Bioremediation Performance of Two Telluric Saprotrophic Fungi, Penicillium Brasilianum and Fusarium Solani , in Aged Dioxin-contaminated Soil Microcosms - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Soil and Sediment Contamination Année : 2021

Bioremediation Performance of Two Telluric Saprotrophic Fungi, Penicillium Brasilianum and Fusarium Solani , in Aged Dioxin-contaminated Soil Microcosms

Résumé

In this study, 28 strains of filamentous fungi were isolated from soil that were historically contaminated with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs; northern France). These fungal isolates were selected for their ability to use hexadecane as the sole carbon source and for hydrophobic molecule behavior. Six strains produced significant dry biomass (> 25 mg) on hexadecane: Paecilomyces carneus, Penicillium brasilianum, Absidia glauca, Lecanicillium lecanii, Mortierella minutissima, and Bionectria ochroleuca. In a second experiment, P. brasilianum and F. solani were tested for their ability to dissipate 17 PCDD/F congeners in non-sterile contaminated soil microcosms using olive oil as an unconventional carbon source. After two months of incubation, P. brasilianum significantly reduced the soils’ toxicity equivalency (TEQ) by 35%. The F. solani treatment led to a significant reduction (approximately 25%) in PCDD/F concentrations. Statistical agglomerative hierarchical clustering analysis indicated that using cardboard as a growing medium and bulking agent is more efficient than using poplar wood. As fungal dioxin dissipation can involve the production of reactive oxygen species or fungal P450-like enzymes, the potential role of these mechanisms deserve further study. However, the proposed approach could allow the development of cost-effective and eco-friendly (low technology) techniques to maintain the integrity of soils.
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Dates et versions

hal-04304863 , version 1 (24-11-2023)

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Isabelle Delsarte, Catherine Rafin, Etienne Veignie, Yann Landkocz. Bioremediation Performance of Two Telluric Saprotrophic Fungi, Penicillium Brasilianum and Fusarium Solani , in Aged Dioxin-contaminated Soil Microcosms. Soil and Sediment Contamination, 2021, 30 (6), pp.743-756. ⟨10.1080/15320383.2021.1890692⟩. ⟨hal-04304863⟩
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