【作者】 洪也； 马雁军； 李潮流； 刘宁微； 高少鹏； 张云海；

【Author】 HONG Ye1,MA Yan-jun1,LI Chao-Liu2,LIU Ning-wei1,GAo Shao-Peng2,ZHANG Yun-hai1 1.Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110016,China 2.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China

【机构】 中国气象局沈阳大气环境研究所； 中国科学院青藏高原研究所；

【摘要】 为分析沈阳市冬季灰霾日大气颗粒物元素粒径分布特征,2009年1月14日─2月2日,用安德森分级撞击式采样器进行大气颗粒物分级采样,并用电感耦合等离子体质谱仪(ICP-MS)对各级样品中Na,K等30余种元素进行分析,讨论了灰霾日、非霾日及除夕日大气颗粒物元素质量浓度和富集因子的粒径分布特征及来源.结果表明:灰霾日大气颗粒物及其元素的质量浓度均高于非霾日,粒径越细,浓度越高,越容易富集污染元素.Fe类元素以地壳元素为主,浓度粒径分布在非霾日呈双峰型,最高峰值出现在9-10μm粗粒级段,在灰霾日和除夕日呈三峰型,最高峰值也在9-10μm粗粒级段;Mn类元素在非霾日与Fe类元素相似,呈双峰型,最高峰值在9-10μm粗粒级段,在灰霾日和除夕日呈双峰型,但最高峰值在<1.1μm细粒级段;K类和Zn类元素浓度和富集因子的粒径分布均呈单峰型,峰值出现在<1.1μm细粒级段;K类元素主要来源于烟花爆竹释放;Zn类元素主要源于人为污染,Pb和As等污染元素因其来源不同,在灰霾日和非霾日的表现也不相同.更多还原

【Abstract】 Based on element analysis(Na-Bi) of different diameter atmospheric particles collected from 14,January to 2,February in 2009 with Anderson sampler,we discussed the Element concentrations and particle size distribution of enrichment factors in haze days and New Year’s Eve days of Shenyang.The results showed that the mass concentrations of atmospheric particles and elements in haze days was higher than that in normal days,The smaller the particles are the larger difference between haze days and normal days.The concentration of "Fe" class element in nomal days showed bimodal type of coarse particle(9-10μm),and triple-peak in haze days and New Year’s Eve days,Which belonged to crustal elements mainly with coarse particle(9-10μm);The concentration of "Mn" class element showed bimodal type with coarse particle(9-10μm),and bimodal type with fine particle(< 1.1 μm) in haze days and New Year’s Eve days,size distribution of mass concentrations and enrichment factors of K and Zn class elements were mainly in fine fraction(< 1.1 μm).The maximum contents of K and Zn class elements were reached in New Year’s Eve days.K,Sr and Ba mainly originate from the release of fireworks,Pb class element is mainly from road dust,,coal,industrial process and vehicle emission.Pollution of heavy metals Zn and As reach their maximum in haze days,which mainly originate from human being activities of coal combustion and industrial process.In haze days,the top pollution is the fine particle(<1.1 μm),which enriched other metals(Zn,Pb,As and Tl).更多还原