Article (Scientific journals)
Temporal evolution of PAHs bioaccessibility in an aged-contaminated soil during the growth of two Fabaceae.
Davin, Marie; Renard, Elisa; Lefébure, Kévin et al.
2020In International Journal of Environmental Research and Public Health, 17 (11), p. 4016
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Keywords :
polycyclic aromatic hydrocarbons (PAHs); bioaccessibility; rhizoremediation; aged soil; Medicago sativa L.; Trifolium pratense L.
Abstract :
[en] Polycyclic aromatic hydrocarbons (PAHs) are health-concerning organic compounds that accumulate in the environment. Bioremediation and phytoremediation are studied to develop eco-friendly remediation techniques. In this study, the e ects of two plants (Medicago sativa L. and Trifolium pratense L.) on the PAHs’ bioaccessibility in an aged-contaminated soil throughout a long-term rhizoremediation trial was investigated. A bioaccessibility measurement protocol, using Tenax® beads, was adapted to the studied soil. The aged-contaminated soil was cultured with each plant type and compared to unplanted soil. The bioaccessible and residual PAH contents were quantified after 3, 6 and 12 months. The PAHs’ desorption kinetics were established for 15 PAHs and described by asite distribution model. A common Tenax® extraction time (24 h) was established as a comparison basis for PAHs bioaccessibility. The rhizoremediation results show that M. sativa developed better than T. pratense on the contaminated soil. When plants were absent (control) or small (T. pratense), the global PAHs’ residual contents dissipated from the rhizosphere to 8% and 10% of the total initial content, respectively. However, in the presence of M. sativa, dissipation after 12 months was only 50% of the total initial content. Finally, the PAHs’ bioaccessible content increased more significantly in the absence of plants. This one-year trial brought no evidence that the presence of M. sativa or T. pratenseon this tested aged-contaminated soil was beneficial in the PAH remediation process, compared to unplanted soil.
Disciplines :
Agriculture & agronomy
Environmental sciences & ecology
Author, co-author :
Davin, Marie ;  Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
Renard, Elisa
Lefébure, Kévin ;  Université de Liège - ULiège > Département GxABT > Echanges Eau-Sol-Plantes
Fauconnier, Marie-Laure   ;  Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
Colinet, Gilles   ;  Université de Liège - ULiège > Département GxABT > Echanges Eau-Sol-Plantes
 These authors have contributed equally to this work.
Language :
English
Title :
Temporal evolution of PAHs bioaccessibility in an aged-contaminated soil during the growth of two Fabaceae.
Publication date :
June 2020
Journal title :
International Journal of Environmental Research and Public Health
ISSN :
1660-4601
eISSN :
1661-7827
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Switzerland
Volume :
17
Issue :
11
Pages :
art.4016
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 June 2020

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