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Adsorption of arsenate on iron(III) oxide coated ethylenediamine functionalized multiwall carbon nanotubes
dc.creator | Veličković, Zlate | |
dc.creator | Vuković, Goran D. | |
dc.creator | Marinković, Aleksandar | |
dc.creator | Moldovan, Maria-Simona | |
dc.creator | Perić-Grujić, Aleksandra | |
dc.creator | Uskoković, Petar | |
dc.creator | Ristić, Mirjana | |
dc.date.accessioned | 2021-03-10T11:55:00Z | |
dc.date.available | 2021-03-10T11:55:00Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 1385-8947 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2202 | |
dc.description.abstract | New criteria in assessing the quality of drinking water reduced the maximum permissible concentration of arsenic from 50 mu g L-1 to 10 mu g L-1 and set a requirement for the development of new technologies for arsenic removal. In this paper, ethylenediamine functionalized multiwall carbon nanotubes (e-MWCNT) were loaded with iron(III) oxide in the goethite form, by precipitation of adsorbed Fe3+ and oxidized Fe2+ using base, in that way e-MWCNT/Fe3+ and e-MWCNT/Fe2+ adsorbents, respectively, were obtained. The influence of pH on the As(V) and As(III) removal from drinking water was studied in a batch system, of pH range 3-10 and initial arsenic concentration 0.05-4 mg L-1. Time dependent As(V) adsorption and adsorption data can be described by pseudo-second-order kinetic model and by Freundlich isotherm, applying linear and non-linear fitting methods. The maximum adsorption capacities obtained from Langmuir model for As(V) on e-MWCNT/Fe2+ and e-MWCNT/Fe3+ were 23.47 and 13.74 mg g(-1) at 25 degrees C. respectively. Thermodynamic parameters showed that the adsorption of As(V) was spontaneous and endothermic for both e-MWCNT/Fe2+ and e-MWCNT/Fe3+. Influences of the pH, iron(III) oxide loading and interfering ions were modeled by MINTEQ program, and good agreement between experimental and modeling data was obtained. | en |
dc.publisher | Elsevier Science Sa, Lausanne | |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/245916/EU// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172007/RS// | |
dc.rights | restrictedAccess | |
dc.source | Chemical Engineering Journal | |
dc.subject | Arsenic | en |
dc.subject | Multiwall carbon nanotubes | en |
dc.subject | Amidation | en |
dc.subject | Adsorption | en |
dc.subject | Iron(III) oxide | en |
dc.title | Adsorption of arsenate on iron(III) oxide coated ethylenediamine functionalized multiwall carbon nanotubes | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 181 | |
dc.citation.other | 181: 174-181 | |
dc.citation.rank | aM21 | |
dc.citation.spage | 174 | |
dc.citation.volume | 181 | |
dc.identifier.doi | 10.1016/j.cej.2011.11.052 | |
dc.identifier.scopus | 2-s2.0-84856334922 | |
dc.identifier.wos | 000301087000018 | |
dc.type.version | publishedVersion |