金属有机框架的制造功能化与胺酸从水溶液中吸附基本红色46:动力学,热力学和优化
Roaa T Mogharbel1, Omaymah Alaysuy2, Ibrahim Saleem S Alatawi2
1Department of Chemistry, College of Science, Northern Border University, P.O. Box.1321, Arar 91431, Saudi Arabia.
ACS omega
|April 28, 2025
概括
这项研究介绍了NH2-Ce-MOF,这是一种用于有效地从废水中去除基本红色46 (BR46) 染料的新材料. 这种可重复使用的吸附剂证明了环境修复的高容量和成本效益.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 由合成染料污染的废水带来了重大的环境和健康风险.
- 有效且具有成本效益的染料去除技术对于可持续的水资源管理至关重要.
- 金属有机框架 (Ce-MOFs) 由于其调节性特性,显示出作为吸附剂的希望.
研究的目的:
- 为了合成和表征一种新的谷氨酸功能化的金属有机框架 (NH2-Ce-MOF).
- 研究NH2-Ce-MOF的吸附性能,用于从水溶液中去除基本红色46 (BR46) 染料.
- 优化吸附过程使用统计方法,如Box-Behnken设计和响应表面方法.
主要方法:
- 合成后的Ce-MOF与谷氨酸的功能化.
- 使用XRD,SEM,XPS,EDX和N2吸附/脱附进行表征.
- 吸附实验以确定染料去除效率和能力.
- 同热和动力建模 (Langmuir,伪二阶).
- 热力学研究 (ΔH°, ΔG°, ΔS°).
- 使用盒子-贝恩肯设计 (BBD) 和响应表面方法 (RSM) 的优化.
主要成果:
- NH2-Ce-MOF表现出高的表面积 (1158.8 m2/g) 和高孔积 (0.875 cm3/g).
- 吸附剂在BR46染料中达到454.8mg/g的最大吸附能力.
- 吸附遵循兰格穆尔等温和和伪二阶动力学,表明化学吸附.
- 这个过程是内热和自发的,由多重相互作用驱动.
- 在五个重复使用周期中,NH2-Ce-MOF保持了高效率.
结论:
- NH2-Ce-MOF是一种高效且可重复使用的吸附剂,用于BR46染料去除.
- 该研究展示了染料废水处理的实用和负担得起的解决方案.
- 这些发现突显了功能化MOF在环境修复应用中的潜力.
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