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低级脂肪胺氯化生成含氮消毒副产物的研究.docx

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低级脂肪胺氯化生成含氮消毒副产物的研究 Title:StudyonNitrogen-containingDisinfectionBy-productsProducedbyLow-levelFattyAmineChlorination Abstract: Thechlorinationoflow-levelfattyamineshasbeenwidelyusedindisinfectionprocesses.However,thistreatmentmethodmayleadtotheformationofnitrogen-containingdisinfectionby-products(DBPs),whichcanposepotentialriskstohumanhealth.Thisstudyaimstoinvestigatetheformationandcharacteristicsofnitrogen-containingDBPsduringthechlorinationoflow-levelfattyamines.Thefindingswillcontributetoabetterunderstandingofthepotentialrisksassociatedwiththeuseoflow-levelfattyaminechlorinationindisinfectionprocesses. 1.Introduction Chlorinationisacommonlyuseddisinfectionmethodtoeliminateharmfulmicroorganismsinwaterandwastewatertreatmentplants.Low-levelfattyamines,suchassecondaryandtertiaryamines,haveemergedaspromisingdisinfectantsduetotheirhighreactivityandbroad-spectrumantimicrobialactivity.However,chlorinationoflow-levelfattyaminescanresultintheformationofnitrogen-containingDBPs,whichmayhaveadverseeffectsonhumanhealth.Therefore,itiscrucialtoinvestigatetheformationandcharacteristicsoftheseDBPs. 2.FormationMechanismsofNitrogen-containingDBPs Severalreactionsoccurduringlow-levelfattyaminechlorination,leadingtotheformationofnitrogen-containingDBPs.Theprimaryreactionpathwaysincludechloramination,N-chloroaminedecomposition,andchloroaminereactionwithnaturalorganicmatter.Thesereactionscanresultintheformationofvariousnitrogen-containingDBPs,suchaschloroform,haloacetonitriles,andN-nitrosodimethylamine(NDMA). 3.FactorsAffectingtheFormationofNitrogen-containingDBPs Multiplefactorsinfluencetheformationofnitrogen-containingDBPsduringlow-levelfattyaminechlorination.Thesefactorsincludetheinitialchlorine/amineratio,reactionpH,temperature,andreactiontime.UnderstandinghowthesefactorsaffectDBPformationisessentialtooptimizedisinfectionprocessesandminimizeDBPformation. 4.AnalysisandDetectionMethods Accuratedetectionandanalysismethodsarecriticaltoidentifyandquantifynitrogen-containingDBPs.Gaschroma