期刊
CHEMICAL ENGINEERING JOURNAL
卷 365, 期 -, 页码 317-324出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.02.048
关键词
Cathode membrane; Reduced graphene oxide; Palladium; Membrane bioreactor; Microbial fuel cell
资金
- basic scientific research special fund project of Southwest Minzu University [2019NQN21]
- science and technology project of Sichuan Province [19YYJC0226]
A new PVDF composite cathode membrane (PCCM) with electro-deposited Pd-rGO on PVDF/carbon fiber cloth, abbreviated as Pd-rGO PCCM, was developed. The as-prepared Pd-rGO PCCM was characterized by SEM, TEM and XRD. And it was further used in membrane bioreactor (MBR)/microbial fuel cell (MFC) coupled wastewater treatment system. The results indicated after electro-deposition, the Pd-rGO was uniformly distributed on the surface of PCCM. Under 15 cycled Pd electro-deposition on carbon fiber cloth, the Pd-15-rGO PCCM exhibited the highest catalytic activity compared to other cycles, and the optimized deposition density of rGO and Pd were 0.124 mg cm(-2) and 2.31 mg cm(-2) respectively. Under an electric field of -0.4 V cm(-1), the Pd-15-rGO PCCM showed approximately 1.9 times improvement of stable membrane flux (128-130 Lm(-2) h(-1)) compared to the condition without electric field (66 Lm(-2) h(-1)). In MBR/MFC wastewater treatment system, using Pd-15-rGO PCCM as cathode membrane, the maximum power density was 1210 mW m(-3), approximately 3.8 times higher than using initial PCCM (312 mW m(-3)). Moreover, The Pd-15-rGO PCCM in MBR/MFC coupled system showed excellent contaminants removal rates towards both traditional organic contaminants (COD at 90% and NH4+-N at 81%) in sewage and trace persistent contaminants (i.e. PAHs and phenols) in the effluent of coking wastewater.
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