dc.contributor.author | Ulusoy, Ulvi | |
dc.contributor.author | Akkaya, Recep | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T10:14:21Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T10:14:21Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0304-3894 | |
dc.identifier.issn | 1873-3336 | |
dc.identifier.uri | https://dx.doi.org/10.1016/j.jhazmat.2008.06.064 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/10151 | |
dc.description | WOS: 000263439800014 | en_US |
dc.description | PubMed ID: 18656311 | en_US |
dc.description.abstract | Micro-composite of polyacrylamide (PAA) and apatite (Apt) was prepared by direct polymerization of acrylamide in a suspension of Apt and characterized by means of FT-IR, XRD, SEM and BET analysis. The adsorptive features of PAA-Apt and Apt were then investigated for Pb2+, UO22+ and Th4+ in view of dependency on ion concentration, temperature, kinetics, ion selectivity and reusability. Experimentally obtained isotherms were evaluated with reference to Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. Apt in PAA-Apt had higher adsorption capacity (0.81,1.27 and 0.69 mol kg(-1)) than bare Apt (0.28.0.41 and 1.33 mol kg(-1)) for Pb2+ and Th4+, but not for UO22+. The affinity to PAA-Apt increased for Pb2+ and UO22+ but not changed for Th4+. The values of enthalpy and entropy changed were positive for all ions for both Apt and PAA-Apt. Free enthalpy change was Delta G<0. Well compatibility of adsorption kinetics to the pseudo-second-order model predicated that the rate-controlling step was a chemical sorption. This was consistent with the free energy values derived from DR model. The reusability tests for Pb2+ for five uses proved that the composite was reusable to provide a mean adsorption of 53.2 +/- 0.7% from 4 x 10(-3) M Pb2+ solution and complete recovery of the adsorbed ion was possible (98 +/- 1%). The results of this investigation suggested that the use of Apt in the micro-composite form with PAA significantly enhanced the adsorptive features of Apt. (C) 2008 Elsevier B.V. All rights reserved. | en_US |
dc.description.sponsorship | The Research Fund of Cumhuriyet University | en_US |
dc.description.sponsorship | This work was supported by The Research Fund of Cumhuriyet University to which the authors are grateful. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | ELSEVIER SCIENCE BV | en_US |
dc.relation.isversionof | 10.1016/j.jhazmat.2008.06.064 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Adsorption | en_US |
dc.subject | Hydroxyapatite | en_US |
dc.subject | Composite | en_US |
dc.subject | Metal | en_US |
dc.subject | Polyacrylamide | en_US |
dc.title | Adsorptive features of polyacrylamide-apatite composite for Pb2+, UO22+ and Th4+ | en_US |
dc.type | article | en_US |
dc.relation.journal | JOURNAL OF HAZARDOUS MATERIALS | en_US |
dc.contributor.department | [Ulusoy, Ulvi -- Akkaya, Recep] Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey | en_US |
dc.contributor.authorID | AKKAYA, Recep -- 0000-0002-3477-7198 | en_US |
dc.identifier.volume | 163 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.endpage | 108 | en_US |
dc.identifier.startpage | 98 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |