Recent advancements in azo dye decolorization in bio-electrochemical systems (BESs): Insights into decolorization mechanism and practical application

Detoxification mechanisms of electroactive microorganisms under toxicity stress: A review

“…The extracellular detoxification mechanism of EAMs is mainly to reduce the electrophilicity of toxic pollutants by extracellular reduction, thereby reducing the pollutants’ toxicity effects ( Chen et al, 2019 ; Cui et al, 2021 ). Nitroaromatic hydrocarbons are common toxic organic pollutants.…”

Natural tea polyphenol functionalized graphene anode for simultaneous power production and degradation of methyl orange dye in microbial fuel cells

“…However, traditional treatment methods consume large amounts of energy or chemicals in decolorizing and degrading azo dye wastewater, leading to reduced energy utilization and potential secondary pollution in the post-treatment stage, as well as a sharp increase in treatment costs. 9 Therefore, under the double pressure, how to improve the performance of azo dye decolorization and at the same time increase the power generation efficiency is the core issue of this study. Microbial fuel cells (MFCs) are electrochemical devices that use microorganisms to decolorize and degrade dyes while producing electricity.…”

Electrical stress and acid orange 7 synergistically clear the blockage of electron flow in the methanogenesis of low-strength wastewater

“…Furthermore, the role of electron acceptors in promoting the degradation of organic acids has been confirmed by recent studies [ [28] , [29] , [30] , [31] ], which potentially alleviates the blockage in acetogenesis in low-strength environments. Acid orange 7 (AO7) is a typical azo dye with electrophilic azo bond [ 32 ] and low toxicity to methanogenesis [ 33 ], and it has been reported to effectively accelerate the decomposition of volatile organic acids (especially propionate) [ 29 ]. Therefore, it was employed in this study as a model electron acceptor, aiming to enrich EAB and accelerate acetogenesis.…”