The goal of this study was to use natural phosphate (NP) abundant in Algeria, as an adsorbent for the removal of uranium (VI) from aqueous solutions in batch adsorption. A full 2³ factorial extended experimental design was investigated. The factors and levels used during the experiments were; pH (X₁) (1–5), initial U(VI) concentration (X₂) (30–60 mg L⁻¹) and adsorbent dose (X₃) (5–30 g L⁻¹). The properties of NP were characterized by XRF, SEM, EDS, XRD and FTIR before and after adsorption. The effects of factors were explored by response surface methodology. The equilibrium data of U(VI) adsorption onto NP fitted to the Langmuir − 1 model at a maximum monolayer capacity of 11.11 mg g⁻¹ with the kinetics being pseudo-second-order. The characterization of the filtered solid after adsorption revealed the formation of a new lamellar crystal phase of autunite Ca(UO₂)₂(PO₄)₂(H₂O)₆. The calculated value of the mean free energy indicates the chemisorption process. Under optimal conditions, the uranium effluent derived from the precipitation of ammonium uranyl carbonate removal performance of 100% was achieved.

这项研究的目的是使用阿尔及利亚丰富的天然磷酸盐（NP）作为吸附剂，以分批吸附的方式从水溶液中去除铀（VI）。研究了完整的2 ³阶乘扩展实验设计。实验期间使用的因素和水平是：pH（X ₁）（1-5），初始U（VI）浓度（X ₂）（30-60 mg L ^-1）和吸附剂剂量（X ₃）（5-30 g L ^-1）。吸附前后通过XRF，SEM，EDS，XRD和FTIR表征了NP的性质。通过响应面方法探讨了因素的影响。U（VI）吸附到装在Langmuir-1模型上的NP上的平衡数据，其最大单层容量为11.11 mg g ^-1，动力学是伪二级。吸附后过滤后的固体的特征表明，形成了新的层状晶相，并形成了Ca（UO ₂）₂（PO ₄）₂（H ₂ O）₆。平均自由能的计算值表明化学吸附过程。在最佳条件下，实现了由碳酸铀酰碳酸铵沉淀产生的铀废水去除性能为100％。