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 17 h 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 (Nc > 15) are those which most decrease the rate of [HC] removal.
Hydrocarbon removal from bilgewater by a combination of air-stripping and photocatalysis
Journal of Hazardous Materials ; 235/236 ; 159-168
2012
10 Seiten, 10 Bilder, 3 Tabellen, 36 Quellen
Aufsatz (Zeitschrift)
Englisch
Dry Stripping Paint Removal System
Emerald Group Publishing | 1988
Selective Stripping (Topcoat Removal Only) Using 10,000 psi Water
British Library Conference Proceedings | 1998
|Removal of Low Concentration NO~x in Ambient Air by Photocatalysis
British Library Online Contents | 1996
|Selective Stripping (Topcoat Removal Only) Using 10,000 psi Water
SAE Technical Papers | 1998
|Stripping Epoxies from Magnesium
Emerald Group Publishing | 1963
|