酸改性膨润土对左氧氟沙星的吸附研究-豆柴文库

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酸改性膨润土对左氧氟沙星的吸附研究
Title:AdsorptionStudyofAcid-ModifiedMontmorilloniteonLevofloxacin
Abstract:
Antibioticpollutionhasbecomeaseriousenvironmentalconcernduetoitsadverseeffectsonhumanandenvironmentalhealth.Inthisstudy,theadsorptionbehaviorofacid-modifiedmontmorilloniteonlevofloxacin,awidely-usedantibiotic,wasinvestigated.Theacidmodificationofmontmorillonitewascarriedoutusingnitricacid,whichenhanceditsadsorptioncapacity.Theexperimentalresultsshowedthattheacid-modifiedmontmorilloniteexhibitedsignificantlyimprovedadsorptionefficiencyforlevofloxacincomparedtotheunmodifiedmontmorillonite.Factorsaffectingtheadsorptionprocess,suchascontacttime,pH,initialconcentrationoflevofloxacin,andtemperature,werealsostudied.Itwasfoundthattheadsorptionprocessfollowedapseudo-secondorderkineticsmodelandcouldbedescribedbytheLangmuirisothermmodel.Thefindingsfromthisstudyprovidevaluableinsightsforthedevelopmentofeffectivestrategiestoremovelevofloxacinfromcontaminatedwatersourcesusingacid-modifiedmontmorillonite.
1.Introduction:
Withthewidespreaduseofantibioticsinhumanandveterinarymedicine,antibioticpollutionhasemergedasasignificantenvironmentalissue.Levofloxacin,athird-generationfluoroquinoloneantibiotic,isextensivelyusedduetoitsbroad-spectrumactivityagainstvariousbacterialinfections.However,theinadequatetreatmentanddisposalofunusedorexpiredantibioticsresultintheirreleaseintonaturalwaterbodies,leadingtoadverseeffectsonhumanandaquaticlife.Therefore,thedevelopmentofefficientmethodsfortheremovalofantibioticsfromcontaminatedwatersourcesisofutmostimportance.
2.MaterialsandMethods:
2.1AcidmodificationofMontmorillonite:
Inthisstudy,montmorillonitewasacid-modifiedusingnitricacid.Theacidtreatmentwascarriedoutbyaddingaspecificvolumeofnitricacidtoapredeterminedamountofmontmorillonite,followedbymixinganddrying.Theacid-modifiedmontmorillonitewasthencharacterizedusingX-raydiffraction(XRD)andFouriertransforminfraredspectroscopy(FTIR)techniquestoconfirmthechangesinitsstructureandsurfaceproperties.
2.2Adsorption