Yilmaz, SakirZengin, AdemSahan, TekinZorer, Ozlem Selcuk2025-05-102025-05-1020212352-186410.1016/j.eti.2021.1016312-s2.0-85106526529https://doi.org/10.1016/j.eti.2021.101631https://hdl.handle.net/20.500.14720/10202Sahan, Tekin/0000-0001-8776-9338; Yilmaz, Sakir/0000-0001-9797-0959; Selcuk Zorer, Ozlem/0000-0002-6486-8365In the current work, the effect of the poly(2-aminoethyl methacrylate)-grafted kaolin (PAEMA@KLN) was investigated for the potential removal of U(VI) from aqueous samples. This novel adsorbent prepared for U(VI) removal was characterized by various techniques (Fourier transform infrared spectrometry (FTIR), energy-dispersive x-ray analysis (EDX), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS)). Response surface methodology (RSM) was utilized to optimize and model the removal of U(VI) by PAEMA@KLN from aqueous environments. The effects of different parameters such as pH, U(VI) concentration (Co), PAEMA@KLN dosage, and shaking time were optimized by central composite design (CCD) combined with RSM. The optimum points were numerically determined as 5.07 for pH, 35.16 mg/L for Co, 13.73 mg for PAEMA@KLN dosage, and 92.09 min for the shaking time. The maximum removal was obtained at 96.03% under the optimum conditions. The kinetic data was better described by the pseudo-second-order and Weber-Morris models. U(VI) removal onto PAEMA@KLN follows the Langmuir isotherm model. Thermodynamic studies showed that U(VI) removal by PAEMA@KLN was spontaneous and exothermic in nature. The results indicate that PAEMA@KLN is a promising adsorbent for the effective removal of radionuclides like U(VI) from aqueous media. (C) 2021 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessAdsorptionKaolinPolymeric MaterialResponse Surface MethodologyUraniumArticle23Q1Q1WOS:000685014400021