Polycyclic aromatic hydrocarbons and their derivatives in sediments from the Okinawa Trough and South China Sea: Occurrence, sources, profiles, and implications for anthropogenic activities

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2025-02-01 DOI:10.1016/j.csr.2025.105406

Jin-Yun Li , Ye-Yang Hou , Wan-Jun Liao , Ying Guo , Yong He , Liang-Ying Liu

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Abstract

Sediments from the Middle Okinawa Trough (MOT) and Southwest Basin were analyzed for polycyclic aromatic hydrocarbons (PAHs) and their halogenated and nitrated derivatives. No halogenated PAHs were detected, whereas 6 nitrated PAHs were observed in three samples from the MOT (0.960−6.46 ng/g). The concentrations of Σ₁₈PAH in the sediment of the MOT (average124 ng/g) were statistically higher than those of the Southwest Basin (39.7 ng/g). The MOT sediments were dominated by 4−5-ring PAHs, whereas the Southwest Basin sediments were dominated by 3-ring PAHs. The regional differences in concentrations and composition profiles were likely due to the different patterns of regional environmental and/or anthropogenic factors, e.g., climate and energy consumption. Sedimentary PAHs in the MOT were primarily derived from petroleum and/or petroleum combustion, while those in the Southwest Basin were mainly from petroleum. The findings suggest that environmental management and pollution control strategies should consider the specific pollution source in different regions.

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.