Crude vs. condensate: Contrasting pollution trajectories and management implications from two major oil spills in China's marine ecosystems.

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2025-09-30 DOI:10.1016/j.marenvres.2025.107594

Chuanyuan Wang, Ping Guo, Jianhui Tang, Haijiang Zhang

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引用次数: 0

Abstract

Oil spills increasingly imperil China's marine ecosystems, with the Sanchi (condensate oil) and Dalian (crude oil) incidents exhibiting distinct pollution dynamics. This study integrates spatial analysis, chemometric source apportionment (HCA-PCA), and ecological risk assessment to compare polycyclic aromatic hydrocarbons (PAHs) contamination in surface sediments. Results reveal Dalian's PAHs cluster in industrial zones, likely from historical combustion sources, while Sanchi shows radial declines from the wreck, reflecting condensate oil volatilization. Source analysis identifies uniform combustion origins for Dalian and mixed inputs from heavy fuel oil weathering and combustion for Sanchi. Despite overall PAHs levels below ER-L thresholds, Sanchi's heavy fuel oil-derived 5-6 ring PAHs require continuous monitoring. Toxic equivalent (TEQ_BaP) analysis highlights site-specific risks, underscoring the need to prioritize TEQ metrics over total PAHs concentrations for accurate risk assessment and targeted marine environmental management. The complex interplay between the spill - derived PAHs and pre - existing industrial pollution implies that remediation efforts must consider both acute and chronic contamination sources.

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原油与凝析油：对比中国海洋生态系统中两次主要石油泄漏的污染轨迹和管理启示。

石油泄漏日益危及中国的海洋生态系统，三池（凝析油）和大连（原油）事件显示出明显的污染动态。本研究采用空间分析、化学计量源分析（HCA-PCA）和生态风险评价相结合的方法，对表层沉积物中多环芳烃（PAHs）污染进行了比较。结果显示，大连的多环芳烃聚集在工业区，可能来自历史燃烧源，而桑池则显示出残骸的径向下降，反映了凝析油的挥发。来源分析确定了大连的均匀燃烧来源和桑吉的重质燃料油风化和燃烧的混合输入。尽管总体多环芳烃含量低于ER-L阈值，但Sanchi的重质燃料油衍生的5-6环多环芳烃仍需要持续监测。毒性当量（TEQBaP）分析强调了特定地点的风险，强调需要优先考虑TEQ指标，而不是总多环芳烃浓度，以便进行准确的风险评估和有针对性的海洋环境管理。泄漏产生的多环芳烃与先前存在的工业污染之间复杂的相互作用意味着修复工作必须考虑急性和慢性污染源。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.