Electrobioremediation technologies hold considerable potential for the treatment of soils contaminated by petroleum hydrocarbons (PH), since they allow stimulating biodegradation processes with no need for subsurface chemicals injection and with little to no energy consumption. Here, a microbial electrochemical snorkel (MES) was applied for the treatment of a soil contaminated by hydrocarbons. The MES consists of direct coupling of a microbial anode with a cathode, being a single conductive, non-polarized material positioned suitably to create an electrochemical connection between the anoxic zone (the contaminated soil) and the oxic zone (the overlying oxygenated water). Soil was also supplemented with electrically conductive particles of biochar as a strategy to construct a conductive network with microbes in the soil matrix, thus extending the radius of influence of the snorkel. The results of a comprehensive suite of chemical, microbiological and ecotoxicological analyses evidenced that biochar addition, rather than the presence of a snorkel, was the determining factor in accelerating PH removal from contaminated soils, possibly accelerating syntrophic and/or cooperative metabolisms involved in the degradation of PH. The enhancement of biodegradation was mirrored by an increased abundance of anaerobic and aerobic microorganisms known to be involved in the degradation of PH and related functional genes. Plant ecotoxicity assays confirmed a reduction of soils toxicity in treatments receiving electrically conductive biochar.

Passive electrobioremediation approaches for enhancing hydrocarbons biodegradation in contaminated soils / Viggi, C. C.; Tucci, M.; Resitano, M.; Matturro, B.; Crognale, S.; Feigl, V.; Molnar, M.; Rossetti, S.; Aulenta, F.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 845:(2022). [10.1016/j.scitotenv.2022.157325]

Passive electrobioremediation approaches for enhancing hydrocarbons biodegradation in contaminated soils

Resitano M.;Aulenta F.
2022

Abstract

Electrobioremediation technologies hold considerable potential for the treatment of soils contaminated by petroleum hydrocarbons (PH), since they allow stimulating biodegradation processes with no need for subsurface chemicals injection and with little to no energy consumption. Here, a microbial electrochemical snorkel (MES) was applied for the treatment of a soil contaminated by hydrocarbons. The MES consists of direct coupling of a microbial anode with a cathode, being a single conductive, non-polarized material positioned suitably to create an electrochemical connection between the anoxic zone (the contaminated soil) and the oxic zone (the overlying oxygenated water). Soil was also supplemented with electrically conductive particles of biochar as a strategy to construct a conductive network with microbes in the soil matrix, thus extending the radius of influence of the snorkel. The results of a comprehensive suite of chemical, microbiological and ecotoxicological analyses evidenced that biochar addition, rather than the presence of a snorkel, was the determining factor in accelerating PH removal from contaminated soils, possibly accelerating syntrophic and/or cooperative metabolisms involved in the degradation of PH. The enhancement of biodegradation was mirrored by an increased abundance of anaerobic and aerobic microorganisms known to be involved in the degradation of PH and related functional genes. Plant ecotoxicity assays confirmed a reduction of soils toxicity in treatments receiving electrically conductive biochar.
2022
biochar; bioelectrochemical system; bioremediation; contaminated soil; microbial electrochemical snorkel; petroleum hydrocarbons
01 Pubblicazione su rivista::01a Articolo in rivista
Passive electrobioremediation approaches for enhancing hydrocarbons biodegradation in contaminated soils / Viggi, C. C.; Tucci, M.; Resitano, M.; Matturro, B.; Crognale, S.; Feigl, V.; Molnar, M.; Rossetti, S.; Aulenta, F.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 845:(2022). [10.1016/j.scitotenv.2022.157325]
File allegati a questo prodotto
File Dimensione Formato  
Viggi_Passive-electrobioremediation_2022.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.36 MB
Formato Adobe PDF
2.36 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1661831
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 9
social impact