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BES research focusing on bacteria, wastewater, substrate. Abstract Although the capacity for electroactive bacteria to convert environmental metallic minerals and organic pollutants is well known, the role of the redox propert...

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What they did

System
MFC

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Abstract

Abstract Although the capacity for electroactive bacteria to convert environmental metallic minerals and organic pollutants is well known, the role of the redox properties of microbial extracellular polymeric substances (EPS) in this process is poorly understood. In this work, the redox properties of EPS from two widely present electroactive bacterial strains ( Shewanella oneidensis and Pseudomonas putida ) were explored. Electrochemical analysis demonstrates that the EPS extracted from the two strains exhibited redox properties. Spectroelectrochemical and protein electrophoresis analyses indicate that the extracted EPS from S. oneidensis and P. putida contained heme-binding proteins, which were identified as the possible redox components in the EPS. The results of heme-mediated behavior of EPS may provide an insight into the important roles of EPS in electroactive bacteria to maximize their redox capability for biogeochemical cycling, environmental bioremediation and wastewater treatment.

Keywords

Shewanella oneidensisRedoxExtracellular polymeric substancePseudomonas putidaBacteriaShewanella

Identifiers

DOI
10.1038/srep39098
Journal
Scientific Reports
Year
2016