Ni-Zn/CeO2纳米复合材料用于增强4 - 二的吸附性去除
Nitish Semwal1, Divya Mahar1, Manjunath Chatti2
1Department of Chemistry, DSB Campus, Kumaun University, Nainital, Uttarakhand, 263002, India.
Environmental science and pollution research international
|August 12, 2024
概括
这项研究引入了Ni-Zn/CeO2纳米复合材料,用于去除主要水污染物4-二. NZC 20:10:70复合材料有效地去除了99.1%的污染物,显示了可持续水处理的希望.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 醇是污染水体的重要有机污染物.
- 有效地去除类对于净化水和环境保护至关重要.
研究的目的:
- 为了合成和评估Ni-Zn/CeO2纳米复合物从水溶液中去除4-烯.
- 通过响应表面方法来优化吸附条件,并描述吸附剂的特性.
主要方法:
- 用于合成Ni-Zn/CeO2纳米复合材料的水性共同沉方法.
- 在响应表面的优化方法中进行Box-Behnken设计.
- 使用XRD,TEM,FTIR和泽塔电位分析进行物理表征.
主要成果:
- 鉴定出4-二醇去除的最佳条件是pH3,20°C,120分钟的接触时间,0.05g的吸附剂剂量和50ppm的初始度.
- 在2小时内,NZC 20:10:70纳米复合物 (20% Ni,10% Zn) 实现了99.1%的4-二去除.
- 吸附遵循伪二次动力学和弗洛伊德利希等热,具有很高的表面积 (118.471 m2/g) 和出色的可重复使用性 (85%的效率超过8个周期).
结论:
- Ni-Zn/CeO2纳米复合材料,特别是NZC 20:10:70,是高效的吸附剂,用于去除4-烯.
- 优化过程证明了水处理的可持续和经济可行的方法.
- 该研究强调了工程纳米材料在解决有机水污染方面的潜力.
相关概念视频
00:56Extraction: Advanced Methods
436
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...
436
01:09Colloidal precipitates
535
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
535