Abstract
This work studies the removal of uranium ions from chemically leached solutions by sorption using two weak and two strong base anionites. Batch sorption experiments were performed to evaluate the optimum conditions at pH 1.2–2.2, 1.0 g resin dose for 1–12 h contact time at room temperature. These experiments addressed sorption kinetics and sorption isotherm. The maximum sorption capacity reached 55.8 mg/g at room temperature. The kinetics data are well described by the pseudo-second-order kinetic model at initial uranium concentration of 0.62 mg·L−1. To describe sorption kinetics pseudo-first-order, pseudo-second-order and intraparticle diffusion models were proposed. Studies indicated that the sorption of uranium can be fitted by a pseudo-second-order kinetic model very well. Equilibria were described by Langmuir, Freundlich, and Dubinin–Radushkevich equations. The experimental sorption isotherm is successfully described by the Langmuir model.
Highlights
The sorption of uranium ions from aqueous solution plays an important role in the nuclear power industry [1,2,3]
These two ionites show that U(VI) sorption increases to 88% and 90%, respectively, as pH increases showed thewhich best results were achieved at aweak pH ofbase
Usage of various anionites for uranium (VI) sorption was obtained from leaching solution
Summary
The sorption of uranium ions from aqueous solution plays an important role in the nuclear power industry [1,2,3]. The development of this industry is determined by the growing energy consumption and causes an increase in demand for uranium raw materials. Uranium extraction from black shale ore has gained importance [4,5]. All of these black shale processing technologies can be classified as pyrometallurgical and hydrometallurgical methods. The main process of recovering uranium in the hydrometallurgical method is sorption [6,7,8]
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