CeO₂ powders were synthesized via a solution combustion method. The product was characterized by X-ray diffraction scanning electron microscope, and BET surface area analysis. The results indicated that the CeO₂ powders present a foaming state with a surface area of 28.17 m² g^–1. The adsorption performance of the CeO₂ powders was tested toward the removal of typical pollutants of Cr(VI) and Congo red (CR). The results showed that the adsorption of Cr(VI) and CR onto CeO₂ powders followed the Langmuir isotherm model and pseudo-second-order kinetics, with an adsorption capacity of 5.69 mg g^–1 and 35.51 mg g^–1, respectively.

中文翻译：

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CeO2粉体溶液燃烧合成及其在水处理中的应用

CeO ₂粉末通过溶液燃烧法合成。采用X射线衍射扫描电子显微镜、BET比表面积分析对产物进行了表征。结果表明，CeO ₂粉末呈发泡状态，表面积为28.17 m ² g ^-1。测试了CeO ₂粉末对Cr(VI)和刚果红(CR)典型污染物的吸附性能。结果表明，Cr(VI)和CR在CeO ₂粉末上的吸附遵循Langmuir等温线模型和准二级动力学，吸附量分别为5.69 mg g ^-1和35.51 mg g ^-1。