Chemical characterization and sources of PM2.5 at 12-h resolution in Guiyang, China

查看全文 作　　者：Longchao [1,2,3]Liang;Na [2]Liu;Matthew S. [4]Landis;Xiaohang [2]Xu;Xinbin [2]Feng;Zhuo [3]Chen;Lihai [2]Shang;Guangle [2]Qiu

机构地区：[1]Guizhou University, Guiyang 550025, China;[2]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;[3]Guizhou Normal University, Guiyang 550001, China;[4]U.S. EPA, Office of Research and Development, Research Triangle Park, Durham, NC 27709, USA

出　　处：《Acta Geochimica》索引2018年第37卷第2期,共12页

基　　金：The U.S. Environmental Protection Agency (EPA), through its Office of Research and Development, partially funded and participated in the research described here through cooperative agreement CR-833232-01 through the U.S. National Science Foundation-National Research Council Research Associateship Award;funded by the National Key Basic Research Program of China (2013CB430004);the National Natural Science Foundation of China (No. 40773067) 摘　　要：The increasing emission of primary and gaseous precursors of secondarily formed atmospheric particulate matter due to continuing industrial development and urbanization are leading to an increased public awareness of environmental issues and human health risks in China.As part of a pilot study, 12-h integrated fine fraction particulate matter(PM_(2.5) filter samples were collected to chemically characterize and investigate the sources of ambient particulate matter in Guiyang City, Guizhou Province, southwestern China. Results showed that the 12-h integrated PM_(2.5) concentrations exhibited a daytime average of 51 ± 22 lg m^(-3)(mean ± standard deviation) with a range of 17–128 lg m^(-3) and a nighttime average of55 ± 32 lg m~(^(-3)) with a range of 4–186 lg m^(-3). The 24-h integrated PM_(2.5) concentrations varied from 15 to157 lg m~(^(-3)), with a mean value of 53 ± 25 lg m^(-3), which exceeded the 24-h PM_(2.5) standard of 35 lg m^(-3) set by USEPA, but was below the standard of 75 lg m^(-3), set by China Ministry of Environmental Protection. Energy-dispersive X-ray fluorescence spectrometry(XRF) was applied to determine PM_(2.5) chemical element concentrations. The order of concentrations of heavy metals in PM_(2.5) were iron(Fe) [ zinc(Zn) [ manganese(Mn) [ lead(Pb) [ arsenic(As) [ chromium(Cr). The total concentration of 18 chemical elements was 13 ± 2 lg m^(-3),accounting for 25% in PM_(2.5), which is comparable to other major cities in China, but much higher than cities outside of China. 关键词：PM2.5 化学元素中国分辨率微粒物质标准差健康风险环境问题

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Chemical characterization and sources of PM2.5 at 12-h resolution in Guiyang, China

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