摘要
于采暖期(2020年12月)和非采暖期(2021年4月)在沈阳市采集大气PM_(2.5)样品,分析其所含重金属的浓度特征、空间分布与来源。结果表明,采暖期重金属浓度依次为Zn>Pb>As>Cu>Cr>Cd>Hg;非采暖期依次为Zn>Pb>Cr>Cu>As>Cd>Hg;采暖期采样点U,S,N的重金属含量普遍较高,非采暖期采样点T,U,N较高;PMF分析的主要贡献源为燃煤源、工业源、机动车尾气排放以及扬尘源。
The PM_(2.5) samples were collected in Shenyang during heating period(December 2020)and non-heating period(April 2021)to analyze the concentration characteristics,spatial distribution and sources of heavy metals.The results showed that the concentration of heavy metals in heating period is in the order of Zn>Pb>As>Cu>Cr>Cd>Hg.The order of non-heating period is Zn>Pb>Cr>Cu>As>Cd>Hg.In heating period,the contents of heavy metals in U^(#),S^(#) and N^(#) sampling points are generally higher;while in non-heating period,the contents in T^(#),U^(#) and N^(#) are higher.The main contribution sources of PMF analysis are coal burning sources,industrial sources,vehicle exhaust and dust sources.
出处
《环境保护与循环经济》
2022年第2期70-75,共6页
environmental protection and circular economy
基金
国家自然科学基金面上项目(410713040)。
