Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/3365
Full metadata record
DC FieldValueLanguage
dc.contributor.advisorPolat, Hürriyeten
dc.contributor.authorKeleşoğlu, Serkan-
dc.date.accessioned2014-07-22T13:51:23Z
dc.date.available2014-07-22T13:51:23Z
dc.date.issued2007en
dc.identifier.urihttp://hdl.handle.net/11147/3365
dc.descriptionThesis (Master)--İzmir Institute of Technology, Chemistry, İzmir, 2007en
dc.descriptionIncludes bibliographical references (leaves: 126-138)en
dc.descriptionText in English; Abstract: Turkish and Englishen
dc.descriptionxv, 138 leavesen
dc.description.abstractIn this study comparative adsorption studies of heavy metal ions (Cu2+, Pb2+,Cd2+, Ni2+) on chitin and chitosan biopolymers were performed to investigate the uptake performances. For this purpose chitosan was prepared from chitin in controlled experimental conditions and then these biopolymers were characterized with Elemental Analysis, Viscosity, FT-IR, Potentiometric Titration, XRD, SEM, Zeta Potential,Particle Size Distribution and TGA/DTA measurements. Batch adsorption experiments were performed at eight different initial heavy metal ion concentrations (10, 25, 50, 100, 250, 500, 750, 1000 m/L), two different temperatures (298.15 K and 328.15 K), time period ranging from 5 minutes to 1 day and pH of solutions ranging from 1 to 7. The results indicated that the uptake performence of chitin and chitosan biopolymer significantly changed with pH, adsorbent dosage,concentration and temperature. In general, chitosan biopolymer demonstrated greater fixation abbility for heavy metal ions than chitin. However the fixation trend of heavy metal ions on chitin and chitosan biopolymers was the same (Cu2+ > Pb2+ > Cd2+ > Ni2+). Moreover Irwing-Williams Series support the dominancy of the binding mechanism for Cu2+, Cd2+ and Ni2+ ions on both biopolymers. Adsorption of heavy metal ions on both chitin and chitosan biopolymers followed pseudo second order kinetics with the rate constant indicating faster adsorption on chitin for Cu2+ and Pb2+ ions and faster adsorption on chitosan for Cd2+ and Ni2+ ions.Both of the Freundlich and Langmuir adsorption isotherms seem to adequately represent the adsorption data obtained in this study. The positive value of enthalpy change (Ho) and negative value of free energy change (Go) shows the adsorption process is endothermic and spontaneous. Moreover obtained positive entropy changes (So) show that an increase in randomness, is associating the adsorption of metal ions onto chitin and chitosan biopolymers.en
dc.language.isoenen_US
dc.publisherİzmir Institute of Technologyen
dc.publisherIzmir Institute of Technologyen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject.lccQD547. K29 2007en
dc.subject.lcshAdsorptionen
dc.subject.lcshHeavy metals--Absorption and Adsorptionen
dc.subject.lcshMetals ionsen
dc.subject.lcshBiopolymersen
dc.subject.lcshChitinen
dc.subject.lcshChitosanen
dc.titleComparative adsorption studies of heavy metal ions on chitin and chitosan biopolymersen_US
dc.typeMaster Thesisen_US
dc.institutionauthorKeleşoğlu, Serkan-
dc.departmentThesis (Master)--İzmir Institute of Technology, Chemistryen_US
dc.relation.publicationcategoryTezen_US
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.fulltextWith Fulltext-
item.openairetypeMaster Thesis-
Appears in Collections:Master Degree / Yüksek Lisans Tezleri
Files in This Item:
File Description SizeFormat 
T000622.pdfMasterThesis2.64 MBAdobe PDFThumbnail
View/Open
Show simple item record



CORE Recommender

Page view(s)

180
checked on Feb 26, 2024

Download(s)

116
checked on Feb 26, 2024

Google ScholarTM

Check





Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.