生态环境学报2017，Vol.26Issue(3)：437-444,8.DOI:10.16258/j.cnki.1674-5906.2017.03.011
张家口市一次沙尘天气气溶胶单颗粒理化特征和来源研究
Chemical and Physical Characteristics and Sources of Single Particle Aerosols during A Dust Event in Zhangjiakou
摘要
Abstract
In order to understand the origin and characteristics of particles during dust days from the aspect of single particles,a single particle aerosol mass spectrometer (SPAMS) was employed to analyze the chemical composition,size distributions,and sources of aerosol particles during a dust event in the spring of 2016 in Zhangjiakou.According to particle mass spectra,the particles were classified as two main categories:dust particles and non-dust particles,which accounted for 12.9％ and 87.1％ of total particle number.Dust particles were mainly in the size of 0.5～1.1 μm,which included four major subtypes:dust-Al,dust-Si,dust-metal,and dust-Ca particles.Each subtype of particles accounted for more than 20％ of total number of dust-containing particles,with the significant characteristics of mineral particles.Non-dust particles were mainly in the size of 0.4～0).8 μm,which included four subtypes:carbonaceous,K-tich,industrial metal,and other particles.In combination with backward trajectory analysis,dust particles could mainly originate from the dust sources of Xinjiang,Mongolia,and Inner Mongolia,and a small part from the mineral and industrial sources of Zhangjiakou and Shanxi.No-dust particles are possible to be mainly contributed by the industrial emissions and coal burning of local and surrounding areas of Zhangjiakou.The ratio of NO3-/HSO4-(number concentration) is 1.31 in dust particles,indicating a high degree of particle aging.Cl-containing particles accounted for 32％ of the total number of dust particles,indicating mixed artificial components.Our results showed that the SPAMS can be used to analyze the physical and chemical characteristics and sources of single particles on line during the dust event,and can provide referable information for taking effective measures to prevent and reduce dust events.关键词
单颗粒气溶胶飞行时间质谱仪/沙尘/单颗粒/源解析Key words
single particle aerosol mass spectrometer/dust/single particle/source apportionment分类
资源环境引用本文复制引用
李思思,黄正旭,王存美,李惠玲,李梅,周振..张家口市一次沙尘天气气溶胶单颗粒理化特征和来源研究[J].生态环境学报,2017,26(3):437-444,8.基金项目
科技部科技支撑项目(2014BAC21B01) （2014BAC21B01）
2014年广东省公益研究与能力建设专项资金重点项目(2014B020216005) （2014B020216005）
广东省自然基金项目(2015A030313339) （2015A030313339）
珠江科技新星专项(201506010013) （201506010013）
