Skip to Main content Skip to Navigation
Journal articles

Bioremediation of PAH-contaminated soils: Consequences on formation and degradation of polar-polycyclic aromatic compounds and microbial community abundance

Abstract : A bioslurry batch experiment was carried out over five months on three polycyclic aromatic compound (PAC) contaminated soils to study the PAC (PAH and polar-PAC) behavior during soil incubation and to evaluate the impact of PAC contamination on the abundance of microbial communities and functional PAH-degrading populations. Organic matter characteristics and reactivity, assessed through solvent extractable organic matter and PAC contents, and soil organic matter mineralization were monitored during 5 months. Total bacteria and fungi, and PAH-ring hydroxylating dioxygenase genes were quantified. Results showed that PAHs and polar-PACs were degraded with different degradation dynamics. Differences in degradation rates were observed among the three soils depending on PAH distribution and availability. Overall, low molecular weight compounds were preferentially degraded. Degradation selectivity between isomers and structurally similar compounds was observed which could be used to check the efficiency of bioremediation processes. Bacterial communities were dominant over fungi and were most likely responsible for PAC degradation. Abundance of PAH-degrading bacteria increased during incubations, but their proportion in the bacterial communities tended to decrease. The accumulation of some oxygenated-PACs during the bioslurry experiment underlines the necessity to monitor these compounds during application of remediation treatment on PAH contaminated soils.
Complete list of metadata

Cited literature [66 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/hal-01698413
Contributor : Coralie Biache <>
Submitted on : Thursday, February 1, 2018 - 11:32:15 AM
Last modification on : Wednesday, May 5, 2021 - 9:40:03 AM
Long-term archiving on: : Wednesday, May 2, 2018 - 2:42:29 PM

File

Biache et al, 2017_postprintHA...
Files produced by the author(s)

Identifiers

Citation

Coralie Biache, Salma Ouali, Aurélie Cébron, Catherine Lorgeoux, Stéfan Colombano, et al.. Bioremediation of PAH-contaminated soils: Consequences on formation and degradation of polar-polycyclic aromatic compounds and microbial community abundance. Journal of Hazardous Materials, Elsevier, 2017, 329, pp.1 - 10. ⟨10.1016/j.jhazmat.2017.01.026⟩. ⟨hal-01698413⟩

Share

Metrics

Record views

269

Files downloads

882