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Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study
dc.creator | Milosavljević, Nedeljko | |
dc.creator | Ristić, Mirjana | |
dc.creator | Perić-Grujić, Aleksandra | |
dc.creator | Filipović, Jovanka M. | |
dc.creator | Štrbac, Svetlana | |
dc.creator | Rakočević, Zlatko Lj. | |
dc.creator | Kalagasidis Krušić, Melina | |
dc.date.accessioned | 2021-03-10T11:33:22Z | |
dc.date.available | 2021-03-10T11:33:22Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 0927-7757 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1860 | |
dc.description.abstract | A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles. | en |
dc.publisher | Elsevier Science Bv, Amsterdam | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172007/RS// | |
dc.rights | restrictedAccess | |
dc.source | Colloids and Surfaces A-Physicochemical and Engineering Aspects | |
dc.subject | Hydrogel | en |
dc.subject | Cu2+ adsorption | en |
dc.subject | AFM | en |
dc.subject | Adsorption isotherm | en |
dc.subject | Kinetic model | en |
dc.subject | Desorption | en |
dc.title | Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 69 | |
dc.citation.issue | 1-3 | |
dc.citation.other | 388(1-3): 59-69 | |
dc.citation.rank | M22 | |
dc.citation.spage | 59 | |
dc.citation.volume | 388 | |
dc.identifier.doi | 10.1016/j.colsurfa.2011.08.011 | |
dc.identifier.scopus | 2-s2.0-80052941188 | |
dc.identifier.wos | 000296222700008 | |
dc.type.version | publishedVersion |