Metal-chelating properties of poly(2-hydroxyethyl methacrylate-methacryloylamidohistidine) membranes

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dc.contributor.authorDenizli, Adil
dc.contributor.authorBektaş, Sema
dc.contributor.authorArıca, Yakup
dc.contributor.authorGenç, Ömer
dc.date.accessioned2020-06-25T17:40:27Z
dc.date.available2020-06-25T17:40:27Z
dc.date.issued2005
dc.departmentKırıkkale Üniversitesi
dc.description.abstractMetal-chelating membranes have advantages as adsorbents in comparison with conventional beads because they are not compressible and they eliminate internal diffusion limitations. The aim of this study was to explore in detail the performance of poly (2-hydroxyethyl methacrylate-methacryloylamidohistidine) [poly(HEMA-MAH)] membranes for the removal of three toxic heavy-metal ions-Cd(II), Pb(II), and Hg(II)-from aquatic systems. The poly(HEMA-MAH) membranes were characterized with scanning electron microscopy and H-1-NMR spectroscopy. The adsorption capacity of the poly(HEMA-MAH) membranes for the selected heavy-metal ions from aqueous media containing different amounts of these ions (30-500 mg/L) and at different pH values (3.0-7.0) was investigated. The adsorption capacity of the membranes increased with time during the first 60 min and then leveled off toward the equilibrium adsorption. The maximum amounts of the heavy-metal ions adsorbed were 8.2, 31.5, and 23.2 mg/g for Cd(II), Pb(II), and Hg(II), respectively. The competitive adsorption of the metal ions was also studied. When the metal ions competed, the adsorbed amounts were 2.9 mg of Cd(II)/g, 14.8 mg of Pb(II)/g, and 9.4 mg of Hg(II)/g. The poly(HEMA-MAH) membranes Could be regenerated via washing with a solution of nitric acid (0.01M). The desorption ratio was as high as 97%. These membranes were suitable for repeated use for more than three adsorption/desorption cycles with negligible loss in the adsorption capacity. The stability constants for the metal-ion/2-methacryloylamidohistidine complexes were calculated to be 3.47 x 10(6), 7.75 x 10(7), and 2.01 x 10(7) L/mol for Cd(II), Pb(II), and Hg(II) ions, respectively, with the Ruzic method. (c) 2005 Wiley Periodicals, Inc.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1002/app.21864
dc.identifier.endpage1219en_US
dc.identifier.issn0021-8995
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-23844528558
dc.identifier.scopusqualityQ2
dc.identifier.startpage1213en_US
dc.identifier.urihttps://doi.org/10.1002/app.21864
dc.identifier.urihttps://hdl.handle.net/20.500.12587/3447
dc.identifier.volume97en_US
dc.identifier.wosWOS:000230123500064
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherJohn Wiley & Sons Incen_US
dc.relation.ispartofJournal Of Applied Polymer Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectmembranesen_US
dc.subjectadsorptionen_US
dc.subjecthydrophilic polymersen_US
dc.titleMetal-chelating properties of poly(2-hydroxyethyl methacrylate-methacryloylamidohistidine) membranesen_US
dc.typeArticle

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