选择性,有效和快速去除阴离子和阴离子有机染料,使用各种定制的聚合物涂层 (PEG,PVP,PAA/粉) 磁性纳米颗粒
Hawra A AlSabbagh1, Kawthar M AlDamestani1, Wael A Amer1,2
1Department of Chemistry, College of Science, University of Bahrain, Sakhir 32038, Bahrain. khboubbou@uob.edu.bh.
Physical chemistry chemical physics : PCCP
|August 1, 2025
概括
用聚合物涂覆的新型磁纳米粒子 (MNP) 有效地从废水中去除阳离子和阴离子染料. 这些纳米吸收剂提供快速,高容量的吸附,可以重复使用,显示了水处理的巨大潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 纳米技术 纳米技术
背景情况:
- 从工业废水中有效地去除有机染料是一个重大的环境挑战.
- 现有的纳米吸收剂往往在对阳离子和阴离子染料的选择性和容量方面扎.
- 磁纳米颗粒 (MNP) 的发展为水处理中容易分离和重复使用提供了潜力.
研究的目的:
- 设计和合成聚合物涂层磁性纳米粒子 (MNP) 以有效去除阳离子和阴离子有机染料.
- 研究这些新型纳米吸收剂的吸附性能,选择性和可重复使用性.
- 通过实验和理论 (DFT) 方法阐明吸附机制.
主要方法:
- 聚合物涂层MNP (PVP,PEG,PAA/粉) 的合成和表征 (TEM,XRD,FTIR,VSM).
- 使用刚果红色 (CR) 和甲蓝色 (MB) 的染料吸附研究,分析异热和动力学.
- 密度功能理论 (DFT) 的计算,以了解染料-吸收剂相互作用.
主要成果:
- 合成的MNP表现出超偏磁性行为,易于磁性分离,以及高和磁化.
- 聚合物涂层的MNP在<2分钟内实现了>99%的染料去除,具有高吸附能力 (85-110毫克g-1).
- 观察到选择性吸附:对阳离子CR的PEG-MNP,对阴离子MB的PAA/粉-MNP;吸附遵循Langmuir/Freundlich和伪二阶模型.
- 再生研究表明,在没有脱吸剂的情况下,在六个周期内,去除效率>65%.
结论:
- 设计的聚合物涂层MNP是高效,选择性和可重复使用的纳米吸收剂,用于从废水中去除有机染料.
- 吸附机制涉及静电和键相互作用,由DFT研究证实.
- 这些发现证明了定制磁纳米吸收剂在工业废水处理应用中的巨大潜力.
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