EPA-34 PAHs及其羟基化降解产物在珠江河口不同环境介质中的分布及迁移转化规律

Estuary is considered as a transition area which connects the terrestrial and marine ecosystems.Organic contaminants such as Polycyclic aromatic hydrocarbons (PAHs) could enter the estuary through surface runoff, creating long-term adverse effects on the costal resources. In this study, EPA-34 PAHs and their hydroxylated metabolites would be selected as the target compounds, whaereas the Pearl River Estuary (PRE) and Humen estuary would be selected as the sampling and studying area. Based on the development of analytical methods in complex environmental matrix, EPA-34 and their hydroxylated metabolites would be determined to investigate their source and spatial distributions. Moreover, the emphases of this study would be addressed on the monthly variation and estuarine behaviors (including input, output and vertical exchange) of EPA-34 PAHs and their hydroxylated metabolites in different environmental matrix of Humen estuary, especially in the aqueous phae and suspened particular matter (SPM). Obviously, this study would improve our in-depth understanding of the fate of PAHs in complex estuarine environment, and provide theoretical and pratical basis for PAHs control and remediation in estuarine and costal environments.

河口环境是连接陆地生态系统以及海洋生态系统的特殊过度区域，多环芳烃（PAHs）经河口特殊的环境过程后可随大洋环流参与全球循环，从而对海洋环境及生态系统产生影响。本项目主要是以EPA-34 PAHs及其羟基化降解产物作为主要研究对象，以珠江河口区域以及其中最具代表性的虎门河口作为研究区域，在建立复杂样品基质中EPA-34 PAHs及其羟基化降解产物分析方法的基础上，调查EPA-34 PAHs及其羟基化降解产物在珠江河口及南海北部海域表层沉积物中的分布特征及污染来源，并且以虎门河口作为代表，重点探讨EPA-34 PAHs及其羟基化降解产物的在水相不同介质（水样及悬浮颗粒物）中的逐月变化规律，以便揭示其输入、输出、垂向交换等河口行为。因此，项目的开展可为深入了解PAHs在复杂河口环境中的迁移转化规律以及PAHs的污染治理与修复提供科学与实践依据。

河口环境是连接陆地生态系统以及海洋生态系统的特殊过度区域，有机污染物经河口特殊的环境过程后可随大洋环流参与全球循环，从而对海洋环境及生态系统产生影响。本项目以多环芳烃（PAHs）及其降解产物、有机磷酸酯（OPEs）等作为主要研究对象，以珠江河口区域作为研究区域，建立了复杂样品基质中待测组分准确、快速的分析方法，调查了EPA-34 PAHs及其降解产物、OPEs在珠江河口及南海北部海域表层沉积物中的分布特征、污染来源以及污染通量，并且以虎门河口作为代表，重点探讨EPA-34 PAHs在水相不同介质中的月份及垂直变化规律，证明了河流输入为主要污染来源，并且大颗粒的悬浮颗粒物时污染物迁移的主要载体。已发表标注的SCI论文11篇，其中第一作者/通讯作者论文6篇。