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从水中分离 perfluorooctanoic 酸,使用中多孔和巨孔的 syndiotactic 聚乙烯凝

Pratik S Gotad¹, Calum Bochenek², Chrys Wesdemiotis^1,2

¹School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States.

Langmuir : the ACS journal of surfaces and colloids

|May 2, 2024

概括

一种新型的综合力学聚乙烯 (sPS) 湿凝有效地从水中去除酸 (PFOA). 这种吸附剂净化水以低于美国环保署限制,解决持续的环境污染.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
水处理处理水的方法

背景情况:

和多醇基物质 (PFAS) 是持久性,生物积累性和有毒的污染物.
在地下水和地表水中经常检测到 perfluorooctanoic 酸 (PFOA).
当前的水处理方法在有效地去除PFOA方面面临挑战.

研究的目的:

开发和评估一种用于从水中去除PFOA的新型吸附剂.
研究PFOA在特定材料上的吸附机制和动力学.
评估吸附剂在满足监管标准方面的效率.

主要方法:

使用了高表面积,中性和巨性综合性多聚烯 (sPS) 湿凝.
在环境相关的PFOA度 (≤1μg/L) 进行吸附实验.
分析了吸附异热量和动力学,检查了凝多孔度和毛孔大小的影响.

主要成果:

sPS湿凝成功地将PFOA除去到低于美国环保署2023年健康咨询限值 (4 ppt) 的度.
一个西格形吸附异体表示一个两步吸附机制,涉及表面亲和力和分子聚合.
吸附动力学受到sPS湿凝毛孔大小和毛孔体积的显著影响.

结论:

合成聚乙烯 (sPS) 湿凝是从污染水中去除PFOA的有希望的吸附剂.
材料的多孔结构对其吸附效率起着至关重要的作用.
这种吸附剂为实现有关PFOA污染的安全饮用水标准提供了可行的解决方案.

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