Journal article · Ahead of Print article
Energy-harvesting bio-electro-dehalogenation for sustainable wastewater treatment
The concept of an “energy-harvesting bio-electro-dehalogenation” process is demonstrated, where exoelectrogenic bacteria in an anodic chamber of a microbial fuel cell (MFC) are used to capture and exploit the electrical energy stored in the biodegradable substrate (acetate). The acetate was derived from full electrocatalytic dehalogenation of non-biodegradable halogenated organic compounds (haloacetic acids) in the cathodic chamber.
Cobalt(II) meso-tetraphenylporphyrin serves the role as electrocatalyst in the MFC. Cyclic voltammetric analysis shows that full dehalogenation requires a cathodic potential of −1.1 V vs. Ag/AgCl which can be augmented by stacked MFCs powered by the dehalogenated products. Cyclic voltammetric analysis and ion chromatography measurement confirm that electrogenerated cobalt(I) meso-tetraphenylporphyrin is catalyzing the reduction of tri-, di-, and monochloroacetic acids in a sequential dehalogenation processes.
The energy harvesting concept is also applicable to other bio-electrochemical processes for treatment of bio-refractory pollutants.
Language: | English |
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Year: | 2018 |
Pages: | 38-45 |
ISSN: | 18733859 and 00134686 |
Types: | Journal article and Ahead of Print article |
DOI: | 10.1016/j.electacta.2018.09.056 |
ORCIDs: | 0000-0002-8919-2576 , 0000-0003-0212-8190 , Zhang, Yifeng and 0000-0002-8617-2393 |