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1、中国环境科学2011,31(1):1~7ChinaEnvironmentalScience杭州市大气降尘与PM10化学组成特征的研究121*2122徐虹,林丰妹,毕晓辉,焦荔,冯银厂,洪盛茂,刘文高(1.南开大学环境科学与工程学院,国家环境保护城市空气颗粒物污染防治重点实验室,天津300071;2.杭州市环境监测中心站,浙江杭州310007)摘要:2006年6月∼2008年5月,在杭州市采集了大气降尘和PM10样品以及3类PM10源样品,对样品中12种无机元素进行了分析.结果表明,杭州市大气降尘量与PM10浓度相对于国内其他城
2、市均属于较低水平,二者的季节变化存在明显差异;降尘量和PM10浓度的空间分布特征存在相似性,均与人类活动的强度密切相关.空间分布显示除PM10在朝晖和玉泉两采样点的成分谱相似,各采样点降尘和PM10成分谱间的相似性均不高.PM10与各源类成分谱的相似性高于降尘与各源类成分谱的相似性,二者来源的差异可能是造成降尘和PM10化学组分特征不同的原因,其中PM10与城市扬尘的化学成分相似性最高.关键词:杭州;降尘;PM10;化学组成;分歧系数中图分类号:X131.1文献标识码:A文章编号:1000-6923(2011)01-0001-
3、07121*ChemicalcharacteristicsofatmosphericdustfallandPM10inHangzhou.XUHong,LINFeng-mei,BIXiao-hui,2122JIAOLi,FENGYin-chang,HONGSheng-mao,LIUWen-gao(1.StateEnvironmentalProtectionKeyLaboratoryofUrbanAmbientAirParticulateMatterPollutionPreventionandControl,CollegeofEn
4、vironmentalScienceandEngineering,NankaiUniversity,Tianjin300071,China;2.TheEnvironmentalMonitoringCenterStationofHangzhoucity,Hangzhou310007,China).ChinaEnvironmentalScience,2011,31(1):1~7Abstract:SamplesofdustfallandPM10aswellassourcesamplesofPM10werecollectedfromJ
5、une2006toMay2008atfourmonitoringstationsofHangzhouCity.Twelvemetalswerequantified:chromium,manganese,nickel,lead,zinc,cobalt,aluminum,iron,potassium,sodium,calciumandmagnesium.ThedepositeddustamountandconcentrationofPM10waslowerthanmostoftheothercitiesinChina.Thedus
6、tfallandPM10haddifferentseasonalchanging-mode.ThesimilarityofspatialdistributionimplicatedthatboththeamountofdustfallandconcentrationofPM10wereinfluencedbyhumanactivities.ThechemicalcomponentsofPM10betweenZhaohuiandYuquanweresimilar,whereastherewasnohighsimilaritybe
7、tweenPM10anddustfallinthosesamplingstations.CombinedwiththeprofilesofthreePM10sources,thesimilaritybetweenPM10anditssourceswashigherthanthatbetweendustfallandPM10sources.ItindicatedthatthedustfallandPM10mightcomefromdifferentsourcesanditmaycausethedifferencesbetween
8、thechemicalcharacteristicsofthedustfallandthatofPM10.Keywords:Hangzhou;dustfall;PM10;chemicalcomposition;coefficientofdivergence大气颗粒物(PM10