实具有涂层电极的 MFC 系统在处理苯酚时具有更好的电化学活性。电化学阻抗谱数据还支持生物阴极苯酚处理具有更好的性能以及更低的内阻和电荷转移电阻。扫描电子显微镜图像证实了电极表面活性生物膜的形成。该研究表明 MFC 是通过能量回收来处理顽固化合物的可行选择。
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