摘要
2019年5月在安庆地区对PM2.5进行连续膜样品采集,并在实验室测定了其主要化学成分(水溶性离子和无机元素)的质量浓度。观测期间,PM2.5的平均质量浓度为33.22μg/m^3,总水溶性离子浓度均值为18.71μg/m^3,其中二次离子SO42-、NO3-、NH4+是最主要的水溶性离子,浓度均值分别为5.10、5..43、4.33μg/m^3。10种无机金属元素浓度之和为7.24μg/m^3,其中Fe、Ca、K、Al、Na、Mg等六种元素浓度含量较高。富集因子分析显示,Zn、Cr、Ca、Pb、Fe和Cu等6种元素呈显著富集,可能受人为污染因素影响较大;K和Na呈中度富集,主要来源于自然源,受轻度人为干扰;Mg呈轻度富集,主要来源于地壳元素。PMF模型解析出5种污染源,分别是燃煤源、扬尘源、机动车尾气源、工业工艺源和其他源,占比分别为32.97%、31.07%、24.68%、8.69%和2.60%。
In May 2019,PM2.5 was collected in Anqing area,and its main chemical components(water soluble ions and inorganic elements)were measured in the laboratory.During the observation period,the average mass concentration of PM2.5 is 33.22μg/m3,and the average concentration of total water-soluble ions is 18.71μg/m^3.The secondary ions SO4^2-、NO3^-、NH4^+ are the most important water-soluble ions,and the average concentrations are 5.10,5.43,and 4.33μg/m3,respectively.The total concentration of 10 inorganic metal elements is 7.24μg/m3,among which the concentration of Fe,Ca,K,Al,Na,Mg is higher.Enrichment factor analysis shows that six elements,such as Zn,Cr,Ca,Pb,Fe and Cu,are significantly enriched,which may be greatly influenced by human pollution factors;K and Na are moderately enriched,which are mainly from natural sources and slightly disturbed by human;Mg is slightly enriched,which is mainly from crustal elements.The PMF model analyzed five pollution sources,namely,coal-fired source,dust source,vehicle tail gas source,industrial process source and other sources,accounting for 32.97%,31.07%,24.68%,8.69%and 2.60%respectively.
作者
谷宇
叶雨凝
叶伟
Gu Yu;Ye Yuning;Ye Wei(Air pollution Control Department,Anqing Ecological Environment Bureau,Anqing 246002;College of Chemistry and Chemical Engineering,Shanghai University Of Engineering Science,Shanghai 201620;Anqing environmental monitoring center station,Anqing 246002,China)
出处
《广东化工》
CAS
2020年第8期133-135,共3页
Guangdong Chemical Industry
关键词
PM2.5
来源解析
污染特征
安庆
PM2.5
source analysis
pollution characteristics
Anqing
