可再生石墨烯纳米板块吸附剂,用于快速和微量地从水中去除PFAS
Md Nahid Pervez1, Tao Jiang1, Aswin Kumar Ilango1
1Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, Albany, New York 12222, United States.
ACS omega
|January 26, 2026
概括
一种新型的石墨烯纳米板块 (GNP) 材料与化 (CTAC) 改性,有效地从水中快速有效地去除几乎所有目标和多基物质 (PFAS). 这种吸附剂在各种水条件下显示稳定性,并且可以再生再利用.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 和多醇基物质 (PFAS) 是持久的环境污染物,需要有效的清除策略.
- 吸附是从污染水源中消除PFAS的一个关键技术.
研究的目的:
- 开发和评估一种新型的石墨烯纳米板块 (GNP) 材料,用于 PFAS 吸附,该材料已用 cetyltrimethylammonium 化物 (CTAC) 改性.
- 为了研究吸附动力学,异热模型和GNP-CTAC的PFAS去除的潜在机制.
- 评估GNP-CTAC在各种水质条件下的性能和稳定性及其可再生性.
主要方法:
- 综合CTAC修改的GNP (GNP-CTAC) 的方法.
- 使用10个目标PFAS在Milli-Q水和河水中的吸附实验.
- 动力和同热模型 (伪二次和Sips模型).
- 物理化学表征以验证吸附机制.
- 在不同的pH值,离子强度和自然有机物度下进行性能评估.
- 再生和可重复使用性测试.
- 第三方的性能验证.
主要成果:
- 在Milli-Q水中,GNP-CTAC在10μg/L下实现了近100%的10个目标PFAS的去除.
- 吸附动力学遵循伪二阶模型,具有快速去除 (<1分钟).
- Sips异热模型表明异质的表面位点和由静电和疏水相互作用驱动的多层吸附.
- 在各种pH值,离子强度和天然有机物水平上,GNP-CTAC表现出高稳定性和有效性.
- 在200 ng/L的河水中实现了近100%的PFAS去除,表现优于活性炭.
- 该材料至少可再生四个周期,性能损失最小,表面活性剂不漏.
结论:
- 经CTAC修改的GNP是一种高效的吸附剂,可以从各种水基质中快速和几乎完全去除PFAS.
- 吸附机制涉及对异质表面的静电吸引和疏水相互作用的组合.
- GNP-CTAC为PFAS整治提供了一个稳定,可再生和有效的解决方案,经过第三方测试验证.
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