The thermal insertion of ceria into the structural framework of Montmorillonite (Mt) clay and the efficiency in Cr (VI) oxyanions removal from the aqueous medium are reported herein. CeO₂/Mt adsorbent was synthesized via a one-pot thermal treatment operation. Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy-Dispersive X-ray (EDX), X-Ray Diffraction (XRD), and Point Zero Charge (PZC) were used for the material characterization. Incorporating cerianite into the clay mineral framework resulted in the overall charge-shift of the Mt/CeO₂ composite and improved stability. Experimental data were analyzed using the non-linear kinetic and equilibrium adsorption isotherm equations. The values of the Chi-square (χ² ≤ 0.1167) showed that Cr (VI) uptake proceeded via chemisorption (similar to Lewis acid-base interaction) and monolayer adsorption. The change in the initial Cr (VI) concentration, the solution ionic strength, and pH value impacted the process efficiency for Cr(VI) removal. At low initial Cr (VI) concentration and initial solution pH value of 5.1, about 100% removal efficiency was achieved within 90 mins. The value of the Langmuir monolayer adsorption capacity obtained was 52.08 mg/g. The as-synthesized CeO₂/Mt composite is a promising adsorbent for the treatment of water contaminated with Cr (VI) oxoanions.

本文报道了将二氧化铈热插入到蒙脱石（Mt）粘土的结构框架中以及从水性介质中去除Cr（VI）含氧阴离子的效率。通过一锅法热处理操作合成了CeO ₂ / Mt吸附剂。傅立叶变换红外（FTIR），扫描电子显微镜（SEM），透射电子显微镜（TEM），能量色散X射线（EDX），X射线衍射（XRD）和零点电荷（PZC）用于材料表征。将铈陶石掺入粘土矿物骨架中导致Mt / CeO ₂复合材料的整体电荷移动并提高了稳定性。使用非线性动力学和平衡吸附等温线方程分析了实验数据。卡方的（值χ ²≤0.1167）表明Cr（VI）的吸收通过化学吸附（类似于路易斯酸碱相互作用）和单层吸附进行。初始Cr（VI）浓度，溶液离子强度和pH值的变化影响了Cr（VI）去除的工艺效率。在较低的初始Cr（VI）浓度和初始溶液pH值为5.1的情况下，在90分钟内达到了约100％的去除效率。所获得的Langmuir单层吸附容量的值为52.08mg / g。合成后的CeO ₂ / Mt复合材料是用于处理被Cr（VI）含氧阴离子污染的水的有前途的吸附剂。