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环境化学  2015 

北京市西北郊大气气溶胶中多环芳烃的源解析

Keywords: 多环芳烃,气溶胶,北京市

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Abstract:

用气相色谱-质谱技术对北京市西北郊2005-2006年大气气溶胶样品中的多环芳烃进行分析检测,并运用比值法、主成分分析/多元线性回归和正矩阵因子分解对多环芳烃的来源进行解析主成分分析/多元线性回归表明,机动车尾气、燃煤和生物质燃烧的贡献率分别为70.27%,21.84%和7.89%.正矩阵因子分解表明,汽油车的贡献较大,且各个季节都占优势;冬季燃煤的贡献增加,秋季生物质燃烧的贡献增大.多环芳烃的比值表明其主要来自于本地源.

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