: Subsurface co-contamination by multiple pollutants can be challenging for the design of bioremediation strategies since it may require promoting different and often antagonistic degradation pathways. Here, we investigated the simultaneous degradation of toluene and chloroform (CF) in a continuous-flow anaerobic bioelectrochemical reactor. As a result, 47 μmol L-1 d-1 of toluene and 60 μmol L-1 d-1 of CF were concurrently removed, when the anode was polarized at +0.4 V vs. Standard Hydrogen Electrode (SHE). Analysis of the microbial community structure and key functional genes allowed to identify the involved degradation pathways. Interestingly, when acetate was supplied along with toluene, to simulate the impact of a readily biodegradable substrate on process performance, toluene degradation was adversely affected, likely due to competitive inhibition effects. Overall, this study proved the efficacy of the developed bioelectrochemical system in simultaneously treating multiple groundwater contaminants, paving the way for the application in real-world scenarios.

Toluene-driven anaerobic biodegradation of chloroform in a continuous-flow bioelectrochemical reactor / Tucci, Matteo; Fernández-Verdejo, David; Resitano, Marco; Ciacia, Pamela; Guisasola, Albert; Blánquez, Paqui; Marco-Urrea, Ernest; CRUZ VIGGI, Carolina; Matturro, Bruna; Crognale, Simona; Aulenta, Federico. - In: CHEMOSPHERE. - ISSN 0045-6535. - 338:(2023), p. 139467. [10.1016/j.chemosphere.2023.139467]

Toluene-driven anaerobic biodegradation of chloroform in a continuous-flow bioelectrochemical reactor

Marco Resitano;Pamela Ciacia;Carolina Cruz Viggi;Federico Aulenta
2023

Abstract

: Subsurface co-contamination by multiple pollutants can be challenging for the design of bioremediation strategies since it may require promoting different and often antagonistic degradation pathways. Here, we investigated the simultaneous degradation of toluene and chloroform (CF) in a continuous-flow anaerobic bioelectrochemical reactor. As a result, 47 μmol L-1 d-1 of toluene and 60 μmol L-1 d-1 of CF were concurrently removed, when the anode was polarized at +0.4 V vs. Standard Hydrogen Electrode (SHE). Analysis of the microbial community structure and key functional genes allowed to identify the involved degradation pathways. Interestingly, when acetate was supplied along with toluene, to simulate the impact of a readily biodegradable substrate on process performance, toluene degradation was adversely affected, likely due to competitive inhibition effects. Overall, this study proved the efficacy of the developed bioelectrochemical system in simultaneously treating multiple groundwater contaminants, paving the way for the application in real-world scenarios.
2023
Bioremediation; Chloroform; Groundwater remediation; Microbial electrochemical technologies; Toluene
01 Pubblicazione su rivista::01a Articolo in rivista
Toluene-driven anaerobic biodegradation of chloroform in a continuous-flow bioelectrochemical reactor / Tucci, Matteo; Fernández-Verdejo, David; Resitano, Marco; Ciacia, Pamela; Guisasola, Albert; Blánquez, Paqui; Marco-Urrea, Ernest; CRUZ VIGGI, Carolina; Matturro, Bruna; Crognale, Simona; Aulenta, Federico. - In: CHEMOSPHERE. - ISSN 0045-6535. - 338:(2023), p. 139467. [10.1016/j.chemosphere.2023.139467]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1692791
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