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Removal of cadmium from aqueous solutions by oxidized and ethylenediamine-functionalized multi-walled carbon nanotubes
dc.creator | Vuković, Goran D. | |
dc.creator | Marinković, Aleksandar | |
dc.creator | Čolić, Miodrag | |
dc.creator | Ristić, Mirjana | |
dc.creator | Aleksić, Radoslav | |
dc.creator | Perić-Grujić, Aleksandra | |
dc.creator | Uskoković, Petar | |
dc.date.accessioned | 2021-03-10T11:23:56Z | |
dc.date.available | 2021-03-10T11:23:56Z | |
dc.date.issued | 2010 | |
dc.identifier.issn | 1385-8947 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1714 | |
dc.description.abstract | Surface functionalization of multi-walled carbon nanotubes (MWCNTs) by ethylenediamine, via chemical modification of carboxyl groups, using O-(7-azabenzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate, was performed. The resulting materials were characterized by different techniques, such as FTIR, TGA and elemental analysis. Biocompatibility studies showed that the functionalized MWCNTs, at concentrations between 1 and 50 mu g mL(-1), were not cytotoxic for the fibroblast L929 cell line. In batch tests, the influences of solution pH, contact time, initial metal ion concentration and temperature on the sorption of Cd2+ ions onto raw-MWCNTs (raw-MWCNT), oxidized MWCNTs (o-MWCNT) and ethylenediamine-functionalized MWCNTs (e-MWCNT) were studied. The adsorption of Cd2+ ions by o-MWCNT and e-MWCNT was strongly pH dependent. The time dependent Cd2+ sorption onto raw-MWCNT, o-MWCNT and e-MWCNT can be described by a pseudo-second-order kinetic model. The Langmuir isotherm model agrees well with the equilibrium experimental data. The maximum capacity was obtained for e-MWCNT, 25.7 mgg(-1), at 45 degrees C. The thermodynamic parameters were also deduced for the adsorption of Cd2+ ions on raw-MWCNT, o-MWCNT and e-MWCNT and the results showed that the adsorption was spontaneous and endothermic. | en |
dc.publisher | Elsevier Science Sa, Lausanne | |
dc.relation | info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142006/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142002/RS// | |
dc.rights | restrictedAccess | |
dc.source | Chemical Engineering Journal | |
dc.subject | Cadmium adsorption | en |
dc.subject | Carbon nanotubes | en |
dc.subject | Amino-functionalization | en |
dc.subject | Cytotoxicity | en |
dc.title | Removal of cadmium from aqueous solutions by oxidized and ethylenediamine-functionalized multi-walled carbon nanotubes | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 248 | |
dc.citation.issue | 1 | |
dc.citation.other | 157(1): 238-248 | |
dc.citation.rank | aM21 | |
dc.citation.spage | 238 | |
dc.citation.volume | 157 | |
dc.identifier.doi | 10.1016/j.cej.2009.11.026 | |
dc.identifier.scopus | 2-s2.0-75349108796 | |
dc.identifier.wos | 000274772100030 | |
dc.type.version | publishedVersion |