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时间:2020-04-25
《南宁市郊空气和大气干湿沉降物中多环芳烃的污染特征-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、环境污染与防治第36卷第8期2014年8月南宁市郊空气和大气干湿沉降物中多环芳烃的污染特征*孔祥胜苗迎(中国地质科学院岩溶地质研究所,中国地质科学院岩溶生态系统与石漠化治理重点开放实验室,广西桂林5410O4)摘要采用空气被动采样器和大气千湿采样器分夏、冬季采集大气及其干湿沉降物样品,利用气相色谱一质谱联用仪测定16种多环芳烃(PAHs)优先控制污染物。结果表明:冬、夏季大气干湿沉降物中PAHs的平均值分别为581.06、174.59ng/(m·d),冬季PAHs的组成以2~3环PAHs为主,夏季以4~6环PAHs为主;冬、夏季空气中PAHs的平均值
2、分别为149.16、168.70ng/d,均以2~3环PAHs为主。大气干湿沉降物PAHs的沉降通量时空变化为:冬季,商住文教混合区>农业区>工业区;夏季,工业区>农业区>商住文教混合区;冬季大于夏季3.3倍。空气PAHs沉降通量的时空变化为:冬季,工业区>商住文教混合区>农业区;夏季,农业区>工业区>商住文教混合区;冬季略低于夏季。关键词多环芳烃环境空气大气干湿沉降空气被动采样器南宁市PollutioncharacteristicofPAHsintheatmosphericdepositionandairofNanningsuburbKONGXia
3、ngsheng,MIAOYing.(InstituteofKarstGeology,ChineseAcademyofGeologicalScience,KeyOpenLaboratoryofKarstEcosys—ternandRockyDesertificationControl,ChineseAcademyofGeologicalScience,GuilinGuangxi541004)Abstract:Thesamplesofambientairandatmosphericdryandwetdepositioninsummerandwintero
4、fNanningwerecollectedbypolyurethanefoampassivesamplers(PUF-PAS)andatmosphericdryandwetdepositionscollector.16prioritycontrolpollutantsofpolycyclicaromatichydrocarbons(PAHs)inthesesampleswerequantitativeanalyzedusinggaschromatography-massspectrometryinstrument(GC-MS).Theresultss
5、howedthatPAHsdepositionalflu—xesinwinterandsummerhasanaveragevalueof581.06,174.59ng/(m·d)respectively.DominantPAHscom—poundswere2-3ringsPAHsinwinter,butdominantPAHscompoundswere4-6ringsPAHsinsummer.Theaver—agePAHsconcentrationinairofwinterandsummerwere149.16and168.70ng/drespect
6、ively.DominantPAHscompoundsinairwere2-3ringsPAHs.TemporalandspatialdistributionofPAHsinatmosphericdepositionofwin—terwerecommercialandlivingarea>theagriculturearea>theindustrialdistrict,theatmosphericPAHsdepositioninsummerfollowedtheorderofindustrialdistrict>theagriculturearea>
7、thecommercialandlivingarea,andthePAHsconcentrationsinwinterwas3.3timesofthatinsummer.TemporalandspatialdistributionofPAHSinairofwinterwere:theindustrialdistrict>theagriculturearea>thecommercialandlivingarea,inairofsummerweretheagricul—turearea>theindustrialdistrict>thecommercia
8、landlivingarea,andthePAHsconcentrationsinwinterwasslig
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