无锡市一次霾形成过程大气污染物特征分析

大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (1): 22-30.

无锡市一次霾形成过程大气污染物特征分析

云龙龙1, 张天舒1, 陆钒1*, 伍德侠1,2, 盛世杰3, 陆亦怀1, 刘建国1

（1.中国科学院安徽光学精密机械研究所国家环境保护环境光学监测技术重点实验室，安徽合肥 230000；
2.江苏物联网研究发展中心，江苏无锡 214135；
3.无锡中科光电技术有限公司，江苏无锡 214135）

收稿日期:2014-04-03 修回日期:2014-04-25 出版日期:2015-01-28 发布日期:2015-01-09
通讯作者: 云龙龙（1988-），男，山东聊城人，硕士生，主要从事环境监测技术方面的研究。 E-mail:llyu@aiofm.ac.cn
作者简介:云龙龙（1988-），男，山东聊城人，研究生，主要从事环境监测技术方面的研究。
基金资助:
中国科学院战略性先导科技专项（B类）（XDB05040300）、国家重大科学仪器设备开发专项（2011YQ120024）资助

Analysis of Air Pollutants During Process of a Haze in Wuxi City

YUN Long-long1, ZHANG Tian-shu1, LU Fan1*, WU De-xia1,2, SHENG Shi-jie3, LU Yi-huai1, LIU Jian-guo1

(1. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, State Environmental Protection Key Lab of Optical Monitoring Technology, Hefei 230000, China;
2.Jiangsu Research and Development Center of Internet of Things, Wuxi 214135, China;
3. Wuxi CAS Photonics Co., Ltd, Wuxi 214135, China)

Received:2014-04-03 Revised:2014-04-25 Published:2015-01-28 Online:2015-01-09

摘要/Abstract

摘要：

于2013年12月21~26日期间对一次霾污染过程中PM2.5、含碳气溶胶、气态污染物（O3，NOx SO2）进行测量，利用微脉冲偏振激光雷达获得气溶胶消光和退偏振度参数，分析了霾过程大气污染物的特征。结果显示：本次霾污染过程持续3.4天，以细粒子污染为主。采样期间，PM2.5的质量浓度小时平均值为131.04µg•m-3，霾天气下为183.75µg•m-3，是非霾天气的2.98倍。碳质气溶胶（TC）占PM2.5的24.18%，并且与PM2.5之间存在较好的相关性（R2=0.790）。在霾天气下TC在PM2.5中所占的比例（TC%，16.65）要比非霾天气（TC%，34.38）小，二次水溶性无机盐粒子的快速增长可能是造成霾天气PM2.5质量浓度较高的重要原因之一。霾天气和非霾天气对比：O3浓度无明显变化，受太阳辐射影响较大；NOx和SO2的体积分数在霾天气下分别是非霾天气下的1.66和1.68倍；SO2浓度的增加不仅与本地SO2的累积有关，还有可能是受外来输入的粒子中存在含硫化合物、抑制了SO2的非均相反应造成的。

关键词: 偏振激光雷达, PM2.5, 霾, 碳质气溶胶, 二次无机盐

Abstract:

The concentrations of PM2.5, carbonaceous aerosols, O3, NOx, SO2 were measured from a haze event in Wuxi City, Jiangsu, China from Dec.21th to Dec.26th, 2013. Aerosol extinction coefficient and depolarization ratio were measured by micro-pulse polarization lidar. Characteristics of air pollutants in haze days were analysed. The haze event last for 3.4 days and fine particles were the main pollutants. Hourly average mass concentration of PM2.5 was 131.04µg•m-3, and 183.75 µg•m-3 in haze days which was 2.98 times higher than in normal days. Total carbon (TC), which was strongly correlated (correlation coefficients=0.790) with PM2.5, accounted for 24.18% of the mass concentration of PM2.5. In haze days, the ratio of TC to PM2.5 was 16.65%, lower than that in normal days (34.38%). This suggested that secondary inorganic particles might have a fast increase in haze days, which led to a high concentration of PM2.5. The concentration of O3, affected greatly by solar radiation, showed less variation both in haze days and normal days. The volume fraction of NOx and SO2 in haze days was 1.66 which was 1.68 times higher than in normal days, respectively. The increase concentration of SO2 was not only related to local accumulation but also can be affected by sulfur-rich particles from external transmission; the sulfur-rich particles might inhibit the heterogeneous reaction of SO2.

Key words: polarization lidar, PM2.5, haze, carbonaceous aerosol, secondary inorganic particles

中图分类号:

TN958
X513

云龙龙张天舒陆钒伍德侠盛世杰陆亦怀刘建国. 无锡市一次霾形成过程大气污染物特征分析[J]. 大气与环境光学学报, 2015, 10(1): 22-30.

YUN Long-Long, ZHANG Tian-Shu, LU Fan, WU De-Xia, SHENG Shi-Jie, Lu-Yi-Fu, LIU Jian-Guo. Analysis of Air Pollutants During Process of a Haze in Wuxi City[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(1): 22-30.

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