北京市东郊河流水中多环芳烃的分布

来源 :第十一届中日水环境研讨会 | 被引量 : 0次 | 上传用户:lyfwgc2005
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  采用固相萃取-GC/MS测定北京市9条河流的水样中的多环芳烃(PAHs),并对其分布特征和来源进行了分析.结果显示:16种US EPA优控的PAHs均有不同程度的检出,水样中PAHs以2~3环的PAHs为主,占PAHs总量的63.1%-86.8%;水样中PAHs的含量范围为176~1425ng/L,其中坝河水样中PAHs含量最高,北运河的最低;市内河流PAHs的污染较郊外河流严重,主要与人类活动,尤其是汽车尾气的排放有关;市内河流通惠河、坝河上游采样点PAHs要明显高于下游,可能与河流稀释作用有关;位于郊外的北运河、潮白河、潮河和白河上游含量要低于下游,很可能与沿途排污及地表径流有关.PAHs的污染来源主要是生活服务区的高温燃烧和汽车尾气带来的石油源污染.
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