Three kinds of porous Al₂O₃ materials have been prepared by using different precursors of aluminum via solution-freeze-drying-calcination technology. Meanwhile, the adsorption properties of Al₂O₃-Cl, Al₂O₃-N and Al₂O₃-S adsorbents to U(VI) were estimated and compared. The calculated maximum adsorption amount of porous Al₂O₃ materials at 298 K reached 805.72 mg g⁻¹ for U(VI) (pH = 7.0), which was much higher than that of most of the other metal oxides. Moreover, it is worth mentioning that the remarkable adsorption efficiency was above 90% even after five cycles and the adsorption efficiency was relatively high in the solution with different coexisting ions. Crucially, U(VI) was almost adsorbed completely on Al₂O₃-Cl at the low concentration and only about 0.006 mg L⁻¹ remained in the solution, which was below the permissible limits of the USEPA (0.03 mg L⁻¹) and WHO (0.015 mg L⁻¹). Based on the above results, it could be demonstrated that the novel porous Al₂O₃ materials had broad application prospects for U(VI) removal.

中文翻译：

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通过使用衍生自不同铝前体的新型可持续多孔Al2O3材料有效地去除水溶液中的铀

通过溶液冷冻干燥煅烧技术，使用不同的铝前体制备了三种多孔Al ₂ O ₃材料。同时，估计并比较了Al ₂ O ₃ -Cl，Al ₂ O ₃ -N和Al ₂ O ₃ -S吸附剂对U（VI）的吸附性能。的多孔铝计算出的最大吸附量₂ ö ₃的材料在298K达到805.72毫克克^-1为U（VI（pH = 7.0），远远高于大多数其他金属氧化物。此外，值得一提的是，即使经过五个循环，其显着的吸附效率仍高于90％，并且在具有不同共存离子的溶液中，吸附效率相对较高。至关重要的是，低浓度的U（VI）几乎完全吸附在Al ₂ O ₃ -Cl上，溶液中仅残留约0.006 mg L ^-1，这低于USEPA的允许极限（0.03 mg L ^-1）和WHO（0.015 mg L ^-1）。基于以上结果，可以证明新型的多孔Al ₂ O ₃材料具有去除U（VI）的广阔应用前景。