The removal of Cu(II) and Pb(II) ions from aqueous solutions by temperature-sensitive hydrogels based on N-isopropylacrylamide and itaconic acid

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dc.authoridAcar, Işıl / 0000-0001-6274-0387
dc.authorwosidAcar, Işıl / C-8139-2019
dc.contributor.authorÖzkahraman, Bengi
dc.contributor.authorYıldırım, Eren
dc.contributor.authorEmik, Serkan
dc.contributor.authorAcar, Işıl
dc.date.accessioned2021-11-01T15:05:37Z
dc.date.available2021-11-01T15:05:37Z
dc.date.issued2021
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Polimer Malzeme Mühendisliği Bölümü
dc.description.abstractThis study deals with the potential use of poly(N-isopropylacrylamide-co-itaconic acid) temperature-sensitive hydrogels as an adsorbent for the removal of Cu(II) and Pb(II) ions from aqueous solutions. For this aim, the adsorption properties of hydrogels were examined by adsorption capacities, adsorption isotherm, and adsorption kinetics experiments. To describe the adsorption characteristics of hydrogels, the obtained experimental data were evaluated by Langmuir, Freundlich, Redlich-Peterson, and Dubinin-Radushkevich isotherm models. Adsorption kinetics experiments were carried out not only in single systems but also in binary systems where both ions were at equal initial concentrations for competitive adsorption studies. To predict the behaviors of the competitive and non-competitive adsorption process of ions onto hydrogels, the experimental adsorption data were analyzed by the pseudo-first-order model and the pseudo-second-order model. According to non-competitive ion removal findings, the adsorption capacities followed order Cu(II) > Pb(II) for all hydrogels, and the pseudo-second-order kinetic model explained the adsorption properties of the hydrogels. Competitive ion removal studies showed that all hydrogels were selective to Cu(II) ion. Furthermore, in the case of comparative investigations both of competitive Cu(II) and competitive Pb(II) removal by hydrogels, the metal ion removal capacity of N10 hydrogel was found as a bit higher than that of N7.5 and N5 in 48 h. That is, as the acidic group content increased in the hydrogel network, the adsorption capacity values also increased. In addition, the reusability of temperature-sensitive hydrogels seems possible without regeneration or after regenerating with acid, in case the temperature is increased above the LCST. Furthermore, even if it cannot be reused, these hydrogels that retain metal ions reach very small volumes by shrinking when the LSCT is exceeded, and thus they can be eliminated more easily than other conventional gels due to their small size. As a result, this temperature-sensitive hydrogel may propose as an alternative environmentally friendly adsorbent candidate for can be used for water purification and wastewater treatment.
dc.description.sponsorshipResearch Fund of the Istanbul University-Cerrahpasa [3023]en_US
dc.description.sponsorshipThis work was supported by the Research Fund of the Istanbul University-Cerrahpasa, Project Number 3023.en_US
dc.identifier.citationÖzkahraman, B., Yıldırım, E., Emik, S., & Acar, I. (2021). The removal of Cu (II) and Pb (II) ions from aqueous solutions by temperature-sensitive hydrogels based on N-isopropylacrylamide and itaconic acid. Main Group Chemistry, (Preprint), 1-19.
dc.identifier.doi10.3233/MGC-210056
dc.identifier.endpage407en_US
dc.identifier.issn1024-1221
dc.identifier.issn1745-1167
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85117294117
dc.identifier.scopusqualityQ3
dc.identifier.startpage389en_US
dc.identifier.urihttps://doi.org/10.3233/MGC-210056
dc.identifier.urihttps://hdl.handle.net/11491/7343
dc.identifier.volume20en_US
dc.identifier.wosWOS:000705980000014
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorÖzkahraman, Bengi
dc.language.isoen
dc.publisherIos Press
dc.relation.ispartofMain Group Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectHeavy Metal Removalen_US
dc.subjectN-isopropylacrylamideen_US
dc.subjectItaconic Aciden_US
dc.subjectHydrogelen_US
dc.subjectTemperature-sensitiveen_US
dc.subjectAdsorptionen_US
dc.titleThe removal of Cu(II) and Pb(II) ions from aqueous solutions by temperature-sensitive hydrogels based on N-isopropylacrylamide and itaconic acid
dc.typeArticle

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