预览加载中，请您耐心等待几秒...

EDTA螯合树脂对镉离子的吸附性能探究.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

EDTA螯合树脂对镉离子的吸附性能探究 Title:InvestigationontheAdsorptionPerformanceofEDTAChelatingResinforCadmiumIons Abstract: Cadmium(Cd)isatoxicheavymetalthatposessignificantriskstohumanhealthandtheenvironment.Thedevelopmentofefficientandcost-effectivemethodsforitsremovalfromcontaminatedwaterisofparamountimportance.ThisstudyaimstoexploretheadsorptionperformanceofEDTA(EthyleneDiamineTetraaceticAcid)chelatingresinforCdions.Theexperimentalapproachinvolveddeterminingtheoptimaloperatingconditions,investigatingtheadsorptionkineticsandisotherms,andevaluatingtheregenerationefficiencyoftheEDTAchelatingresin.TheresultsdemonstratedthepotentialofEDTAchelatingresinasapromisingmaterialfortheremovalofCdionsfromwastewater. 1.Introduction: Cdcontaminationinwatersourceshasbecomeacriticalenvironmentalconcernduetoitstoxicityandpersistence.VariousmethodshavebeenemployedfortheremovalofCdions,includingprecipitation,coagulation-flocculation,membranefiltration,andadsorption.Amongthesemethods,adsorptionusingchelatingresinshasgainedsignificantattentionduetotheirhighaffinityandselectivitytowardsmetalions. 2.ExperimentalProcedure: 2.1MaterialPreparation: EDTAchelatingresinwassynthesizedbyimmobilizingEDTAontoanappropriatematrix,suchaspolymericbeadsorsilicagel.Thesynthesizedresinwascharacterizedforitsphysicalandchemicalproperties. 2.2BatchAdsorptionStudies: TheeffectsofvariousparameterssuchasinitialCdconcentration,pH,contacttime,andresindosagewereinvestigatedtodeterminetheirinfluenceontheadsorptionefficiency.TheCdconcentrationwasanalyzedusingatomicabsorptionspectroscopy(AAS). 2.3KineticsandIsothermStudies: Theadsorptionkineticswereexaminedbyfittingtheexperimentaldatatovariouskineticmodels,includingpseudo-first-order,pseudo-second-order,andintra-particlediffusionmodels.TheadsorptionisothermswereanalyzedusingLangmuirandFreundlichmodelstodeterminetheadsorptioncapacityandaffinityoftheresintowardsCdions. 2.4RegenerationStudies: TheregenerationefficiencyoftheEDTAchelatingresinwasassessedusingappropriatedesorptionagen