Inducing laccase activity in white rot fungi using copper ions and improving the efficiency of azo dye treatment with electricity generation using microbial fuel cells. (March 2020)

• Record Type: Journal Article
• Authors: Liu, Shu-Hui; Tsai, Shen-Long; Guo, Pei-Yu; Lin, Chi-Wen
• Is Part Of: Chemosphere. Volume 243(2020)
• Publication Date: 2020-03
• Subjects: Acid orange 7 (AO-7) -- Microbial fuel cell (MFC) -- White rot fungus (WRF) -- Laccase activity -- Electricity generation -- Decolorization; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2019.125304
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: This work presents a white rot fungus-microbial fuel cell (WRF-MFC) that uses WRF that is grown at its cathode. Adding Cu 2+ to the fungi-containing solid medium stimulated WRF-secreting laccase, which catalyzed the redox reaction in the MFC and thereby promoting the generation of electricity. Adding 12.5 mg L −1 Cu 2+ to a G. lucidum -containing medium provided the greatest laccase stimulation and increased the laccase activity by a factor of 1.6. Adding 12.5 mg L −1 Cu 2+ to the WRF chamber of WRF-MFC increased its decolorization of Acid Orange 7 (AO-7) and increased its power density to 223 mW m −2, which was 1.77 times that of an MFC without WRF. The enhancement of decolorization and electricity generation improved the performance of the WRF-MFC, indicating that a laccase-catalyzed cathode has great potential effectiveness in microbial fuel cells. Graphical abstract: Image 1 Highlights: An isolate of white rot fungus (WRF) enhanced laccase activity of WRF. Adding a WRF-containing solid medium increased the laccase activity of WRF. A laccase-catalyzed cathode in microbial fuel cell (MFC) improved power generation. A mechanism of the decolorization of azo dye wastewater by WRF-MFC was proposed.