Concentration,composition and sources of PAHs in the coastal sediments of the exclusive economic zone (EEZ) of Qatar,Arabian Gulf |
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| Authors: | YS Soliman EMS Al Ansari TL Wade |
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| Institution: | 1. Department of Biological and Environmental Science, Qatar University, Doha, Qatar;2. Environmental Studies Center, Qatar University, Doha, Qatar;3. Geochemical and Environmental Research Group, Texas A&M University, College Station, TX, United States |
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| Abstract: | Surface sediments were collected from sixteen locations in order to assess levels and sources of polycyclic aromatic hydrocarbons (PAHs) in sediments of Qatar exclusive economic zone (EEZ). Samples were analyzed for 16 parent PAHs, 18 alkyl homologs and for dibenzothiophenes. Total PAHs concentration (∑PAHs) ranged from 2.6 ng g−1 to 1025 ng g−1. The highest PAHs concentrations were in sediments in and adjacent to harbors. Alkylated PAHs predominated most of the sampling locations reaching up to 80% in offshore locations. Parent PAHs and parent high molecular weight PAHs dominated location adjacent to industrial activities and urban areas. The origin of PAHs sources to the sediments was elucidated using ternary plot, indices, and molecular ratios of specific compounds such as (Ant/Phe + Ant), (Flt/Flt + Pyr). PAHs inputs to most coastal sites consisted of mixture of petroleum and combustion derived sources. However, inputs to the offshore sediments were mainly of petroleum origin. |
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| Keywords: | Arabian Gulf PAHs Sediments Sources Composition |
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