简介：Continuousmeasurementsofspeciatedatmosphericmercury（Hg）,includinggaseouselementalmercury（GEM）,particulatemercury（PHg）,andreactivegaseousmercury（RGM）wereconductedinGuizhouProvince,southwesternChina.GuiyangPowerPlant（GPP）,GuiyangWujiangCementPlant,GuizhouAluminumPlant（GAP）,andGuiyangForestPark（GFP）inGuiyangwereselectedasstudysites.AutomaticAtmosphericMercurySpeciationAnalyzers（Tekran2537A）wereusedforGEManalysis.PHgandRGMweresimultaneouslycollectedbyamanualsamplingsystem,includingelutriator,coupler/impactor,KCl-coatedannulardenuder,anda?lterholder.ResultsshowthatdifferentemissionsourcesdominatedifferentspeciesofHg.ThehighestaverageGEMvaluewas22.2±28.3ngám-3andthelowest6.1±3.9ngám-3,fromsamplescollectedatGPPandGAP,respectively.ThemaximumaveragePHgwas1984.9pgám-3andtheminimumaverage55.9pgám-3,alsofromGPPandGAP,respectively.Similarly,thehighestaverageRGMof68.8pgám-3wasmeasuredatGPP,andthelowestlevelof20.5pgám-3wasfoundatGAP.WeconcludethatcoalcombustionsourcesarestillplayingakeyroleinGEM;traf?ccontributessigni?cantlytoPHg;anddomesticpollutiondominatesRGM.