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Sources of the Elevating Polycyclic Aromatic Hydrocarbon Pollution in the Western South China Sea and Its Environmental Implications
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2023-11-01 , DOI: 10.1021/acs.est.3c03452 Minwei Han 1 , Kefu Yu 1, 2 , Ruijie Zhang 1, 2 , Biao Chen 1 , Haolan Li 1 , Zheng-En Zhang 3 , Jun Li 3 , Gan Zhang 3
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2023-11-01 , DOI: 10.1021/acs.est.3c03452 Minwei Han 1 , Kefu Yu 1, 2 , Ruijie Zhang 1, 2 , Biao Chen 1 , Haolan Li 1 , Zheng-En Zhang 3 , Jun Li 3 , Gan Zhang 3
Affiliation
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The environmental implications of polycyclic aromatic hydrocarbons (PAHs) caused by the vigorous development of offshore oil exploitation and shipping on the marine ecosystem are unclear. In this study, the PAH concentrations were systematically characterized in multiple environmental media (i.e., atmosphere, rainwater, seawater, and deep-sea sediments) in the western South China Sea (WSCS) for the first time to determine whether PAH pollution increased. The average ∑15PAHs (total concentration of 15 US EPA priority controlled PAHs excluding naphthalene) in the water of WSCS has increased and is higher than the majority of the oceans worldwide due to the synergistic influence of offshore oil extraction, shipping, and river input. The systematic model comparison confirms that the Ksoot-air model can more accurately reflect the gas-particle partitioning of PAHs in the atmosphere of the WSCS. We also found that the vertical migration of the elevating PAHs is accelerated by particulate matter, driving the migration of atmospheric PAHs to the ocean through dry and wet deposition, with 16% being contributed by the particle phase. The particulate matter sinking alters the PAH distribution in the water column and generates variation in source apportionment, while the contribution of PAHs loaded on them (>20%) to the total PAH reserves cannot be ignored as before. Hence, the ecological threat of PAHs increases by the oil drilling and shipping industry, and the driving force of particulate matter deserves continuous attention.
中文翻译：
南海西部多环芳烃污染加剧的来源及其环境影响
海洋石油开采和航运的蓬勃发展所产生的多环芳烃（PAHs）对海洋生态系统的环境影响尚不清楚。本研究首次系统地表征了南海西部地区多种环境介质（即大气、雨水、海水和深海沉积物）中的PAH浓度，以确定PAH污染是否增加。由于近海石油开采、航运和河流输入的协同影响，WSCS水中的平均Σ 15 PAHs（除萘之外的15种美国EPA优先控制的PAHs总浓度）有所增加，并高于全球大多数海洋。系统模型比较证实K烟灰-空气模型能够更准确地反映WSCS大气中PAHs的气体-颗粒分配情况。我们还发现，颗粒物加速了PAHs的垂直迁移，驱动大气中的PAHs通过干沉降和湿沉降迁移到海洋，其中颗粒相贡献了16%。颗粒物下沉改变了水体中PAH的分布，产生了源解析的变化，而其上负载的PAHs（>20%）对PAH总储量的贡献仍然不能像以前那样被忽视。因此，石油钻探和航运业对PAHs的生态威胁日益加大，颗粒物的驱动力值得持续关注。
更新日期：2023-11-01
中文翻译：
南海西部多环芳烃污染加剧的来源及其环境影响
海洋石油开采和航运的蓬勃发展所产生的多环芳烃（PAHs）对海洋生态系统的环境影响尚不清楚。本研究首次系统地表征了南海西部地区多种环境介质（即大气、雨水、海水和深海沉积物）中的PAH浓度，以确定PAH污染是否增加。由于近海石油开采、航运和河流输入的协同影响，WSCS水中的平均Σ 15 PAHs（除萘之外的15种美国EPA优先控制的PAHs总浓度）有所增加，并高于全球大多数海洋。系统模型比较证实K烟灰-空气模型能够更准确地反映WSCS大气中PAHs的气体-颗粒分配情况。我们还发现，颗粒物加速了PAHs的垂直迁移，驱动大气中的PAHs通过干沉降和湿沉降迁移到海洋，其中颗粒相贡献了16%。颗粒物下沉改变了水体中PAH的分布，产生了源解析的变化，而其上负载的PAHs（>20%）对PAH总储量的贡献仍然不能像以前那样被忽视。因此，石油钻探和航运业对PAHs的生态威胁日益加大，颗粒物的驱动力值得持续关注。
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