| 引用本文: | XIAN Yue, WANG Lei-li, SHAN Long, GUO Zhen-dong, JI Zhu-mei，ZHANG Jun，MA Jing-jing.Analysis on Pollution Characteristics and Sources of PM2.5 in Autumn and Winter in Yancheng[J].Environmental Monitoring and Forewarning,2021,13(4):47~53 |
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| 摘要: |
| 于2019年10月—2020年2月在盐城市开展大气PM2.5离线监测，对PM2.5的浓度变化、质量平衡、组分及来源进行了分析。结果表明，监测期间盐城市ρ（PM2.5）月均值为43.32~62.59 μg/m3，其中1月最高；监测期间ρ（PM2.5）平均值为54.25 μg/m3，质量重建后该值为52.38 μg/m3，与实测值的相关性达到0.98；PM2.5占比最多的成分是
硫酸盐、硝酸盐和铵盐（SNA）；m（NO-3）/m（SO2-4）的平均值为2.16，说明监测期间盐城市机动车相比固定源对NO2和SO2有更高的贡献；通过主成分因子分析，可知盐城市秋、冬季节PM2.5主要来源于土壤和扬尘源、燃烧源以及二次无机源。 |
| 关键词: 细颗粒物 质量重建 硫酸盐、硝酸盐和铵盐 主成分因子分析法 盐城市 |
| DOI： |
| 分类号:X823 |
| 基金项目:江苏省PM2.5和臭氧污染协同控制重大专项基金资助项目（2019023） |
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| Analysis on Pollution Characteristics and Sources of PM2.5 in Autumn and Winter in Yancheng |
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XIAN Yue, WANG Lei-li, SHAN Long, GUO Zhen-dong, JI Zhu-mei，ZHANG Jun，MA Jing-jing
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Jiangsu Yancheng Environmental Monitoring Center, Yancheng, Jiangsu 224002, China
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| Abstract: |
| From October 2019 to February 2020, off line sampling was conducted to study the concentration level and mass balance of PM2.5 in Yancheng urban area, component analysis and source analysis were done as well. The results showed that the monthly average concentration of PM2.5 in Yancheng city ranged from 43.32 to 62.59 μg/m3, with the highest concentration in January. The average concentration of PM2.5 was 54.25 μg/m3,the reconstructed value was 52.38 μg/m3, and the correlation with the measured concentration reached 0.98. During the monitoring period, the most important component of PM2.5 in Yancheng is SNA(SO2-4+NO-3+NH+4), in which the average value of m(NO-3)/m(SO2-4) is 2.16, indicating that motor vehicles in Yancheng have a higher contribution to NO2 and SO2 than fixed sources during this period. Principal component analysis showed the PM2.5 of Yancheng city in autumn and winter mainly comes from soil, dust source, combustion source and secondary inorganic source. |
| Key words: PM2.5 Reconstruction SNA(SO2-4+NO-3+NH+4) PCA Yancheng City |
