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采集海河和渤海表层沉积物样品,测定16种EPA规定多环芳烃.海河∑PAH含量(干重)范围为445～2185ng.g-1,平均值为964ng.g-1;渤海∑PAH含量范围为171～290ng.g-1,平均值为226ng.g-1.海河塘沽区段和天津市区段沉积物中∑PAH含量比郊区段含量高.LMW/HMW(低分子质量/高分子质量)和异构体比值分析表明,生物质及煤的燃烧为海河表层沉积物中PAHs主要来源;对于渤海湾大部分区域来说,石油污染是其PAHs的主要来源,而热解来源的PAHs主要以生物质及煤的燃烧为主;滨海旅游度假村附近海域因受旅游活动影响而燃烧源的贡献较大.风险评价表明,海河及部分渤海海域存在潜在生态危害,滨海村附近海域存在潜在生态风险可能性较低.
Samples of surface sediments from the Haihe River and Bohai Sea were collected and 16 EPA-specified polycyclic aromatic hydrocarbons (PAHs) were determined.The ΣPAH content (dry weight) of Haihe River ranged from 445 to 2185ng.g-1 with an average value of 964ng.g-1, The average ΣPAH content of Tanghe section of Haihe River and Tianjin section was higher than that of suburban section.LMW / HMW (low molecular weight / high molecular weight ) And isomer ratio analysis showed that the combustion of biomass and coal was the main source of PAHs in the surface sediments of Haihe River. For most of the Bohai Bay area, petroleum pollution was the main source of PAHs, while PAHs from pyrolysis were mainly Which is dominated by the burning of biomass and coal, and the sea area near Binhai Holiday Resort contributes more to the combustion source due to the impact of tourism activities.Risk evaluation shows that there is potential ecological risk in Haihe River and part of Bohai Sea, and there is potential ecological risk in waters near Binhai Village Less likely.