Microbial-electrochemical bioremediation and detoxification of dibenzothiophene-polluted soil

Rodrigo, J.F. and Boltes, K. and Esteve-Núñez, A. (2014) Microbial-electrochemical bioremediation and detoxification of dibenzothiophene-polluted soil. Chemosphere, 101. pp. 61-65. ISSN 00456535

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Official URL: http://dx.doi.org/10.1016/j.chemosphere.2013.11.06...

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.

Item Type: Article
Uncontrolled Keywords: Bioremediation; Microbial fuel cell; Microbial Electroremediating Cell; Dibenzothiophene; Soil; Ecotoxicity
Subjects: Q Science > QR Microbiology
T Technology > TD Environmental technology. Sanitary engineering
Depositing User: José Ángel Gómez Martín
Date Deposited: 29 Apr 2014 08:28
Last Modified: 12 Apr 2017 07:29
URI: http://eprints.imdea-agua.org:13000/id/eprint/406

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