使用基于ZnCuCr的MOF优化了刚果红染料吸附,用于可持续的废水处理
Mohammad Hasan Al-Omari1, Ahmed Abu-Rayyan1, Ahmed H Ragab2
1Faculty of Science, Applied Science Private University, Amman 11931, Jordan.
Langmuir : the ACS journal of surfaces and colloids
|February 26, 2025
概括
一种新的三金属金属有机框架 (MOF) 有效地去除了刚果红色染料,达到96.5%的效率. 这种稳定,可重复使用的吸附剂显示了可持续废水处理应用的巨大潜力.
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:
- 传统的吸附剂往往缺乏从废水中有效去除染料所需的稳定性和效率.
- 开发具有增强吸附性质的先进材料对于环境修复至关重要.
- 金属有机框架 (MOF) 提供可调节的结构和高表面积,使它们成为污染物清除的有希望的候选者.
研究的目的:
- 为了合成和描述一种新的三金属ZnCuCr-TpIm金属有机框架 (MOF).
- 评估MOF在从水溶液中去除刚果红色染料方面的效率.
- 评估MOF在各种废水条件下的稳定性,可重复使用性和性能.
主要方法:
- 立方 ZnCuCr-TpIm MOF 晶体 (300-500 nm) 的溶热合成.
- 吸附实验,以确定最佳条件 (剂量,温度,pH,接触时间) 刚果红去除.
- 动力 (伪二次) 和等温 (Langmuir) 建模,以了解吸附机制.
- 进行FTIR和XRD分析以确认结构完整性和染料框架相互作用.
- 稳定性测试包括表面积保留,可重复使用周期和金属离子漏评估.
主要成果:
- 在最佳条件下,ZnCuCr-TpIm MOF实现了96.5%的刚果红色去除效率.
- 吸附遵循伪二次动力学和兰迈尔异热模型,最大吸附能力为325 mg/g.
- MOF表现出极好的稳定性,在72小时后保留95%的表面积,在五次重复使用周期后>90%的效率.
- 在模拟废水条件下观察到最小的金属离子浸出 (<1.2 ppm) 和高弹性.
结论:
- 与传统材料相比,三金属ZnCuCr-TpIm MOF具有更好的吸附性能和稳定性.
- Zn,Cu和Cr金属中心的协同作用有助于提高染料去除效率.
- 这种MOF是一种有希望的,可持续的吸附剂,可用于高效和长期的废水处理应用.
更多相关视频
10:44Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
9.8K
05:52Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
Published on: June 2, 2022
2.8K
相关概念视频
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
4.1K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
4.1K
00:56Extraction: Advanced Methods
1.3K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.3K
01:27Microbial Leaching
90
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
90