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在Al-MCM-41 (Al = 0.0,1.3和4.4) 中的单元和多元组分西洛吸附 (Al = 0.0,1.3和4.4)

Camila M A C Alves¹, Júlia F Alves², Raimundo C Rabelo-Neto³

¹Universidade Estadual do Ceará (UECE), Fortaleza, Ceará 60740-000, Brazil.

|September 22, 2025

概括

化MCM-41有效吸附线性和循环素,显示出高容量和可重复使用性. 这为在温和条件下清除西洛提供了具有成本效益的解决方案.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
吸附科学吸附科学

背景情况:

线性和循环的 Siloxanes 都是环境污染物.
MCM-41及其添加剂变体是具有污染物吸附潜力的中孔材料.

研究的目的:

为了研究线性 (L5) 和循环 (D4,D5,D6) 石化在纯化和Al-化MCM-41.1上的吸附.
评估吸附剂特性和西洛素特性对吸附能力和动力学的影响.
评估吸附剂在实际应用中的可重复使用性.

主要方法:

通过sol-gel方法合成纯和Al-doped的MCM-41.
使用XRD,SEM-EDS,ICP-OES,FT-IR,N2吸附-脱附,NH3-TPD和NMR进行表征.
在25°C的单元和多元组件系统中进行液相吸附实验.
吸附动力学和回收试验.

主要成果:

与Al-MCM-41 ((30) 和MCM-41.10) 相比,Al-MCM-41 ((30) 和MCM-41.10) 的吸附能力是所有锡洛中最高的.
吸附能力顺序为L5>D4>D5>D6,受素结构,几何和吸附剂酸度的影响.
伪第一阶动力学描述了吸附过程,Al-MCM-41(10) 在三次使用D4吸附后保持了76-100%的容量.

结论:

化 MCM-41 是对线性和循环素的高效吸附剂.
材料的特性,包括酸度和孔隙结构,显著影响吸附性能.
开发的吸附剂提供了一种有希望的,具有成本效益的,可重复使用的解决方案来去除西洛.

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