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1、天津市松针中全氟化合物可挥发前体物的分布测定#赵洋洋,姚义鸣,孙红文**51015202530354045(南开大学环境科学与工程学院,教育部环境污染过程与基准教育部重点实验室,天津300071)摘要:全氟化合物(PFCs)广泛分布于环境各个介质中,其作为一类新型持久性环境污染物近年来备受关注。而松针作为一种植物被动采样器曾应用于指示空气中多环芳烃、多氯联苯等憎水性有机污染物的水平。本研究调查了天津市松针中PFCs前体物质的浓度水平,旨在探讨松针作为PFCs前体物天然被动采样装置的可行性。结果表明,松针中PFCs前体物的总浓度
2、范围为0.03-5.94ng/g(干重),平均浓度0.55ng/g(干重),不同采样点前体物的浓度水平存在差异。对于单个前体物,8:2氟调醇的检出率高达85%,浓度在0.03-2.27ng/g(干重)之间,10:2氟调醇全部被检出,浓度范围为0.03-3.67ng/g(干重);N-乙基全氟辛烷磺酰胺和N-乙基全氟辛烷磺酰胺基乙醇的检出率较低;而N-甲基全氟辛烷磺酰胺基乙醇和6:2氟调醇在松针中并未检出。松针中氟调醇的浓度水平随着碳链长度增加而增加。不同松针中前体物的总浓度水平不同,油松中最高,圆柏次之,青海云杉和雪松中的总浓度水平较
3、低,但相差不大。松针可作为被动采样的一种形式,从一定程度上反映大气中PFCs前体物的浓度水平。关键词:PFCs前体;氟调醇;松针;被动采样技术中图分类号:X511TheDistributionofVolatilePrecursorsofPerfluorinatedCompoundsinPineNeedlesofTianjinZhaoYangyang,YaoYiming,SunHongwen(CollegeofEnvironmentalScienceandEngineering,NankaiUniversity,KeyLaborato
4、ryofEnvironmentalPollutionProcessandStandard(NankaiUniversity),MinistryofEducation,Tianjin300071)Abstract:Perfluorinatedcompounds(PFCs)areubiquitousinenvironmentalmedia.Asanewtypeofpersistentorganicpollutants(POPs),theyhavedrawnmuchscientificattentioninrecentyears.Pine
5、needles,acommonlyusedpassiveairsampler,havebeenreportedtobeanindicatorofatmosphericcontaminationlevelsofhydrophobicorganiccompounds,suchaspolycyclicaromatichydrocarbons(PAHs),polychlorinatedbiphenyl(PCBs).Inthepresentstudy,thelevelsofPFCprecursorsweredetectedinpineneed
6、lesofTianjintochecktheirapplicabilityinmonitoringthiskindofnewPOPs.TheresultsshowedthattheconcentrationsofPFCprecursorsrangedfrom0.03to5.94ng/g(dw),withtheaverageconcentrationbeing0.55ng/g(dw).ThePFCsprecursors’levelsvariedamongdifferentsamplingsites.Astosingleprecurso
7、r,N-methylperfluorooctanesulfonamidoethanoland6:2fluorotelomeralcohol(6:2FTOH)werenotdetected,andthedetectionratesofN-ethylperfluorooctanesulfonamidoethanolandN-ethylperfluorooctanesulfonamidewerelow.Ontheotherside,thedetectionrateof8:2FTOHwasashighas85%,withconcentrat
8、ionsof0.03-2.27ng/g(dw),and10:2FTOHweredetectedinallsamples,withtheconcentrationsof0.03-3.67ng/g.Theconcentrationleve