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VOCs1,2,1*,1(1., 100871;2., 510030,E-mail:wangboguang@mail.gz.gov.cn;):8、531,TO1555(NMHCs)62(ToxicVOCs),VOC.,VOC,VOCs;VOC,、VOC;NMHC,VOC;VOC,,.:;;;:X831 :A :0250-3301(2004)-0007-09:(40275037);(973)(2002CB410801):(1970~),,,;.*SpecialandTemporalDistributionCharacterofVOCsintheAmbientAirofPealRiverDeltaRegionWANGBo-guang1,2,ZHANGYuan-hang1*,SHAOMin1(1.StateJointKeyLabofEnvironmentalSimulationandPollutionControl,DepartmentofEnvironmentalSciences,PekingUniversi-ty,Beijing100871,China;2.GuangzhouEnvironmentalMonitoringCenter,Guangzhou510030,ChinaE-mail:wangboguang@mail.gz.gov.cn)Abstract:Inthispaper,eightregionalVOCsitesandfiveenhancedVOCsiteandthreedifferentheightsitesforoneyearobserveweredeveloped.ApplyingTO-15measurementmethodprovidedbyUSEPA,thephotochemicalsmogprecursornon-methanehydrocar-bons(NMHC)andToxicVOCs(T-VOC)weremeasuredsimultaneouslyunderroutinequalityassuranceandqualitycontrol(QA/QC)procedures.Basedontheanalyzedresult,thespecialandtemporaldistributionoftheVOCs'concentrationswasresearched.TheresearchfoundtheVOCstookonregionalpollutioninPearlRiverDelta,andtherewerebigdifferencesamongtheVOClevelsateveryfunctionarea.VOCsconcentrationlevelswerehighinurbanarea,anddroppeddownfromurbantodownwindareainsummertime,butfirstdecreasedthenwentupfromurbantodownwindareainwinter.Meanwhile,NMHCandMAHhadthehighestcon-centrationsinsummer,whichismuchdifferentfromcurrentdomesticandinternationalfindings.VOCsspecieshaddifferentdiurnalandseasonalvariations.VOCconcentrationsattheground-levelinurbanareaweredominatedbymotorvehiclesemissions.Concen-trationofprimaryVOCsdecreasedverticallywithheight,whilesecondaryVOCsshoweddifferentbehavior.Keywords:PearlRiverDelta;atmosphere;VOCs;specialandtemporaldistribution ,,(VOCs),[1],.166,(USNAPAP)VOC600(Placetetal.,1990).,.VOCs(、),[3].,VOCs、.VOC,VOC,(、).,,,,,,、、,.2520046 ENVIRONMENTALSCIENCEVol.25,Sup.June,2004DOI:10.13227/j.hjkx.2004.s1.002.,VOCs.,VOCs.1 1.1 6L.Entech,.“SUMMA®”,,.,(30mL/min),.,,.1.5m×50mm、.VOCs,1998920014VOCs,、、、、.1,、.;◆;△1 VOCsFig.1 SamplingsitesforVOCsintheambientairofPRD ()、、、.20005,20009..1、2、3、4、5、6、7、8()8,3/d,6:00~9:00、11:00~14:00、15:00~18:00.11,240(),NMHCVOC.,.2.2000715,2000113~10.,8 25,1、2、3、4、56,3.4/d,6:00~9:00、9:00~12:00、12:00~15:0015:00~18:00.48(),NMHCVOC.,,200143.,,83.,7、2747.,7:30~10:00,11:00~14:0015:00~18:003,3..,24h,.2000724、27,2000116、10.,:31;35.12/d,6:00~8:00、8:00~10:00、10:00~12:00、12:00~14:00、14:00~16:00、16:00~18:00、18:00~20:00、20:00~22:00、22:00~0:00、0:00~2:002:00~4:00.96(),NMHCVOC.,,,,.1.2 USEPATO-15,、、、.VOCs、3.(NMHC)、.2 2.1 VOCVOCs,NMHC(C)0.02~0.91mL/m3.NMHC50.11mL/m3,70.67mL/m3,7.0.36mL/m3.NMHC,0.51mL/m3,,0.15mL/m3,NMHC34.NMHC,0.40mL/m3,0.46mL/m3,0.35mL/m3,,0.27mL/m3.,--NMHC,0.40mL/m3,,.,NMHC.5562,、、、、、、8,25.2×10-9,78.3×10-9,()4.1×10-9,17.5×10-9,4.7×10-9,5.7×10-9,3.7×10-925.7×10-9,:15.6%、48.7%、10.9%、2.9%、3.6%、2.3%16.0%.VOC.,、、()、、、、26.5、197.5、10.5、27.4、1.5、2.6、0.611.1×10-9;17.7、145.0、6.5、8.2、0.5、2.0、0.310.2×10-9.,、()、、、、9 22.3%、31.7%、29.9%、1.8%、3.3%、1.5%9.6%;28.4%、37.0%、15.7%、1.4%、3.9%、0.5%13.2%.:①、VOCs,80%;②VOC,、、,、.2.2 2.2.1 2000NMHCNMHC710,96.,,NMHC.22000(MAHs) 2 Fig.2 Monthlyvariationcurvesformono-aromatics.MAHsNMHC,78MAHs,19~10.,,,2~4,5~7,8~10,11~1.,,MAHs,.32000.711.,18.9.,9~11,16.,,.,3.3,.,,,9~11.3 Fig.3 Monthlyvariationcurvesforalkanes4., 、().2000210,,18.,,.,:-12-11-113;,-11..78,10 257~81~12,,9~ 4 Fig.4 Monthlyvariationcurvesforfreons10.2.2.2 VOC,,,TVOC(56).,,TVOC10:0016:00,8:0022:00;,TVOC10:0020:00,,,.TVOC,,TVOC.5 ()NMHCVOCFig.5 DiurnalvariationcurvesforNMHCandVOCsinHBsiteofurbaninsummer6 ()NMHCVOCFig.6 DiurnalvariationcurvesforNMHCandVOCsinHBsiteofurbaninwinter 7MAHs、.,MAHs.,,.,08:00~10:00111 ,16:00~18:002,,.,.,,,,,,MAHs,,8:00,12:0017:003MAHs.,,,,,,2.,,,,,,MAHS,,MAHs,,.2.3 8.,,NMHCTVOC,NMHCTVOC,3:①※※※,;②※,;③※※,NMHCTVOC.7 、Fig.7 Diurnalvariationcurvesformono-aromaticsinHBsiteinspring,summerandwinter8 2000VOCFig.8 AverageconcentrationdistributionforVOCsalongmainwinddirectionin2000 1,,,12 25.,,,,.,,,,,,.2,,,,,.3,,,,,.,.,TVOC,3:①※※※,;②※,;③※※,.+.1,,、TVOC.,,,,※※.,,,.2,.,,,.,,.3,.,,.,,.,,,NO2,,,.,,.、,TVOC.,.,.7、27473,、、9.725m,,.:①,,:、.②,.,、(07:00~10:00)、(11:00~14:00)(15:00~18:00),,,,,,.,、,,,,.2790m,.:①、、、7,.②,,7.13 9 VOCFig.9 ThetemporalvariationofVOCsconcentrationindifferentheightofQiaoxinsite,,,.③277.,;,;、,,、,.47150m,.,,,,,.,,,,,.3 ,①NMHC,7、8,、、、,,.②VOC,,TVOC2,.,①3:※※※,;※,;※※,..②3:※※※,;※,;※※.VOC.,③VOC.,VOC.,,,;,,.:[1] AtkinsonR.AtmosphericchemistryofVOCsandNOx[J].At-mos.Environ.,2000,34:2063~2101.[2] BroccoD,FratarcangeliR,LeporeL,PetriccaL,VentroneI.14 25DeterminationofaromatichydrocarbonsinurbanairofRome[J].AtmosphericEnvironment,1997,31:557~566.[3] ChunmingLiu,ZiliXu,YaoguoDu,HaichenGuo.AnalysesofvolatileorganiccompoundsconcentrationsandvariationtrendsintheairofChangchun,thenortheastofChina[J].AtmosphericEnvironment,2000,34:4459~4466.[4] DerwentRG,DavisTJ,DelaneyM,DollardGJ,FieldRA,DumitreanP,NasonD,JonesBMR,PeplerSA.Analysisandinterpretationofthecontinuoushourlymonitoringdata
本文标题:珠江三角洲大气环境VOCs的时空分布特征-王伯光
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