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磁性聚苯胺腐殖酸复合微胶囊的制备及其对水中Cr(Ⅵ)吸附性能研究.docx

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磁性聚苯胺腐殖酸复合微胶囊的制备及其对水中Cr(Ⅵ)吸附性能研究 摘要 本文采用简单的自组装方法制备了磁性聚苯胺腐殖酸复合微胶囊，并对其吸附水中Cr(Ⅵ)离子的性能进行了研究。制备过程中，首先制备了聚苯胺微球作为载体，然后将腐殖酸复合到微球表面，最后引入磁性颗粒制成磁性复合微胶囊。实验结果表明，磁性复合微胶囊对Cr(Ⅵ)离子的吸附率高达98.5%，且吸附能力稳定，再生性能良好。 关键词：磁性复合微胶囊、聚苯胺、腐殖酸、吸附性能 Introduction Cr(Ⅵ)isoneofthemostcommonheavymetalpollutantsinwater.Itiswidelyusedinindustry,butitisharmfultohumanhealthandtheenvironment.Therefore,itisnecessarytodevelopaneffectivemethodtoremoveCr(Ⅵ)fromwater.Adsorptionisoneofthemosteffectivemethodstoremoveheavymetalionsfromwaterduetoitshighefficiency,lowcostandeasyoperation.Amongthem,theuseofadsorbentmicrocapsuleshasattractedmoreandmoreattentionduetotheiruniqueproperties,suchashighspecificsurfacearea,goodmechanicalproperties,andeasyseparation. Inrecentyears,magneticmaterialshavebeenwidelyusedinthefieldofadsorptionduetotheirmagneticsensitivity.Magneticcompositemicrocapsuleshavebettermagneticpropertiesandenvironmentalstabilityduetotheintroductionofmagneticfunctionalgroups.Therefore,thepreparationofmagneticcompositemicrocapsuleshasbecomeanimportantresearchdirectioninthefieldofwatertreatment. Inthisstudy,magneticcompositemicrocapsuleswerepreparedbytheself-assemblymethod,andtheirabilitytoadsorbCr(Ⅵ)ionsinwaterwasinvestigated.Polyanilinemicrosphereswerefirstpreparedascarriers,andthenhumicacidwascomplexedonthesurfaceofmicrospheres.Finally,magneticparticleswereintroducedtomakemagneticcompositemicrocapsules.Theresultsshowedthatthemagneticcompositemicrocapsuleshadhighadsorptioncapacityandstability,andgoodregenerationperformance. Experimentalsection Materials Aniline,ammoniumpersulfate,sodiumhydroxide,hydrochloricacid,humicacid,andferroussulfatewerepurchasedfromSinopharmChemicalReagentCo.,Ltd. Preparationofpolyanilinemicrospheres Polyanilinemicrosphereswerepreparedaccordingtotheliterature(Zhangetal.,2015).Briefly,1gofanilinewasdissolvedin50mLof1mol/LHClsolution,andthen0.5gofammoniumpersulfatewasaddeddropwiseunderstirring.Thereactionwascarriedoutat0°Cfor24h.Theresultingpolyanilinemicrosphereswerewashedseveraltimeswi