摘要
利用单颗粒气溶胶飞行时间质谱(SPAMS)于2015年12月1～31日对南京江北新区大气单颗粒进行了测量,共采集到同时含有正负离子谱图的颗粒747. 8万个.结果表明,监测期间南京江北新区总体空气质量较差,污染天气占比为49. 2%,SPAMS所捕获的颗粒数与PM_(2.5)质量浓度的相关性达到0. 83,因此颗粒物数浓度在一定程度上能够用来反映大气污染状况,监测点主要污染源包括燃煤源以及机动车尾气源,工业工艺源污染占比居第3位,3种源的总贡献率达到63. 5%.从整体上看,PM_(2.5)质量浓度的升高大多伴随着燃煤及机动车尾气占比的升高,EC、混合碳(ECOC)与OC在生物质燃烧、扬尘、汽车尾气排放、燃煤燃烧以及工业源中均与NO_2^-、NO_3^-以及SO_4^-有较高的混合程度.
To characterize the ambient particles in the Nanjing Jiangbei New Area, a single particle aerosol mass spectrometer ( SPAMS) was deployed from December 1 to 31 , 2015. A total of 7. 478 million particles were analyzed with both positive and negative ion spectra. The air quality of Nanjing during the measurement period was poor, and the percentage of pollution days was 49. 2%. The correlation (R) between the SPAMS particle number and PM2.5 concentration was 0. 83, showing that the particle number could reflect the trend in the variation of atmospheric pollution. The dominant pollutant source at the monitoring site was coal combustion, followed by vehicle emissions and industrial emissions, with a contribution ratio of 63. 5%. The increase in the PM2.5 mass concentration was accompanied by a High proportion of coal combustion or vehicle emissions. A high mixing state between EC, ECOC, and OC and NO2^-, NO3^-, and SO4^- was observed for the sources of biomass burning, dust, vehicle emissions, coal combustion, and industrial emissions.
作者
于兴娜
时政
马佳
李梅
龚克坚
YU Xing-na;SHI Zheng;MA Jia;LI Mei;GONG Ke-jian(Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology,Nanjing 210044,China;Guangzhou Hexin Instrument Co.,Ltd.,Guangzhou 510530,China;Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632,China;Guangdong Provinc-ial Engineering Research Center for On-line Source Apportionment System of Air Pollution,Guangzhou 510632,China;Meteorological Observatory of Ningxia Branch Northwest Air Traffic Management Bureau Civil Aviation Administration of China, Yinchuan 750009,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2019年第4期1521-1528,共8页
Environmental Science
基金
国家重点研发计划项目(2016YFC0203501)
国家自然科学基金项目(91544229
41475142
41775154)
江苏省"六大人才高峰"项目(JNHB-057)
江苏省高校"青蓝工程"项目
关键词
在线源解析
单颗粒气溶胶质谱仪(SPAMS)
机动车尾气
燃煤
混合状态
on-line source apportionment
single particle aerosol mass spectrometer (SPAMS)
vehicle emission
coal combustion
mixing state
