Microbial-electrochemical bioremediation and detoxification of dibenzothiophene-polluted soil

Chemosphere
Jose RodrigoAbraham Esteve-Nuñez

Abstract

Bioremediation is a relatively efficient and cost-effective technology for treating polluted soils. However, the availability of suitable electron acceptors to sustain microbial respiration can reduce the microbial activity. This work aims to evaluate the impact of burying electrically conductive electron acceptors in soil for enhancing the removal of dibenzothiophene (DBT) by native electrogenic microbes. Although this novel approach is based on the use of a microbial electrochemical technology as microbial fuel cells, our goal is not to harvest energy but to maximize bioremediation, so we concluded to name the device as Microbial Electroremediating Cell (MERC). Our results proved that stimulating the microbial electrogenic metabolism, DBT removal was enhanced by more than 3-fold compared to the natural attenuation. On top of that, ecotoxicological test using green algae confirms a decrease of 50% in the toxicity of the treated soil during incubation in MERC, in contrast to the unaltered values detected under natural conditions.

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Citations

Feb 18, 2016·Microbial Biotechnology·Jose Rodrigo QuejigoAbraham Esteve-Núñez
Jan 7, 2015·Biotechnology Advances·Wen-Wei Li, Han-Qing Yu
Oct 29, 2014·Environmental Microbiology Reports·Marta Estevez-CanalesAbraham Esteve-Núñez
Jul 23, 2016·Chemosphere·Ainara Domínguez-GarayAbraham Esteve-Núñez
Apr 13, 2017·Microbial Biotechnology·Marta Estevez-CanalesAbraham Esteve-Núñez
Oct 7, 2017·Microbial Biotechnology·Narcís PousSebastià Puig
Jun 24, 2017·Microbial Biotechnology·Ainara Domínguez-GarayAbraham Esteve-Núñez
Feb 13, 2021·Chemosphere·Syed Zaghum Abbas, Mohd Rafatullah

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