作为有机染料去除的高性能吸附剂的磁性β-环氧/UiO-66混合复合材料
Zongli Ren1, Yali Fang1, Qiong Wu1
1School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, PR China.
Langmuir : the ACS journal of surfaces and colloids
|August 21, 2025
概括
一种新的磁性复合物UiO-66@β-CD@Fe3O4有效地从废水中去除刚果红色和水晶紫色染料. 这种可重复使用的吸附剂具有高容量和易于磁性分离,为染料污染提供了有前途的解决方案.
科学领域:
- 材料科学
- 环境化学
- 纳米技术
背景情况:
- 染料废水对环境构成重大挑战,需要开发有效且可重复使用的吸附材料.
- 传统的染料去除方法往往不有效或产生二次污染.
研究的目的:
- 合成和描述一个用β-cyclodextrin (UiO-66@β-CD@Fe3O4) 修改的磁性UiO-66复合物.
- 评估复合材料在水溶液中的晶紫色和刚果红色染料的吸附性能.
- 研究吸附机制,动力学,热力学和开发的吸附剂的可重复使用性.
主要方法:
- 合成UiO-66@β-CD@Fe3O4磁性复合物
- 测试染料去除效率的批量吸附实验.
- 使用动力模型 (伪二次) 和异热模型 (Langmuir) 的分析.
- 热力学研究以了解吸附自发性和机制.
- 通过多个吸附-脱吸周期评估吸附剂的可重复使用性.
主要成果:
- UiO-66@β-CD@Fe3O4复合物显示出高吸附能力:刚果红色为542.75 mg/g,晶紫色为377.25 mg/g.
- 吸附遵循伪二次动力学和兰木尔等热,表明化学吸附和单层吸附.
- 热力学分析显示了内热和自发吸附过程.
- 磁性复合材料在几个循环中表现出极好的可重复使用性,吸附性能损失最小.
- 易于磁性分离可以有效地回收吸附剂.
结论:
- UiO-66@β-CD@Fe3O4是一种高效,可重复使用和磁性可分离的吸附剂,用于去除刚果红色和水晶紫色染料.
- 该材料具有强大的吸附能力和可回收性,突出显示其在染料污染废水处理中的实际应用潜力.
- 该研究证实了UiO-66,β-CD和Fe3O4在增强染料吸附和促进分离方面的协同作用.
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