A review on bio-electro-Fenton systems as environmentally friendly methods for degradation of environmental organic pollutants in wastewater

Abstract

Bio-electro-Fenton system is a promising technology for the environmental organic pollutants degradation and bioelectricity generation.

The application of ferrous and graphitic N modified graphene-based composite cathode material in the bio-electro-Fenton system driven by sediment microbial fuel cells to degrade methyl orange

“…Initially, as the concentration of Fe 2+ ions increase, the production of H 2 O 2 also increases. This is because Fe 2+ ions can react with H 2 O 2 to produce hydroxyl radicals via the Fenton reaction [ 26 ]. This reaction is beneficial for the degradation of organic pollutants and can enhance the performance of the SMFC [ 26 ].…”

“…This is because Fe 2+ ions can react with H 2 O 2 to produce hydroxyl radicals via the Fenton reaction [ 26 ]. This reaction is beneficial for the degradation of organic pollutants and can enhance the performance of the SMFC [ 26 ]. However, as the concentration of Fe 2+ ions continue to increase, the production of H 2 O 2 may decrease.…”

“…The Bio-E-Fenton system, derived from AOPs, enables the degradation of refractory organics in the dual microbial fuel cell [ 15 ]. Bio-electro-Fenton (BEF) systems have been studied as a promising technology to achieve environmental organic pollutants degradation and bioelectricity generation [ 26 ]. A novel bio-electro-Fenton system was developed with dual application for the catalytic degradation of tetracycline antibiotic in wastewater and bioelectricity generation.…”

“…The system was able to achieve up to 99.04 ± 0.91% tetracycline degradation after 24 h under optimal conditions [ 27 ]. Despite the advantages of this technology, there are still problems to consider including low production of current density, chemical requirement for pH adjustment, iron sludge formation due to the addition of iron catalysts and costly materials used [ 26 , 28 ].…”

Intensification of Gas–Liquid Mass-Transfer Efficiency by Introducing a Superaerophilic Surface in the Ozonation Process

“…However, due to the wastewater components becoming more and more complex, traditional wastewater treatment methods such as filtration, flocculation, adsorption, precipitation, and biodegradation cannot meet the increasingly stringent standard. Advanced oxidation processes (AOPs) including photocatalyst, − ozonation, Fenton oxidation, , cavitation or hydrodynamic cavitation, − and electrochemical oxidation are put forward to solve this problem. Compared with traditional methods, AOPs introduce chemical oxidations of various active substances and free radicals into wastewater treatment to obtain better degradation performance. , …”