Anaerobic treatment of groundwater co-contaminated by toluene and copper in a single chamber bioelectrochemical system.

Autor: Resitano M; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Tucci M; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Mezzi A; Institute for the Study of Nanostructured Materials, National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Kaciulis S; Institute for the Study of Nanostructured Materials, National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Matturro B; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy; National Biodiversity Future Center, Palermo 90133, Italy., D'Ugo E; Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy., Bertuccini L; Core Facilities, Istituto Superiore di Sanità, Rome, Italy., Fazi S; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Rossetti S; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy., Aulenta F; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy; National Biodiversity Future Center, Palermo 90133, Italy., Cruz Viggi C; Water Research Institute (IRSA), National Research Council (CNR), 00010 Montelibretti, (RM), Italy. Electronic address: carolina.cruzviggi@irsa.cnr.it.
Jazyk: angličtina
Zdroj: Bioelectrochemistry (Amsterdam, Netherlands) [Bioelectrochemistry] 2024 Aug; Vol. 158, pp. 108711. Date of Electronic Publication: 2024 Apr 13.
DOI: 10.1016/j.bioelechem.2024.108711
Abstrakt: Addressing the simultaneous removal of multiple coexisting groundwater contaminants poses a significant challenge, primarily because of their different physicochemical properties. Indeed, different chemical compounds may necessitate establishing distinct, and sometimes conflicting, (bio)degradation and/or removal pathways. In this work, we investigated the concomitant anaerobic treatment of toluene and copper in a single-chamber bioelectrochemical cell with a potential difference of 1 V applied between the anode and the cathode. As a result, the electric current generated by the bioelectrocatalytic oxidation of toluene at the anode caused the abiotic reduction and precipitation of copper at the cathode, until the complete removal of both contaminants was achieved. Open circuit potential (OCP) experiments confirmed that the removal of copper and toluene was primarily associated with polarization. Analogously, abiotic experiments, at an applied potential of 1 V, confirmed that neither toluene was oxidized nor copper was reduced in the absence of microbial activity. At the end of each experiment, both electrodes were characterized by means of a comprehensive suite of chemical and microbiological analyses, evidencing a highly selected microbial community competent in the biodegradation of toluene in the anodic biofilm, and a uniform electrodeposition of spherical Cu 2 O nanoparticles over the cathode surface.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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