Adsorption of uranium ions from aqueous solutions by graphene-based zinc oxide nanocomposites
Makaleler > Tam Makale · 2023
Yazarlar: İkbal Gözde KAPTANOĞLU, Sabriye YUŞAN
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, SCI İndekslerine Giren Dergi, Uluslararası, Wos, 2023, cilt 332, ss 4705-4719
DOI: 10.1007/s10967-023-08876-7
Özet
In this paper, adsorption potentials of U(VI) ions were investigated using graphene-based zinc oxide nanocomposites which are graphene oxide-zinc oxide (GO-ZnO) and reduced graphene oxide-zinc oxide (rGO-ZnO). Kinetic data showed that processes could be simulated with pseudo-second-order with high correlation coefficient (R-2 > 0.99). Experimental results of equilibrium adsorption results show that Langmuir fits the data better. The maximum sorption capacities of GO-ZnO at pH 5.0 was 476.19 mg/g, and rGO-ZnO at pH 5.5 was 256.41 mg/g at 298 K. Thermodynamic parameters indicate that the adsorption of U(VI) on GO-ZnO and rGO-ZnO are spontaneous and endothermic.