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<p>This study investigates ZSM-5 zeolite modified by post-synthesis desilication and dealumination to enhance uranyl ion adsorption in aqueous solutions. Materials were characterized using XRD, FTIR, SEM, and nitrogen adsorption–desorption analyses. Adsorption capacities reached 6, 2.5, and 9&#xa0;mg&#xa0;g<sup>−1</sup> for ZSM-5, ZSM-5 Dealuminated, and ZSM-5 Desilicated respectively, over 10–300&#xa0;mg&#xa0;L<sup>−1</sup> uranium concentrations. ZSM-5 Desilicated showed superior performance. Uranium(VI) adsorption followed the Langmuir isotherm and pseudo-second-order kinetics. The adsorption efficiencies of uranyl ions are of the order of 66, 89, and 33% on the ZSM-5, ZSM-5 Desilicated and ZSM-5 Dealuminated respectively with a real solution.</p>

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Study of the effect of dealumination and desilication on the structural properties of ZSM-5 zeolite. Application in the adsorption of uranium from aqueous effluents

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • Oudjer Faiza,
  • Khemaissia Sihem,
  • Bennemla Messaoud,
  • Bendjeriou Fatiha,
  • Khenich Ahmed Rami

摘要

This study investigates ZSM-5 zeolite modified by post-synthesis desilication and dealumination to enhance uranyl ion adsorption in aqueous solutions. Materials were characterized using XRD, FTIR, SEM, and nitrogen adsorption–desorption analyses. Adsorption capacities reached 6, 2.5, and 9 mg g−1 for ZSM-5, ZSM-5 Dealuminated, and ZSM-5 Desilicated respectively, over 10–300 mg L−1 uranium concentrations. ZSM-5 Desilicated showed superior performance. Uranium(VI) adsorption followed the Langmuir isotherm and pseudo-second-order kinetics. The adsorption efficiencies of uranyl ions are of the order of 66, 89, and 33% on the ZSM-5, ZSM-5 Desilicated and ZSM-5 Dealuminated respectively with a real solution.