Fenton氧化降解水中磺胺甲恶唑的研究-豆柴文库

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Fenton氧化降解水中磺胺甲恶唑的研究
Title:FentonOxidationfortheDegradationofSulfamethoxazoleinWater
Abstract:
Sulfamethoxazole(SMX),awidelyusedantibiotic,hasbeendetectedasacontaminantinwaterbodies,raisingconcernsduetoitspotentialenvironmentalimpactandadversehealtheffects.ThisstudyinvestigatestheapplicationofFentonoxidationforthedegradationofSMXinwater.TheFentonprocessinvolvesthegenerationofhighlyreactivehydroxylradicals(•OH)throughthereactionbetweenhydrogenperoxide(H2O2)andaferrousioncatalyst(Fe2+).TheefficiencyoftheFentonprocessinthedegradationofSMXwasevaluatedbyanalyzingthedegradationkinetics,influencingfactors,andtheformationofdegradationby-products.
1.Introduction:
Thepresenceofpharmaceuticalcompounds,suchasantibiotics,inwatersourceshasraisedsignificantenvironmentalandhealthconcerns.Sulfamethoxazole(SMX)isacommonlydetectedantibioticinwaterbodiesduetoitsincompleteremovalduringconventionalwastewatertreatmentprocesses.TheaccumulationofSMXintheenvironmentcanhavenegativeimpactsonaquaticecosystemsandmaycontributetothedevelopmentofantibioticresistance.Therefore,effectivestrategiesfortheremovalanddegradationofSMXarenecessarytomitigatetheseenvironmentalissues.
2.FentonProcessforSMXDegradation:
TheFentonoxidationprocesshasproventobeaneffectiveadvancedoxidationprocess(AOP)forthedegradationoforganiccontaminantsinwater.Theprocessinvolvesthegenerationofhydroxylradicals(•OH),whicharehighlyreactiveandcanoxidizeawiderangeoforganicpollutants.IntheFentonprocess,H2O2isusedastheoxidant,andFe2+actsasacatalysttofacilitatethegenerationof•OH.The•OHradicalsattackthestructureofSMX,leadingtoitsdegradationintosmallerandlessharmfulby-products.
3.DegradationKinetics:
ThedegradationkineticsofSMXduringFentonoxidationwereanalyzedtodeterminetheoptimalreactionconditions.FactorssuchasinitialSMXconcentration,H2O2dosage,Fe2+concentration,pH,andtemperaturewereinvestigated.Thedegradationratefollowedpseudo-first-orderkinetics,andthereactionrateconstant(k)wasdetermined.TheresultsindicatedthathigherH2O2andFe2+concentrat