首页> 中文期刊> 《中国环境监测》 >2014年“国家公祭日”保障期间南京PM2�5中碳组分污染特征

2014年“国家公祭日”保障期间南京PM2�5中碳组分污染特征

         

摘要

利用2014年“国家公祭日”期间南京市草场门测点OC和EC在线监测仪器,分析了PM2�5中碳组分污染特征,结果表明:“国家公祭日”保障期间OC、EC的平均质量浓度为9�6μg/m3和3�9μg/m3,两者占PM2�5质量的19%,是PM2�5的重要组成部分;“国家公祭日”期间OC/EC(质量浓度比)的平均值为2�47,表明大气中存在二次反应生成的SOC,通过分析管控不同阶段EC与OC以及EC与SO2、NO2的相关性,表明两者受本地机动车影响较大;通过气流后向轨迹聚类分析表明,“国家公祭日”管控期间来自周边安徽、江苏、浙江交界处的气流对应的EC浓度最高,为7�14μg/m3,进一步运用浓度权重轨迹( CWT)方法分析EC的潜在贡献源区,表明对南京EC输送强潜在源区主要在安徽省东南部,集中在芜湖、宣城、黄山一线,其贡献可超过8μg/m3。%By using the sunset semi continuous OC and EC aerosol carbon equipment, the article discussed EC and OC concentration characteristics and sources during the National Public Memorial Day of Nanjing Massacre. The results showed:the average concentration of OC and EC was 9�6 μg/m3 and 3�9 μg/m3 , both of them accounted for 19% of PM2�5 , which are an important part of PM2�5;During the control period, the average OC/EC was 2�47, indicating the presence of secondary reactions in the atmosphere generated by the SOC. By calculating the correlation between EC and NO2 , SO2 , and the correlation between EC and OC, the results indicated that they mainly came from the local emission source of motor vehicle exhaust. Cluster analysis of back trajectory and concentration weight trajectory ( CWT) were used to further analyze the transmission sources of EC. The results showed that during the control period gas flow from the neighboring provinces ( Anhui, Jiangsu and Zhejiang province) corresponding to the highest concentration of EC, which was 7�14 μg/m3 . By using CWT method to analyze the potential EC′s contribution source area, it showed that the southeast part of Anhui Province was the major strong potential transmission source region of Nanjing EC, concentrated in Xuancheng⁃Mount Huangshan⁃Wuhu line, which contributed for more than 8 μg/m3 .

著录项

  • 来源
    《中国环境监测》 |2017年第1期|22-28|共7页
  • 作者单位

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    江苏省南京市环境监测中心站;

    江苏省空气预警监测重点实验室;

    江苏 南京 210013;

    河北省邢台市环境监测站;

    河北 邢台 054000;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 大气评价;
  • 关键词

    元素碳; 有机碳; 权重轨迹分析;

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