大气细颗粒物扬尘源单颗粒质谱特征  

Single particle characteristics of fine particulate matter in dust

作　　者：余南娇 黄渤 李梅[1,2] 程鹏[1,2] 李磊[1,2] 黄正旭[1,2] 高伟[1,2] 周振[1,2] YU Nan-jiao;HUANG Bo;LI Mei;CHENG Peng;LI Lei;HUANG Zheng-xu;GAO Wei;ZHOU Zhen(Institute of Mass Spectrometer and Atmospheric Environmental, Jinan University, Guangzhou 510632,China;Guangdong Engineering Research Center for atmospheric pollution online source apportionment system, Jinan University, Guangzhou 510632, China;Guangzhou Hexin Instrument Company Limited, Guangzhou 510530, China)

机构地区：[1]暨南大学质谱仪器与大气环境研究所,广东广州510632 [2]广东省大气污染在线源解析系统工程技术研究中心,广东广州510632 [3]广州禾信仪器股份有限公司,广东广州510530

出　　处：《中国环境科学》2017年第4期1262-1268,共7页China Environmental Science

基　　金：科技部科技支撑项目(2014BAC21B01);2014年广东省公益研究与能力建设专项资金重点项目(2014B020216005);广东省自然科学基金资助项目(2015A030313339);珠江科技新星专项(201506010013)

摘　　要：对广州市土壤尘、道路扬尘、施工扬尘、堆煤扬尘等开放源颗粒物样品进行采集,并利用单颗粒气溶胶飞行时间质谱仪(SPAMS)对颗粒物的粒径和化学成分进行分析.施工尘和其他几类尘分别呈双峰分布和单峰分布,各类尘样的化学组成差异较为明显,其中土壤扬尘以富铝颗粒为主,占总电离颗粒的37.97%,道路扬尘以富钙颗粒为主,占总电离颗粒的24.92%,施工扬尘以富硅颗粒为主,占总电离颗粒的33.33%,堆煤扬尘以富钙颗粒物为主,占总电离颗粒的64.92%.在道路扬尘中土壤扬尘与机动车污染的特征显著,这些特征为扬尘颗粒物源解析提供了可能.此外,道路扬尘的二次组分所占比例最高.Soil dust,road dust,construction dust and coal stock dust in Guangzhou were sampled,The size distributions and chemical composition of fine particles from sampled fugitive dusts were analyzed using a single particle aerosol mass spectrometer(SPAMS).Construction dust and other three types of fugitive dust showed bimodal and unimodal size distribution,respectively.The chemical composition of different dusts had a great diversity.The particles from soil dust were dominated by AlRich particles,accounting for37.97%of the total number of ionized particles;The particles from road dust were dominated by CaRich particles which accounted for24.92%of the total number of ionized particles;particles from construction dust were dominated by SiRich particles,accounting for33.33%of the total number of ionized particles;particles from coal stock dust were dominated by CaRich particles,accounting for64.92%of the total number of ionized particles.It is noted that road dust showed distinct characteristics of soil dust and motor vehicle exhaust.These unique characteristics of fugitive dust enable further source apportionment of dust particles.In addition,the percentage of secondary components was highest in road dust.

关 键 词：扬尘 单颗粒气溶胶质谱 源解析 

分 类 号：X513[环境科学与工程—环境工程]