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1、EnvironmentalPollution180(2013)27e33ContentslistsavailableatSciVerseScienceDirectEnvironmentalPollutionjournalhomepage:www.elsevier.com/locate/envpolSpatialdistributionofpolychlorinatednaphthalenesintheatmosphereacrossNorthChinabasedongriddedfieldobservationsa,1a,1a,*baaaYanLin,YifanZhao,XinghuaQi
2、u,JinMa,QiaoyunYang,MinShao,TongZhuaStateKeyJointLaboratoryforEnvironmentalSimulationandPollutionControl,CollegeofEnvironmentalSciencesandEngineering,CenterforEnvironmentandHealth,PekingUniversity,Beijing100871,PRChinabStateKeyLaboratoryofEnvironmentalCriteriaandRiskAssessment,ChineseResearchAcad
3、emyofEnvironmentalSciences,Beijing100012,ChinaarticleinfoabstractArticlehistory:Polychlorinatednaphthalenes(PCNs)belongtoagroupofdioxin-likepollutants;howeverlittleinfor-Received18March2013mationisavailableonPCNsinNorthChina.Inthisstudy,griddedfieldobservationsbypassiveairReceivedinrevisedformsamp
4、lingat90siteswereundertakentodeterminethelevels,spatialdistributions,andsourcesofPCNs27April201333intheatmosphereofNorthChina.Amedianconcentrationof48pgm(range:10e2460pgm)forAccepted30April2013P29PCNsindicatedheavyPCNpollution.Thecompositionalprofileindicatedthatnearly90%ofPCNsobservedwerefromth
5、ermalprocessesratherthanfromcommercialmixtures.RegardingthesourceKeywords:type,aquantitativeapportionmentsuggestedthatlocalnon-pointemissionscontributedtwo-thirdsofPolychlorinatednaphthalenethetotalPCNsobservedinthestudy,whereasapointsourceofelectronic-wasterecyclingsiteAtmosphereSourcecontribute
6、daquarteroftotalPCNs.Theestimatedtoxicequivalentquantityfordioxin-likePCNsrangedfrom0.97to687fgTEQm3,withtheelectronic-wasterecyclingsitewiththehighestrisk.PassiveairsamplingNorthChinaÓ2013ElsevierLtd.Allrightsreserved.1.IntroductioncontainingPCNs,andtheotheroneisasaby-productofcertainthermalpro
7、cesses.CommercialPCNmixtures,usuallywiththeInrecentdecades,persistentorganicpollutants(POPs)havetradenamesofHalowaxes(KoppersCompany,USA),Nibrenwaxesreceivedsignificantresearchattentionowingtotheirpersistencein(Bayer,Ge
