Adsorption of Uranium (VI) from Copper solution using Varion-AP and A500 resins: Kinetics and isotherm study

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2025-02-21 DOI:10.1016/j.molstruc.2025.141830

Amirhossein Wizan , Davood Ghoddocynejad , Mohammad Outokesh , Seyed Mohammad Davachi

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Abstract

This study investigates the adsorption of uranium (VI) using Varion-AP and Purolite A500 resins. These two resins offer significant advantages due to their high adsorption capacity, selectivity, reusability, ease of use, and environmental compatibility. The main objective of this study was to examine the equilibrium. Batch experiments were designed and conducted with varying solution volumes (50–300 mL) and resin. The effects of pH (2.25–4.25), contact time (up to 4 h), and different resin dosages on the adsorption efficiency were studied, and the optimal adsorption was observed at pH 3.25. The Langmuir and Freundlich isotherm models were employed to analyze the equilibrium data at a constant temperature (25 °C) and to determine the adsorption capacity. The adsorption kinetics followed a pseudo-second-order model. The maximum adsorption capacity of Varion-AP and A500 for uranium (VI) was found to be 67.5 mg/g and 51.5 mg/g, respectively. Desorption experiments at different temperatures (25 °C, 40 °C, and 60 °C) revealed optimal desorption points of 480 mg/lit and 400 mg/lit for Varion-AP and A500 resins, respectively. These results suggest the potential of both resins for uranium (VI) recovery.

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.