西安市高分辨率PM-2-5-质量浓度变化特征分析

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PM2.5,,,,(,710055):R&P1400a(TEOM)200903~201002PM2.5,。,PM2.5,PM2.5630.4μg/m3,PM2.5。PM2.5,,10:00~11:0021:00~22:00,4:00~5:0017:00~18:00。:PM2.5;;:X8:A:1674-4829(2011)S1-0063-020(PM10)<10μm,。2.5μmPM2.5,,,,[1-4]。,、、[5]。,PM2.5。,,。PM2.5,1,,PM2.5,。11.1(34'15,108'55),,604.2mm,13.3℃,830。,25m,,,,200903~201002。1.2R&P1400aTEOM,PM2.5:2010-12-13:2011-01-23:(2008BAC46B0);(09dz1204402);.:(1986-),,,,.AnalysisofPM2.5MassConcentrationsVariationwithHighResolutioninXi'anCityTAOLi,ZHANGCheng-zhong,ZHOUBian-hong,ZHANGBi-yun,LIULi-zhongAbstract:ThedatesofrealtimehourlyPM2.5massconcentrationswasobtainedandanalyzedduringMar,2009toFeb,2010inXi'anwiththeinstrumentofR&PTEOM?Series1400.TheresultsshowsthatthevariationofhourlyPM2.5massconcentrationsismoreobvious.ThemaximumofPM2.5massconcentrationsis630.4μg/m3intheyear.FireworksinfestivalscancauseseriouspollutionofPM2.5.PronounceddiurnalcycleinPM2.5concentrationsisevidentinfourseasons,anddisplayabi-modalpatternwithsignificanthighpeaksbetween10:00to11:00and21:00to22:00,andwithlowpeaksbetween17:00to18:00.Keywords:PM2.5;TEOM;Diurnalvariation24120116EnvironmentalScienceandTechnologyVol.24Supp.1Jun.2011EnvironmentalScienceandTechnology20116。PM2.5,,26℃,50℃,1L/min。,30%。24hPM2.5。22.1PM2.5200903~201002,PM2.58123,1。PM2.5,3~5,6~8,9~11,12~2。PM2.5,、、2。、2、2,、2PM2.5200μg/m3,100μg/m3。10,PM2.5,1300μg/m32009102921:00(304μg/m3),200911911:00400μg/m3(422.3μg/m3)。2009112313:00,630.4μg/m3。PM2.5。,201011012:00PM2.5606.8μg/m3,11110:00PM2.5604μg/m3,11711:00,12:00PM2.5604μg/m3612.1μg/m3,,PM2.5,PM2.5,。,12010214()0:00ρ(PM2.5)495.2μg/m3,228()22:00389μg/m3,PM2.5。2.2PM2.5PM2.52。2,PM2.5,,10:00~11:0021:00~22:00,4:0018:00。2,11:00,,1d4:00,5:00,218:00。22:00,17:00,15:00~18:00,。3,10:00ρ(PM2.5)(146.2μg/m3),21h,13:00(138.9μg/m3),10:00~13:00。2,。,,PM2.52,,,,PM2.5,11:00,,,PM2.518:00,20:00PM2.5,,PM2.55:00。3,,。,10:00,,,。123456789101112ρ(PM2.5)/(mg·m-3)7006005004003002001000ρ(PM2.5)/(mg·m-3)1501401301201101009080706050400∶001∶002∶003∶004∶005∶006∶007∶008∶009∶0010∶0011∶0012∶0013∶0014∶0015∶0016∶0017∶0018∶0019∶0020∶0020∶0021∶0022∶0023∶001200903~201002PM2.52PM2.5(67)642413(1)PM2.5,。PM2.52009112313:00,606.8μg/m3,600μg/m312:00,PM2.5。(2)PM2.5,。(3)PM2.5,。10:00~11:0021:00~22:00,4:0018:00。[][1]HAAGENSAJ.Chemistryandphysiologyoflosangelessmog[J].IndustEngChem,1952,44:1342-1346.[2]FINLAYSONBJ,PITTSJN.Photochemistryofthepollutedtroposphere[J].Science,1976,192:111-119.[3],,,.PM2.5[J].,2003(6):761-767.[4],,,.PM2.5[J].,2007,18(5):645-653.[5],,,.PM2.5[J].,2007,4(5):641-647.()(64)4(1)。(2),。(3),。(4),。(5),;、、、。10%,;,;VOCSVOC,,。(6),。5(1)。(2)。(3)。(4),。。6、、、、。,。[][1].[M].:,2009.[2].[M].:,2008.[3]《》.[M].4.:,2003.[4],,.“”[J].,2006(5):72-73.()!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!67

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