Sequential Anaerobic/Aerobic Microbial Transformation of Chlorinated Ethenes: Use of Sustainable Approaches for Aquifer Decontamination
Articolo
Data di Pubblicazione:
2023
Citazione:
Sequential Anaerobic/Aerobic Microbial Transformation of Chlorinated Ethenes: Use of Sustainable Approaches for Aquifer Decontamination / M. Bertolini, S. Zecchin, L. Cavalca. - In: WATER. - ISSN 2073-4441. - 15:7(2023 Mar), pp. 1406.1-1406.22. [10.3390/w15071406]
Abstract:
Chlorinated ethene contamination is a worldwide relevant health issue. In anaerobic
aquifers, highly chlorinated ethenes are transformed by microbially-mediated organohalide respi-
ration metabolism. For this reason, in the last few years, bioremediation interventions have been
developed and employed in situ for aquifer decontamination. Biostimulation has been demonstrated
to be efficient in enhancing organohalide respiration activity. The use of agrifood wastes that replace
engineered substrates as biostimulants permits the low carbon impact of bioremediation treatment
as part of a circular economy approach. The present work depicts the effects of available bio-based
substrates and discusses their efficiency and impact on microbial communities when applied to con-
taminated aquifers. As a drawback of anaerobic organohalide respiration, there is the accumulation
of more toxic lower-chlorinated ethenes. However, compounds such as dichloroethene (DCE) and
vinyl chloride (VC) can be mineralized by metabolic and co-metabolic pathways in aerobic condi-
tions. For this reason, sequential anaerobic/aerobic treatments proposed to stimulate the natural
biotransformation activity can achieve complete degradation of chlorinated ethenes. The aim of this
work is to provide an up-to-date revision of anaerobic/aerobic microbial transformation pathways
towards chlorinated ethenes and to discuss their application in real scenarios and futurable microbial
bioelectrochemical systems to remediate contaminated aquifers.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
chloroethenes; microbial bioremediation; organohalide respiration; VC aerobic biodegradation; bio-based substrates
Elenco autori:
M. Bertolini, S. Zecchin, L. Cavalca
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