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土壤中多环芳烃的分布特征及其来源分析

Keywords: 多环芳烃,土壤,污染特征,来源

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Abstract:

利用气相色谱法分析了南充市10个不同功能区表层土壤中美国环保署规定的16种优控多环芳烃(PAHs)的含量和组分特征,运用同分异构体比率揭示了其污染来源。研究表明,该区土壤中PAHs的含量在9.1~2269.1μg·kg-1之间,而且工业区的残留量大于农业区和居民区的残留量。按PAHs的环数来分,在工业污染区PAHs的含量总的趋势是四环>二环>三环>五环>六环;农业和居民区二环>三环>五环>四环>六环。该污染状况与国内外相关研究比较,处于中等污染水平。煤、木材和化石的燃烧是该地区土壤中PAHs污染的主要来源,苯并(a)蒽和菲是主要的超标化合物。

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