Mesoporous MnO2/SBA-15 was prepared by a facile route using KMnO4 and MnCl2 as Mn source and used for removal of Cs+. The effects of MnO2 content, initial Cs+ concentration, contact time and pH on the Cs+ adsorption behavior were investigated. It was found that Cs+ adsorption capacity of SBA-15 can be significantly improved by MnO2 loading. The adsorption capacity increased with increasing MnO2 content. Furthermore, the adsorption data can be well fitted by the Langmuir model, and the calculated maximum adsorption capacity of 80%MnO2/SBA-15 is 104.8 mg/g. The Cs+ adsorption process can be better described by the pseudo-second-order model.

中文翻译：

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介孔MnO2/SBA-15的制备及其对铯离子的吸附性能

介孔 MnO2/SBA-15 是通过使用 KMnO4 和 MnCl2 作为 Mn 源的简便途径制备的，用于去除 Cs+。研究了MnO2含量、初始Cs+浓度、接触时间和pH对Cs+吸附行为的影响。发现负载MnO2可以显着提高SBA-15的Cs+吸附能力。吸附容量随着MnO2含量的增加而增加。此外，Langmuir 模型可以很好地拟合吸附数据，计算出 80%MnO2/SBA-15 的最大吸附量为 104.8 mg/g。Cs+吸附过程可以用伪二阶模型更好地描述。