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Article Dans Une Revue Journal of Hazardous Materials Année : 2012

Hydrocarbon removal from bilgewater by a combination of air-stripping and photocatalysis

D. Cazoir
  • Fonction : Auteur
AIR
L. Fine
  • Fonction : Auteur
AIR
C. Ferronato
J. M. Chovelon
EAU

Résumé

In order to prevent hydrocarbon discharge at sea from the bilge of ships, the International Maritime Organization (IMO) enacted the MARPOL 73/78 convention in which effluents are now limited to those with maximum oil content of 15 ppmv. Thus, photocatalysis and air-stripping were combined for the hydrocarbon removal from a real oily bilgewater sample and an original monitoring of both aqueous and gaseous phases was performed by GC/MS to better understand the process. Our results show that the hydrocarbon oil index [HC] can be reduced to its maximum permissible value of 15 ppmv (MARPOL) in only 8.5 h when photocatalysis and air-stripping are used together in a synergistic way, as against 17h when photocatalysis is used alone. However, this air-assisted photocatalytic process emits a large quantity of volatile organic compounds (VOC) and, within the first four hours, ca. 10% of the hydrocarbon removal in the aqueous phase is actually just transferred into the gaseous one. Finally, we highlight that the n-alkanes with a number of carbon atoms higher than 15 (N-C > 15) are those which most decrease the rate of [HC] removal.
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hal-00752588 , version 1 (25-05-2021)

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D. Cazoir, L. Fine, C. Ferronato, J. M. Chovelon. Hydrocarbon removal from bilgewater by a combination of air-stripping and photocatalysis. Journal of Hazardous Materials, 2012, 235-236, pp.159-168. ⟨10.1016/j.jhazmat.2012.07.037⟩. ⟨hal-00752588⟩
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