Bioelectroventing: an electrochemical-assisted bioremediation strategy for cleaning-up atrazine-polluted soils

Autor:	Abraham Esteve-Núñez, Ulrike Dörfler, Ainara Domínguez-Garay, Reiner Schroll, Jose Rodrigo Quejigo
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	Microbiological Techniques 0301 basic medicine Bioengineering 010501 environmental sciences 01 natural sciences Applied Microbiology and Biotechnology Biochemistry Soil 03 medical and health sciences chemistry.chemical_compound Bioremediation Soil Pollutants Atrazine Research Articles 0105 earth and related environmental sciences Pollutant chemistry.chemical_classification Herbicides Chemistry Electrochemical Techniques Mineralization (soil science) QR Microbiology Carbon Dioxide Biodegradation Electron acceptor QS Ecology QD Chemistry Environmental technology Biodegradation Environmental 030104 developmental biology Environmental chemistry Soil water Oxidation-Reduction Research Article Biotechnology
Zdroj:	Microb. Biotechnol. 11, 50-62 (2017) Microbial Biotechnology
DOI:	10.1111/1751-7915.12687
Popis:	The absence of suitable terminal electron acceptors (TEA) in soil might limit the oxidative metabolism of environmental microbial populations. Bioelectroventing is a bioelectrochemical strategy that aims to enhance the biodegradation of a pollutant in the environment by overcoming the electron acceptor limitation and maximizing metabolic oxidation. Microbial electroremediating cells (MERCs) are devices that can perform such a bioelectroventing. We also report an overall profile of the (14) C-ATR metabolites and (14) C mass balance in response to the different treatments. The objective of this work was to use MERC principles, under different configurations, to stimulate soil bacteria to achieve the complete biodegradation of the herbicide (14) C-atrazine (ATR) to (14) CO2 in soils. Our study concludes that using electrodes at a positive potential [+600mV (versus Ag/AgCl)] ATR mineralization was enhanced by 20-fold when compared to natural attenuation in electrode-free controls. Furthermore, ecotoxicological analysis of the soil after the bioelectroventing treatment revealed an effective clean-up in
Databáze:	OpenAIRE
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