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Updated: Jun 29, 2025

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Published on: April 18, 2019

从水中有效地去除per/polyfluoroalkyl物质,使用可回收的桑涂层共价有机框架:实验和理论方法

Xue Zhang¹, Shiyi Wang¹, Xingyi Zhu²

¹School of Environment, Tsinghua University, Beijing, 100084, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xi'ning, Qinghai Province, 810016, China.

|April 8, 2024

概括

一种新的复合凝,COF@CS,有效地从水中去除基和多基物质 (PFAS). 这种可回收材料具有很高的吸附能力和稳定的可重复使用性,为环境修复提供了一个有希望的解决方案.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
纳米技术纳米技术

背景情况:

和多基基物质 (PFAS) 是持久性环境污染物.
联有机框架 (COF) 对PFAS吸附有前途,但面临回收挑战.
粉状COF很难在水处理应用中重复使用.

研究的目的:

开发一种可回收的吸附剂,用于PFAS的去除.
合成一个四级胺COF-基托 (COF@CS) 复合凝.
为了评估COF@CS对 perfluorooctanoic acid (PFOA) 和其他PFAS的吸附性能和可重复使用性.

主要方法:

一个带正电荷的四分位胺COF的合成.
通过溶解-蒸发来制造COF@CS复合凝.
使用PFOA和其他十种PFAS的吸附实验.
使用乙醇和NaCl溶液进行再生研究.
使用XPS,FTIR和理论计算进行表征.

主要成果:

在COF@CS中,PFOA吸附能力 (2.8 mmol g−1) 和吸附率 (6.2 mmol g−1 h−1) 显著高于原始COF和奇托.
复合材料对其他十种PFAS显示出优异的去除效果.
COF@CS成功再生,并在五个周期内证明了稳定的可重复使用性.
在COF中的四次氨基群和CS中的质子氨基群被确定为关键的吸附部位.

结论:

与单个组件相比,COF@CS复合凝提供了增强的PFAS吸附和可回收性.
该材料显示了在水性PFAS清除和环境修复中实际应用的巨大潜力.
负电荷的COF和质子化CS之间的静电相互作用在PFOA吸附中起着至关重要的作用.

关键词:

吸附方式吸附方式吸附方式基托桑是一种酸盐.共价有机框架是共价有机框架.DFT计算的计算方法通过/多醇基物质的物质.

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