Chemically functionalized poly(AAm-AMPSA) superadsorbent hydrogels for removal of uranyl from aqueous solutions

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dc.authorid(Caldiran) Isikver, Yasemin/0000-0001-6481-188X
dc.contributor.authorIsikver, Yasemin
dc.contributor.authorAlkan, Nihat
dc.date.accessioned2024-10-26T18:05:37Z
dc.date.available2024-10-26T18:05:37Z
dc.date.issued2024
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractIn the present study, anionic hydrogels, acrylamide (AAm) monomer, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) comonomer were prepared in the presence of two different cross-linkers. Then, super-anionic hydrogels were prepared by converting the amide groups of neutral AAm in anionic hydrogels to hydroxamic acid with hydroxylamine hydrochloride. The hydrogels were characterized by FTIR, SEM, TG, and DSC analyses. Uranyl adsorption in the hydrogels was investigated by spectroscopic, kinetic, and equilibrium studies. It was determined that uranyl adsorption kinetics in hydrogels were compatible with pseudo-second-order and intra-particular diffusion models. It was determined that the uranyl adsorption isotherms on the hydrogels were L-type according to the Giles isotherm classification. Adsorption parameters were calculated by applying Freundlich and Langmuir models to these isotherms. In addition, it was determined that the amount of adsorbed uranyl increased with the increase in adsorbent mass, did not change with temperature, decreased in the range of pH 2-4, and increased at pH 4-7. It was observed that super-anionic hydrogels had the highest adsorption capacity among these new hydrogels. In addition, molecular electrostatic potential (MEP) mapping was performed to predict the reactive regions of the hydrogels. The results showed that the theoretical and experimental data of hydrogels are in agreement with each other. In conclusion, it can be said that the anionic and super-anionic hydrogels prepared in this study are unique hydrogels with fast and effective properties in removing uranyl.
dc.identifier.doi10.1007/s00289-023-05000-3
dc.identifier.endpage1042
dc.identifier.issn0170-0839
dc.identifier.issn1436-2449
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85170840324
dc.identifier.scopusqualityQ2
dc.identifier.startpage1019
dc.identifier.urihttps://doi.org/10.1007/s00289-023-05000-3
dc.identifier.urihttps://hdl.handle.net/20.500.12418/29083
dc.identifier.volume81
dc.identifier.wosWOS:001072827900004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofPolymer Bulletin
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSuper-anionic hydrogel
dc.subjectPolyhydroxamic acid
dc.subjectAcrylamide
dc.subject2-Acrylamido-2-methyl-1-propanesulfonic acid
dc.subjectUranyl
dc.subjectAdsorption
dc.subjectMolecular electrostatic potential (MEP)
dc.titleChemically functionalized poly(AAm-AMPSA) superadsorbent hydrogels for removal of uranyl from aqueous solutions
dc.typeArticle

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