Bordas, François; Lafrance, Pierre et Villemur, Richard 
ORCID: https://orcid.org/0000-0001-9768-8937
(2005).
Conditions for effective removal of pyrene from an artificially contaminated soil using Pseudomonas aeruginosa 57SJ rhamnolipids
Environmental Pollution
, vol. 138
, nº 1.
pp. 69-76.
DOI: 10.1016/j.envpol.2005.02.017.
Résumé
The efficacy of a new rhamnolipid biosurfactants mixture to enhance the removal of pyrene from a soil artificially contaminated was investigated. The molar solubilization ratio (MSR) and the partition coefficient between the micelles and water (log Km) were found to be 7.5 X 10(-3) and 5.7, respectively. From soil column studies, the pyrene removal increased linearly with the concentration of the injected biosurfactants solution above the effective critical micellar concentration (0.4 g L-1). Flushing with a 5.0 g L-1 biosurfactants solution increased the pyrene concentration in the effluent by 178 times. At high biosurfactants' concentrations (2.5 and 5.0 g L-1), the cumulative pyrene recovery reached 70%. This pyrene remobilization takes place independently of the soil organic carbon solubilization. This study provides a combination of batch and column experiments in order to find the conditions for effective soil remediation using a new rhamnolipids mixture.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Biosurfactants; Pyrene; Soil; Mobilization; PAH |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 31 oct. 2024 01:10 |
| Dernière modification: | 31 oct. 2024 01:10 |
| URI: | https://espace.inrs.ca/id/eprint/14426 |
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