孔隙结构调节和表面功能化促进了PFAS在多孔碳上的吸附:实验和理论研究
Bei Zhang1, Daiki Moriyama2, Thilini Maheshika Herath3
1Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, Zhejiang 314100, China.
Journal of hazardous materials
|October 11, 2025
概括
一种新型的多孔碳吸附剂有效地从水中去除和多基物质 (PFAS). 这种材料具有高容量,快速吸附和再生能力,为PFAS污染提供了有希望的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
背景情况:
- 孔状碳的孔状结构和表面化学是有效的和多基物质 (PFAS) 吸附的关键.
- 了解吸附机制是开发高效的PFAS去除技术的关键.
研究的目的:
- 合成和描述一种用于增强PFAS吸附的新型多孔碳材料.
- 研究PFAS在合成材料上的吸附机制.
主要方法:
- 集成的热水碳化和热解用于材料合成.
- 优化ZnCl2浸,热解温度和酸洗,以改善孔隙结构和表面功能.
- 批量吸附实验以评估PFAS去除能力,动力学和可再生性.
- 理论计算以阐明吸附机制.
主要成果:
- 合成的多孔碳 (Glu-Zn4-500) 具有高度发达的微孔结构,无序的石墨域和多样化的氧基.
- 实现了PFOA的最大吸附能力为476 mg/g,在动态可再生性方面表现优于商业活性炭.
- 长链和短链PFAS在环境相关度下被证明迅速吸附 (<1分钟),即使在含有天然有机物和Ca2+的复杂矩阵中也是如此.
- 理论计算证实了通过疏水性和极性相互作用的协同吸附.
结论:
- 开发的多孔碳吸附剂显示了 PFAS 从水中去除的高效率和可再生性.
- 阐明了涉及疏水性和极性相互作用的协同吸附机制.
- 本研究提出了针对复杂水环境中的PFAS的高性能吸附剂的可行设计策略.
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