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Silica based inorganic-organic hybrid materials for the adsorptive removal of chromium

Show simple item record Nayab, S. Baig, H. Ghaffar, A. Tuncel, E. Oluz, Zehra Duran, Hatice Yameen, B. 2019-03-18T08:12:04Z 2019-03-18T08:12:04Z 2018-07-02
dc.identifier.citation Nayab, S., Baig, H., Ghaffar, A., Tuncel, E., Oluz, Z., Duran, H., & Yameen, B. (2018). Silica based inorganic–organic hybrid materials for the adsorptive removal of chromium. RSC Advances, 8(42), 23963-23972.
dc.description.abstract We employed polymer functionalized silica gel as an adsorbent for the removal of Cr(vi) from water. The chains of 2-aminoethyl methacrylate hydrochloride (AEMA·HCl) polymer were grown from the surface of silica gel via surface-initiated conventional radical polymerization and the resulting hybrid material exhibited high affinity for chromium(vi). To investigate the adsorption behavior of Cr(vi) on diverse polymer based hybrid materials, the removal capacity of (SG-AEMH) was compared with our previously reported branched polyamine functionalized mesoporous silica (MS-PEI). The adsorption capacities of polymer based materials were also compared with their respective monolayer based platforms comprising a 3-aminopropyltriethoxysilane (APTES) functionalized silica gel (SG-APTES) and mesoporous silica (MS-APTES). The polymer based systems showed excellent Cr(vi) adsorption efficiencies compared to monolayer counterparts. The structural characteristics and surface modification of these adsorbents were examined by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The experimental data were analyzed using the Langmuir and Freundlich models. Correlation coefficients were determined by analyzing each isotherm. The kinetic data of adsorption reactions were described by pseudo-first-order and pseudo-second-order equations. Thermodynamic parameters, i.e., change in the free energy (ΔG°), the enthalpy (ΔH°), and the entropy (ΔS°), were also evaluated. The synthesized hybrid materials exhibited a high adsorption capacity for chromium ions. Furthermore, they could be regenerated and recycled effectively.
dc.language.iso eng
dc.publisher Royal Society of Chemistry
dc.relation.isversionof 10.1039/c8ra04209h
dc.rights info:eu-repo/semantics/openAccess
dc.subject Heavy-metal ions en_US
dc.subject Functionalized mesoporous silica en_US
dc.subject Aqueous-solution en_US
dc.subject Hexavalent chromium en_US
dc.subject cr(vi) adsorption en_US
dc.subject Selective removal en_US
dc.subject Facile synthesis en_US
dc.subject Waste-water en_US
dc.subject Dıffusive gradients en_US
dc.subject Enhanced removal en_US
dc.title Silica based inorganic-organic hybrid materials for the adsorptive removal of chromium en_US
dc.type article
dc.relation.journal RSC Advances
dc.contributor.department TOBB ETU, Faculty of Engineering, Department of Material Science & Nanotechnology Engineering tr
dc.identifier.volume 8
dc.identifier.issue 42
dc.identifier.startpage 23963
dc.identifier.endpage 23972
dc.contributor.orcid Duran, Hatice [0000-0001-6203-3906]
dc.identifier.wos WOS:000437475600053
dc.identifier.scopus 2-s2.0-85049481039
dc.contributor.tobbetuauthor Duran, Hatice
dc.contributor.tobbetuauthor Oluz, Zehra
dc.contributor.YOKid 18002
dc.contributor.YOKid 21606
dc.identifier.doi 10.1039/c8ra04209h
dc.contributor.wosresearcherID Duran, Hatice [B-1423-2009]
dc.contributor.ScopusAuthorID 56086099200
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı

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