Application of redox mediators in bioelectrochemical systems
Claudia M Martinez1, Luis H Alvarez2
1Universidad Autonoma de San Luis Potosi (UASLP), Facultad de Ciencias, Av. Dr. Salvador Nava Martinez S/N C.P., Zona Universitaria, San Luis Potosi 78290, San Luis Potosi, Mexico.
Biotechnology Advances
|June 2, 2018
Summary
Redox mediators enhance electron transfer in bioelectrochemical systems (BES). This review covers their use in electricity generation and wastewater treatment, proposing future research in biohydrogen and metal recovery.
Area of Science:
- Environmental Science
- Electrochemistry
- Microbiology
Background:
- Redox mediators (RM) are compounds facilitating microbial electron transfer, acting as electron acceptors and donors.
- Their application in bioelectrochemical systems (BES) is crucial for enhancing microbial-to-electrode electron exchange.
- Recent evidence highlights RM's significant role in improving BES performance.
Purpose of the Study:
- To review the application of soluble and immobilized redox mediators in BES.
- To summarize findings on electricity generation and wastewater contaminant treatment using RM in BES.
- To propose future research directions for RM in BES, including biohydrogen production and metal recovery.
Main Methods:
- Review of existing literature on redox mediators in bioelectrochemical systems.
- Analysis of studies focusing on soluble and immobilized RM applications.
- Synthesis of results concerning electricity production and pollutant degradation.
Main Results:
- Redox mediators significantly enhance electron transfer rates in BES.
- RM application improves both electricity generation and wastewater treatment efficiency in BES.
- Soluble and immobilized RM show distinct advantages depending on the specific BES application.
Conclusions:
- Redox mediators are effective enhancers for microbial electron transfer in BES.
- BES utilizing RM show promise for sustainable energy production and environmental remediation.
- Future research should explore novel RM, including humic substances, for advanced BES applications like biohydrogen production and metal recovery.
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