کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5757553 | 1622719 | 2017 | 15 صفحه PDF | دانلود رایگان |
- TOC, AHs and PAHs ranged 2-12%, 8-174 μg gâ 1 sed. dw and 175-10,769 ng gâ 1 sed. dw.
- Lowest concentrations in the Sfax-Kerkennah channel, highest ones in the Sfax harbor
- Decoupling between TOC, AH and PAH contents
- TOC/N and δ13C values revealed a mixed origin of OM with marine and terrestrial sources.
- Dominance of petrogenic AHs and presence of both petrogenic and pyrogenic PAHs
We investigated the origin and distribution of aliphatic and polycyclic aromatic hydrocarbons (AHs and PAHs) and organic matter (OM) in surficial sediments of the Sfax-Kerkennah channel in the Gulf of Gabès (Tunisia, Southern Mediterranean Sea). TOC, AH and PAH concentrations ranged 2.3-11.7%, 8-174 μg gâ 1 sed. dw and 175-10,769 ng gâ 1 sed. dw, respectively. The lowest concentrations were recorded in the channel (medium sand sediment) and the highest ones in the Sfax harbor (very fine sand sediment). AHs, PAHs and TOC were not correlated for most of the stations. TOC/N and δ13C values revealed a mixed origin of OM with both marine and terrestrial sources. Hydrocarbon molecular composition highlighted the dominance of petrogenic AHs and the presence of both petrogenic and pyrogenic PAHs, associated with petroleum products and combustion processes. This work underscores the complex distribution patterns and the multiple sources of OM and hydrocarbons in this highly anthropogenized coastal environment.
Journal: Marine Pollution Bulletin - Volume 117, Issues 1â2, 15 April 2017, Pages 414-428