Stimulating soil microorganisms for mineralizing the herbicide isoproturon by means of microbial electroremediating cells

Microbial Biotechnology
Jose Rodrigo QuejigoAbraham Esteve-Núñez

Abstract

The absence of suitable terminal electron acceptors (TEA) in soil might limit the oxidative metabolism of environmental microbial populations. Microbial electroremediating cells (MERCs) consist in a variety of bioelectrochemical devices that aim to overcome electron acceptor limitation and maximize metabolic oxidation with the purpose of enhancing the biodegradation of a pollutant in the environment. The objective of this work was to use MERCs principles for stimulating soil bacteria to achieve the complete biodegradation of the herbicide (14) C-isoproturon (IPU) to (14) CO(2) in soils. Our study concludes that using electrodes at a positive potential [+600 mV (versus Ag/AgCl)] enhanced the mineralization by 20-fold respect the electrode-free control. We also report an overall profile of the (14) C-IPU metabolites and a (14) C mass balance in response to the different treatments. The remarkable impact of electrodes on the microbial activity of natural communities suggests a promising future for this emerging environmental technology that we propose to name bioelectroventing.

References

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Jun 18, 2015·Bioresource Technology·Mohammad Sherafatmand, How Yong Ng

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Citations

Apr 13, 2017·Microbial Biotechnology·Marta Estevez-CanalesAbraham Esteve-Núñez
Jun 24, 2017·Microbial Biotechnology·Ainara Domínguez-GarayAbraham Esteve-Núñez

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Methods Mentioned

BETA
soil treatments

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