Polycyclic aromatic hydrocarbon-contaminated soils: bioaugmentation of autochthonous bacteria and toxicological assessment of the bioremediation process by means of Vicia faba L

Environmental Science and Pollution Research International
Monica Ruffini CastiglioneSimona Di Gregorio

Abstract

Two bacterial strains, Achromobacter sp. (ACH01) and Sphingomonas sp. (SPH01), were isolated from a heavily polycyclic aromatic hydrocarbon (PAH)-contaminated soil (5431.3 ± 102.3 ppm) for their capacity to use a mixture of anthracene, pyrene, phenanthrene and fluorene as sole carbon sources for growth and for the capacity to produce biosurfactants. The two strains were exploited for bioaugmentation in a biopile pilot plant to increase the bioavailability and the degradation of the residual PAH contamination (99.5 ± 7.1 ppm) reached after 9 months of treatment. The denaturing gel gradient electrophoresis (DGGE) profile of the microbial ecology of the soil during the experimentation showed that the bioaugmentation approach was successful in terms of permanence of the two strains in the soil in treatment. The bioaugmentation of the two bacterial isolates positively correlated with the PAH depletion that reached 7.9 ± 2 ppm value in 2 months of treatment. The PAH depletion was assessed by the loss of the phyto-genotoxicity of soil elutriates on the model plant Vicia faba L., toxicological assessment adopted also to determine the minimum length of the decontamination process for obtaining both the depletion of the PAH contamination...Continue Reading

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Nov 24, 2016·Environmental Science and Pollution Research International·Sandra SanchesMaria Teresa Barreto Crespo
Sep 13, 2017·Frontiers in Microbiology·Alejandro Gran-ScheuchJosé M Pérez-Donoso
Jan 8, 2020·Critical Reviews in Biotechnology·Sajjad AsafAhmed Al-Harrasi
Jun 20, 2020·Environmental Science and Pollution Research International·Ilaria ChiccaDavid B Levin
Aug 25, 2017·Environmental Science & Technology·Cleo L Davie-MartinStaci L Massey Simonich
Aug 28, 2021·International Journal of Environmental Research and Public Health·Xingchun LiYu Li

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