Abstract
Using the waste basalt powder, ferric chloride (FeCl3·6H2O), ferrous sulfate (FeSO4·7H2O), 3-aminotrimethoxysilane (3-TMSPT) and Chitosan (CTS) as raw materials, through hydrothermal synthesis, in-situ synthesis, cross-linking and grafting methods, the amino-modified chitosan/magnetic zeolite composite (NH2-CTS/MZ) was prepared. The samples were characterized by SEM, XRD, VSM, BET, FTIR and XPS. The removal ability and adsorption mechanism of U(VI) in an aqueous solution by NH2-CTS/MZ were systematically studied. The results showed that under the conditions of 308 K and pH = 5, NH2-CTS/MZ reached adsorption equilibrium within 180 min, and the equilibrium adsorption capacity was 749.5 mg·g−1. The adsorption isotherm conforms to the Langmuir isotherm model (R2 = 0.998), and the adsorption kinetics conforms to the quasi-secondary kinetic model (R2 = 0.987). The adsorption behaviour is a spontaneous endothermic process. This study shows that NH2-CTS/MZ has a good application prospect in the removal of uranyl ions.
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This study was financially supported by the Natural Science Foundation of Hunan Province (2021JJ30568)
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Deng, M., Ai, Y., Zhao, L. et al. Preparation of NH2-CTS/MZ composites and their adsorption behavior and mechanism on uranium ions. J Radioanal Nucl Chem 330, 963–978 (2021). https://doi.org/10.1007/s10967-021-07991-7
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DOI: https://doi.org/10.1007/s10967-021-07991-7