資源描述:
《大氣干濕沉降:地下河多環(huán)芳烴的重要來源--以廣西清水泉地下河為例-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、2014年3月地球?qū)W報(bào)Mat.20l4第35卷第2期:239.247ActaGeoscienticaSinicaVl01.35No.2:239.247、^nⅣw.cagsbulletin.comWWW.地球?qū)W報(bào).corn大氣干濕沉降:地下河多環(huán)芳烴的重要來源以廣西清水泉地下河為例孔祥勝,苗迎中國地質(zhì)科學(xué)院巖溶地質(zhì)研究所,巖溶生態(tài)系統(tǒng)與石漠化治理重點(diǎn)實(shí)驗(yàn)室,國土資源部/廣西壯族自治區(qū)巖溶動(dòng)力學(xué)重點(diǎn)實(shí)驗(yàn)室,廣西桂林541004摘要:為證實(shí)大氣干濕沉降物是巖溶地下河中多環(huán)芳烴(PAHs)~來源,研究選擇了某城市典型的巖溶地下河水源地作為研究地點(diǎn),采用大氣干濕采樣器、聚氨酯泡沫(PUF
2、)大氣被動(dòng)采樣器分別采集大氣及其干濕沉降物樣品,同時(shí)采集地下河水樣和分層采集流域土壤,利用氣相色譜.質(zhì)譜聯(lián)用儀(GC—Ms)測(cè)定了16種PAHs優(yōu)先控制污染物。結(jié)果表明,地下河流域大氣干濕沉降中PAHs的干濕沉降通量為147.26ng·(m·d)~,流域PAHs沉降量為1943.8g;大氣中的PAHs濃度為45.33ng·m。;地下河水中PAHs濃度平均值為220.98ng‘L;土壤中PAHs濃度為38.72ng·gl;大氣、降雨和土壤中PAHs組成以2~3環(huán)的萘、芴、菲、熒蒽、芘5種為主,地下河水中以芴、菲、熒蒽、芘、苯并[a]蒽、苯并[a]芘6種為主。利用地下河多介質(zhì)中的1
3、6種PAHs成分譜、特征比值結(jié)合它們的物理化學(xué)性質(zhì)進(jìn)行PAHs的源解析,研究顯示大氣干濕沉降是巖溶地下河水中多環(huán)芳烴的主要污染源之一,這歸因于巖溶地區(qū)防污性能的脆弱性。關(guān)鍵詞:多環(huán)芳烴;地下河;大氣干濕沉降;成分譜;多介質(zhì);污染源中圖分類號(hào):P642.25:X523文獻(xiàn)標(biāo)志碼:Adoi:10.3975/cagsb.2014.02.17AtmosphericDepositions,PAHsSourcesofanUndergroundRiver:ACaseStudyoftheQingshuiquanUndergroundRiverK0NGXiang-sheng.MIAOYingKe
4、yLaboratoryofKarstEcosystemandRockyDesertificationControlKarstDynamicsLaboratory,MinistryofLandandResources/Guangxi,InstituteofKamtGeology,ChineseAcademyofGeologicalSciences,Guilin,Guangxi541004Abstract:Inordertoprovetheviewpointthatatmosphericdepositionofpolycyclicaromatichydrocarbons(PAHs)
5、isoneofthepollutionsourcesinkarstundergroundriver,theauthorschoseatypicalundergroundriverwhichisusedasdrinkingwatersourceasastudyobject.ThedryandwetdepositionsandairsamplesinthestudyareawerecollectedbythedryandwetdepositionsamplerandthePUF—passivesampler.withwatersamplesandsoilscollectedinth
6、esameperiod,andthenthesampleswereanalyzedbyusingGC-MSfor16EPAPAHs.TheresultsshowedthatPAHdepositionalfluxesrangedfrom147.26ng。(m。d)~,andweightofPAHsdepositedinthebasinwas1943.8gintwomonths.PAHsmeanconcentrationsinair,dryandwetdepositionsandsoilswere45-33ngm~,38.72ng‘g~and220.98ngL~respective
7、ly,andtheirdominantPAHcompoundswere2-3ringsPAHssuchasnaphthalene,fluorene,phenanthrene,fluorantheneandpyrene,whereasdominantPAHcompoundsintheundergroundriverwerefluorene,phenanthrene,fluoranthene,pyrene,benzo[a]anthraceneandbenzo[a】pyrene.Contrasti