水热修饰对马六合绿色粘土矿物质吸附性能的影响
Enwen Wang1, Teng Huang2,3, Qian Wu1
1School of Resources and Environmental Engineering, Anshun University, Anshun 561000, China.
Molecules (Basel, Switzerland)
|May 11, 2024
概括
水热修饰显著增强了以粘土为基础的吸附剂,用于从废水中去除马拉绿色染料. 改性材料在吸附能力上显示56.92%的增加,在净化水中有效.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学 化学 化学
背景情况:
- 自然吸附剂通常在效率和容量上有局限性.
- 人工修饰旨在克服这些缺点,以提高性能.
- 粘土矿物质如雷克托里特,本托尼特和甲考林是有前途的基材.
研究的目的:
- 为了研究水热修饰的粘土材料对吸附马拉绿色 (MG) 染料的有效性.
- 为了比较改性 (CM-HT) 和未改性 (CM) 粘土材料的吸附能力.
- 阐明导致增强吸附的结构和化学变化.
主要方法:
- 制备水热修饰 (CM-HT) 和未修饰 (CM) 粘土吸附剂.
- 使用BET,FT-IR,SEM和XRD技术进行表征.
- 使用含有马拉绿色染料的废水进行吸附实验.
主要成果:
- 最佳的热水变形条件:150°C,2小时,液体/固体比为1:20.
- 对于MG,CM-HT的最大吸附能力为290.45mg/g,比CM增加了56.92%.
- 在理论上,CM-HT的最大容量为625.15mg/g,比CM高186.15%.
- 水热修饰放松了晶体结构,增加了层间间距,并创造了更活跃的吸附点.
结论:
- 水热修饰大大提高了 malachite 绿色染料的粘土基材料的吸附性能.
- 增强的吸附性归因于表面积的增加,晶体结构的改变,以及更活跃的位点的产生.
- 化学吸附是主要的机制,物理吸附起到次要作用.
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