通过用dithioxamide功能化的聚合物吸附剂进行化,有效地从废水中去除银离子
Abdullah S Al-Bogami1, Abdullah Akhdhar1, Dina A Tolan2,3
1Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.
PloS one
|December 31, 2025
概括
一种新型的dithioxamide/glutaraldehyde树脂 (DTG-R) 有效地从废水中去除银离子 (Ag(I)). 这种吸附剂具有高容量,快速的化学吸附动力学和出色的可重复使用性,因此非常适合工业应用.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 工业废水往往含有有毒的重金属离子,如银 (Ag(I)).
- 有效和可重复使用的吸附剂对于去除Ag (I) 和修复受污染的水源至关重要.
- 开发具有高容量和选择性的吸附剂需要了解分子层面的吸附机制.
研究的目的:
- 为了研究Ag的吸附在dithioxamide/glutaraldehyde树脂 (DTG-R) 上.
- 描述树脂的结构和Ag (I) 结合的活性位点.
- 用实验和理论 (DFT) 方法阐明吸附机制,以优化废水处理.
主要方法:
- 滴氧胺/甲树脂 (DTG-R) 的合成和表征.
- 批量吸附实验以确定容量,动力学和热力学.
- 密度函数理论 (DFT) 和自然键轨道 (NBO) 分析以建模Ag (I) 结合相互作用.
主要成果:
- 在25°C时,DTG-R对Ag (I) 的Langmuir吸附能力高达27.2 mmol/g.
- 吸附遵循伪二阶动力学,表明化学吸附,并且是内热和自发的.
- DFT的计算显示,优选的Ag(I) 与硫位点结合,形成稳定的单核复合体.
结论:
- DTG-R在去除Ag(I) 方面表现出色,包括高容量,快速动力学和良好的可重复使用性 (96%在五个周期内).
- 该研究成功将宏观吸附行为与量子化学机制联系起来,证实硫是主要的结合点.
- DTG-R为工业废水中的Ag (I) 整治提供了一个有希望的,具有成本效益的解决方案.
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