Composite magnetic sorbents based on magnetic Fe₃O₄ coated by Zn and Al layered double hydroxide for U(VI) removal from aqueous media

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发表日期：

2024年2月1日

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N. P. Ivanov,
A. N. Dran’kov,
O. O. Shichalin,
A. O. Lembikov,
I. Yu. Buravlev,
V. Yu. Mayorov,
M. I. Balanov,
K. A. Rogachev,
G. D. Kaspruk,
S. M. Pisarev,
P. A. Marmaza,
V. L. Rastorguev,
V. A. Balybina,
A. N. Fedorets,
V. O. Kaptakov,
E. K. Papynov

摘要

Composite sorbents based on Fe₃O₄ and Zn-Al-LDH with different weight ratios of magnetic and sorbing phases were obtained by the precipitation method. The optimal weight ratio of Zn/Fe was 16, which resulted in a 62% increase in hydromechanical strength. The maximum sorption exchange capacity towards U(VI) was 268.65 ± 22.22 mg/g. The efficiency of U(VI) adsorption was not affected by the presence of Cl⁻, SO₄²⁻, NO₃⁻ and Na⁺, Ca²⁺. The distribution coefficient in a groundwater model solution was K_d(U(VI) = 0.5–3 × 10⁵ mL/g. The materials possess high exchange capacity and selectivity, which makes them suitable sorbents for U(VI) removal.

Composite magnetic sorbents based on magnetic Fe3O4 coated by Zn and Al layered double hydroxide for U(VI) removal from aqueous media

摘要

Composite magnetic sorbents based on magnetic Fe₃O₄ coated by Zn and Al layered double hydroxide for U(VI) removal from aqueous media