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FeS@rGO nanocomposites as electrocatalysts for enhanced chromium removal and clean energy generation by microbial fuel cell
Ali, Jafar; Wang, Lei; Waseem, Hassan; Djellabi, Ridha; Oladoja, N. A.; Pan, Gang
2020-03-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume384Pages:1-11
AbstractBioelectrochemical removal of Cr(VI) and consequent renewable energy generation from wastewater is a promising technology. However, slow reaction kinetics, expensive catalysts, and hydrophobic binders remain a significant challenge for the commercialization of this emerging technology. In the present study, for the first time, graphite felt modified with iron sulfide wrapped with reduced graphene oxide (FeS@rGO) nanocomposites were used as a cathode in a dual-chamber microbial fuel cell (MFC) for concurrent Cr(VI) reduction and power generation. The MFC with FeS@rGO nanocomposites (MFC-FeS@rGO) exhibited 100% Cr(VI) removal efficiency for the concentration of 15 mg/L and also acquired a high reduction rate of 1.43 mg/L/h, which was approximately 4.6 times higher than MFC-blank. MFC-FeS@rGO delivered the maximum power density of 154 mW/m(2), and it was 328% high as that of MFC-blank (36 mW/m(2)). High cathodic coulombic efficiency for MFC-FeS@rGO (61 +/- 0.8%) indicated that the substantial amount of charge produced by exoelectrogens was mainly consumed for Cr(VI) reduction. Overall improved electrochemical performance of MFC-FeS@rGO was attributed to the high conductivity, low internal resistance, and better reaction kinetics of FeS@rGO nanocomposites. This study has demonstrated the highest reduction rate and high power production compared with previous studies, which have used very high concentrations of Cr(VI). Hence, it is expected that current findings will help to scale up the simultaneous Cr(VI) reduction and power generation from real wastewater.
Department环境纳米技术与健康效应重点实验室
KeywordElectrochemical Microbial fuel cell Chromium Renewable energy Wastewater treatment
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/44872
Collection环境纳米技术与健康效应重点实验室
Recommended Citation
GB/T 7714
Ali, Jafar,Wang, Lei,Waseem, Hassan,et al. FeS@rGO nanocomposites as electrocatalysts for enhanced chromium removal and clean energy generation by microbial fuel cell[J]. CHEMICAL ENGINEERING JOURNAL,2020,384:1-11.
APA Ali, Jafar,Wang, Lei,Waseem, Hassan,Djellabi, Ridha,Oladoja, N. A.,&Pan, Gang.(2020).FeS@rGO nanocomposites as electrocatalysts for enhanced chromium removal and clean energy generation by microbial fuel cell.CHEMICAL ENGINEERING JOURNAL,384,1-11.
MLA Ali, Jafar,et al."FeS@rGO nanocomposites as electrocatalysts for enhanced chromium removal and clean energy generation by microbial fuel cell".CHEMICAL ENGINEERING JOURNAL 384(2020):1-11.
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