中文摘要：

利用电称低压冲击仪（ELPI）在线监测上海市嘉定区2009年春节前后不同粒径（50%切割粒径分别为：0.03、0.06、0.11、0.17、0.26、0.40、0.65、1.00、1.60、2.50、4.40、6.80μm）大气颗粒物的粒子数浓度变化.对比春节与非节日期间该地区大气颗粒物（〈0.49、0.49—0.95、0.95—1.50、1.50—3.00、3.00—7.20、〉7.20μm）中Na、Mg、Al、K、Ca、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Pb 17种元素,F-、Cl-、NO 2-、SO24-、NO 3-、Na＋、NH 4＋、K＋、Mg2＋、Ca2＋10种离子与有机碳（OC）、元素碳（EC）质量浓度的粒径分布.结果表明,春节对于大气颗粒物粒子数浓度的影响主要集中在0.11—1.60μm.如果以3.00μm为界将大气颗粒物划分成细（≤3.00μm）和粗（〉3.00μm）颗粒物时,春节影响体现在细颗粒的元素为：Na、As、Pb,且主要集中于〈0.49μm颗粒中;春节影响集中于大颗粒（〉7.20μm）的元素为：Ni、Co;没有受到显著影响的为：Ca、V、Mn、Fe、Zn、Se;春节期间细颗粒与粗颗粒中的浓度同时受到影响的离子为：F-、SO24-、NH 4＋、K＋、Mg2＋,其中Mg2＋、K＋在细颗粒中的浓度远高于平时;春节的影响限于细颗粒中的离子为：Cl-、NO 3-、Na＋、NO 2-、Ca2＋,影响最为严重的是NO2-.总悬浮颗粒中,OC与EC的质量浓度远高于平时,主要集中于细颗粒中,粗颗粒中无明显变化.

英文摘要：

Number concentrations of particulate matters with different diameters（mass medium diameter： 0.03,0.06,0.11,0.17,0.26,0.40,0.65,1.00,1.60,2.50,4.40,6.80 μm） were on-line monitored using an ELPI（electrical low pressure impactor） during 2009 Spring Festival in Jiading District,a suburb area in Shanghai.Several chemical components including 17 elements,10 ions,organic and elemental carbon in particulate matters with different diameters（0.49,0.49—0.95,0.95—1.50,1.50—3.00,3.00—7.20,7.20 μm） were further determined.These particulate matters were collected on both the Spring Festival and ordinary days on the same sampling site.Experimental results showed that the influence of Festival Spring on the number concentrations was mainly on the particulate matters with size range of 0.11— 1.60 μm.If the particulate matters are divided into fine（≤3.00 μm） and coarse（〉3.00 μm） ones by the diameter of 3.00 μm,it can be seen that the trace elements of Na,As and Pb in fine particulates were greatly affected by the Spring Festival and such effects appeared mainly in the particulate matter with size of 0.49 μm.The trace elements of Ni,Co in coarse particles with size of 〉7.20 μm were affected by the Spring Festival while Ca,V,Mn,Fe,Zn,Se didn′t show significant effect of the Spring Festival.F-,SO2-4,NH＋4,K＋,Mg2＋ in both fine and coarse particulates were influenced by the Spring Festival.K＋ and Mg2＋ were influenced seriously in fine particles,and Cl-,NO-3,Na＋,NO-2 and Ca2＋ in coarse particles were influenced.The OC and EC were much higher in TSP during the Spring Festival than those on ordinary days,and the increases mainly occurred in the fine particles.