用于有效吸附各种染料的BA-CD复合聚合物及其机制:基于讨论的热动态和运动研究
Zhaona Liu1, Make Li2, Yangyang Zheng2
1Department of Pharmacy, Medical School, Xi'an Peihua University, Xi'an 710125, China.
Polymers
|September 13, 2025
概括
酸/β-CD基聚合物 (BA-CD) 能有效吸附有机染料,在RB染料中达到733.2 mg g-1的高容量. 这些聚合物在潜在的染料废水处理应用中显示出出色的可重复使用性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 聚合物化学 聚合物化学
背景情况:
- 层次性的多孔结构和功能组是分子识别的关键.
- 有机染料带来了环境挑战,需要有效的去除方法.
- 基于酸/β-CD的聚合物 (BA-CD) 具有污染物吸附的潜力.
研究的目的:
- 为了研究BA-CD对阴离子和阴离子有机染料的吸附性能.
- 为了确定染料吸附的最佳条件 (pH,时间,度,温度).
- 为了评估BA-CD的吸附机制,动力学,异热和可重复使用性.
主要方法:
- 在不同条件下对吸附性能进行实验研究.
- 动力和同热模型 (近二阶和兰格穆尔模型).
- 吸附过程的表征和可重复使用性测试.
主要成果:
- BA-CD具有很高的吸附能力,特别是对于RB染料 (733.2 mg g-1).
- 吸附遵循准二阶动力学和兰木尔异热模型,表明化学吸附.
- BA-CD显示了高的可重复使用性 (MG染料的5个循环后90%).
结论:
- 由于其多孔结构和功能组,BA-CD是有机染料的高效吸附剂.
- 吸附机制涉及化学吸附,与动力和异温模型相适应.
- BA-CD显示出在染料废水处理中实践应用的巨大潜力.
相关概念视频
01:29Adsorption Isotherms I
Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed molecules.Consider the...
01:25Adsorption Isotherms II
Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...