【摘 要】
：
根据实际情况,把天津地区划分为5个地区单元,通过现场采样及室内分析测试,研究了各单元表层土壤多环芳烃的分区特征.结果表明,在划分的5个单元区中,PAHs总浓度及各组分浓度基
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根据实际情况,把天津地区划分为5个地区单元,通过现场采样及室内分析测试,研究了各单元表层土壤多环芳烃的分区特征.结果表明,在划分的5个单元区中,PAHs总浓度及各组分浓度基本上均符合市区＞近郊区＞滨海区＞郊县＞远郊县这样的分布规律.在天津的5类地区单元中,土壤PAHs污染物成分谱基本相同.其中,前3类地区(同属于城市化水平高的地区)的成分谱尤为接近;郊县和远郊县的成分谱与前3类地区略有不同,除Nap的高值外,次高值区为Bbf、Bkf和Bap,而不是前3类中的Phe和Fla.此外,PAHs含量大小与各地的单位面积工业总产值的自然对数呈显著正相关,样本可决系数r2=0.898 3.这表明,工业化和城市化水平是决定天津地区表土中PAHs含量的重要的社会经济因素.
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