南京师大学报（自然科学版）2025，Vol.48Issue(3)：10-20,11.DOI:10.3969/j.issn.1001-4616.2025.03.002
长江上游农业区河流沉积物多环芳烃的赋存特征、来源及其风险
Occurrence Characteristics,Sources,and Risks of Polycyclic Aromatic Hydrocarbons in River Sediments of Argicultural Region in Upper Reaches of the Yangtze River
摘要
Abstract
With the rapid social and economic development in the Yangtze River Basin,polycyclic aromatic hydrocarbons(PAHs)caused by human activities have gradually accumulated in environmental media such as water bodies,sediments,and aerosols,resulting in increasing environmental pollution and posing harm to the surrounding ecological environment and human health.To investigate the occurrence characteristics,sources,and ecological risks of PAHs in river sediments of typical agricultural areas in the upper reaches of the Yangtze River,surface sediments of rivers in Yongchuan District,Chongqing,are selected as the research objects.High-performance liquid chromatography is used to detect the concentration of 16 PAHs in the sediments,and methods such as characteristic ratio analysis,principal component analysis,effect interval values,and benzo[a]pyrene toxic equivalency quotient(TEQBaP)are employed for source apportionment and ecological risk assessment.The results show that:①The level of PAHs pollution in urban river segments is significantly higher than that in agricultural river segments.②Combustion of biomass,coal,and liquid fossil fuels is identified as the main source of PAHs in this region.③All individual PAHs exceed the effect range-low value,and more than half of them exceed the effect range-median value,posing a considerable ecological risk.The findings of this study provide theoretical guidance and technical support for the pollution control and ecological risk assessment of PAHs in river sediments in agricultural areas of Chongqing and are of significant practical importance for protecting the ecological environment of the Yangtze River Basin.关键词
沉积物/多环芳烃/赋存特征/生态风险Key words
sediment/polycyclic aromatic hydrocarbons/occurrence characteristics/ecological risk分类
环境科学引用本文复制引用
张明礼,吴含芝,王延华,郭佳怡..长江上游农业区河流沉积物多环芳烃的赋存特征、来源及其风险[J].南京师大学报（自然科学版）,2025,48(3):10-20,11.基金项目
国家重点研发计划专项(2021YFC3201502). （2021YFC3201502）
