实验室模拟研究硫酸铵和甘氨酸对乙醇醛与胺反应体系生成棕碳的影响（英文）-豆柴文库

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实验室模拟研究硫酸铵和甘氨酸对乙醇醛与胺反应体系生成棕碳的影响（英文）
Title:ALaboratorySimulationStudyontheEffectsofAmmoniumSulfateandGlycineontheFormationofBrownCarbonintheEthanolAldehyde-AmineReactionSystem
Abstract:
Theformationofbrowncarbon(BrC)intheatmospherehassignificantimplicationsforairqualityandclimatechange.Inthislaboratorysimulationstudy,weinvestigatetheeffectsofammoniumsulfate(AS)andglycineontheformationofBrCinthereactionsystemofethanolaldehydeandamine.ThestudyaimedtodeterminetheinfluenceofthesetwospeciesontheopticalpropertiesandchemicalcompositionsofBrC.TheresultsprovideinsightsintothepotentialroleofASandglycineintheformationandevolutionofBrCintheatmosphere.
1.Introduction:
Browncarbonisaclassoflight-absorbingorganicaerosolsthatsignificantlyinfluencetheEarth'sradiativebalanceandairquality.Itoriginatesfromvarioussources,includingbiomassburning,emissionsfromfossilfuels,andatmosphericreactionsinvolvingvolatileorganiccompounds(VOCs).Understandingitsformationandpropertiesiscrucialforaccurateclimatemodelingandairpollutionmanagement.Inthisstudy,weinvestigatetheeffectsofASandglycineontheformationofBrCinacontrolledlaboratorysetting.
2.ExperimentalMethodology:
Thelaboratoryexperimentswereperformedusingareactorsystemdesignedtosimulateatmosphericconditions.EthanolaldehydeandaminewerechosenasrepresentativeVOCs.DifferentconcentrationsofASandglycinewereintroducedintothereactionsystem.TheopticalpropertiesofBrCwereanalyzedusingaspectrophotometer,whilechemicalcompositionsweredeterminedusinghigh-resolutionmassspectrometry.
3.ResultsandDiscussion:
TheadditionofASandglycinetothereactionsystemshowedvaryingeffectsontheformationofBrC.ThepresenceofASresultedinanincreaseinbothabsorptionandscatteringpropertiesofBrC,indicatingenhancedlightabsorptionandpotentialimpactsonclimate.Thisobservationcouldbeexplainedbytheformationofammoniumsaltsduringthereaction.Glycine,ontheotherhand,demonstratedaclearinfluenceonthechemicalcompositionofBrC,leadingtotheformationofnitrogen-containingspecies.Thesenitrogen-containingspeciesc