Assessment of Sericin Biosorbent for Selective Dye Removal.pdfVIP

ChineseJournalofChemicalEngineering，20(3)426--432(2012) AssessmentofSericinBiosorbentforSelectiveDyeRemoval 1 INTRoDUCTloN from wate 2 EXPERIM EN IAL Adsorotlonhaslong been recognizedasasimple and econom lCalDrocess torrem ovalotwaterpollut- 2．1 Silksericinbiosorbent ants．Adsorption propertiesofheavym etalsand Der— SlStent organlC com pounas Dy numerous matenaIs havebeenreportedinthepastdecades．Although．in Thesiu(sericinpowderwassuppliedflee—of-charge general，syntheticadsorbentssuchasresin，zeoliteand from Italy．Priorto theadsorption study,the sericin m esoporoussilica 11ave largeaclsorptlon capacltv and powderwasdriedovernightinanovenat373K．Re． good selectivityf0rvariouspollutants 『卜41，biosor— peated boiling wasused to lower the solubility of bentsareconsideredasattractiveaItelTlativesforen— sericin inpowderbytransformingthemoresoluble N～一一～～啪一一一一～晰m一一一～～一一一一～重．一一一一～池一一～～～肼一一一～～躲一一一～m一一～一一一一 vironmentalremediationbecauseoftheirlow costand random coilstructuredprotein intothe lesssoluble availability [5]．Pollutantsincluding dyes [6]，pesti— 13-sheets2『0]．Thebiosorbentwasexaminedbyscanning cides [7]and metalions 8【-10]were successfully electronmicroscope(JEOL6300F)．Th esericinpowder treatedby variousbiosorbentsderived from agricul— wasaRached to the specimen holderby conducting turaland industrialbiomass．Biomass—derived ad— adhesiveandsputter-coatedwitha 10nm goldlayer． sorbentshavebeenexaminedfordyeremovalbysev— Itsspecificsurfaceareaandporestructurewerede— eralresearch groups l『1—19]．Chuah eta1． 『11]and terminedbyN，physisorption (CoulterSA 31oo)． Malik 1『21reposedtheuseofricehuskactivatedcar— while itssurfacechargewerem