大连近海沉积物多环芳烃污染特征及源解析

Pollution characteristics and source analysis of polycyclic aromatic hydrocarbons(PAHs) in surface sediment of Dalian

摘要: 本文对大连近海海域15个表层沉积物样品中16种多环芳烃(PAHs)污染特征及来源进行研究。结果表明,沉积物中16PAHs总浓度为30.0410-9~89.2410-9,平均值为50.8410-9,其中工业区显著高于城市地区(p0.05),极显著高于农村地区(p0.01)。沉积物中PAHs含量与总有机碳(TOC)含量间存在显著正相关性(p0.05),表明沉积物有机质含量是影响PAHs含量的主要因素。主成分分析得出,大连近海海域PAHs污染源为石油泄漏造成的石油源、生物质及化石燃料燃烧形成的燃烧源和燃油燃烧形成的交通源。

Abstract: To learn the pollution characteristics and source of PAHs in Dalian sea, 16 polycyclic aromatic hydrocarbons(PAHs) were analyzed in surface sediment samples collected from coastal. The results showed that the concentration of 16PAHs was 30.0410-9~89.2410-9 with the mean value of 50.8410-9.The concentrations of PAHs in industrial districts were higher significantly than those in urban(p0.05) and rural districts(p0.01).Significantly positive correlation between PAHs and TOC(p0.05) implied that the organic content was one important factor affecting the concentration of PAHs in sediment. The results of sources of PAHs analysis showed that the sources of PAHs were from crude oil, fossil and biomass burning and diesel fuel.