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重金属离子控制PFAS吸附在水生系统中的戈伊上

Aaifa Chaudhary^1,2,3, Muhammad Usman¹, Wei Cheng⁴

¹Ecole Nationale Supérieure de Chimie de Rennes, ISCR-UMR 6226, Université de Rennes, CNRS, F-35000 Rennes, France.

Environmental science & technology

|October 31, 2024

概括

像铜,和铁这样的金属酸显著影响了和多基物质 (PFAS) 的环境流动性. 这些相互作用对于理解复杂的水和土壤系统中的PFAS运输至关重要.

科学领域:

环境化学环境化学
地质化学地质化学
环境科学环境科学

背景情况:

和多醇基物质 (PFAS) 是广泛存在的污染物,通常与重金属一起发现.
由于其多样性和低度,了解复杂环境系统中的分子水平的PFAS流动性具有挑战性.

研究的目的:

为了研究金属 (Cu(II),Cd(II,Fe(II)) 对常见PFAS (PFOA,PFOS,PFDA,GenX) 吸附在石上的影响.
开发对多元组件环境系统中PFAS吸收的机制性见解.

主要方法:

在不同度的Cu (II),Cd (II) 和Fe (II) 的存在下,对四种PFAS在围上进行实验性吸附研究.
利用表面复合模型来预测PFAS吸附行为.
在氧和无氧条件下研究的效果.

主要成果:

PFAS吸附对PFAS类型,pH值和金属离子度都很敏感.
Cu (II) 和Cd (II) 通过三元复合促进了PFOS和PFDA的吸附,而PFOA和GenX的吸附略有降低.
在无毒条件下,Fe (II) 显著增加了所有测试PFAS的吸附,超过了Cu (II) 和Cd (II) 的效果.
自然有机物增加了PFAS的流动性,但金属可以增强PFAS的保留,抵消这种效应.

结论:

金属酸在规范PFAS运输和环境中的命运方面发挥着至关重要的作用.
表面复合模型在金属离子存在时有效预测PFAS与矿物表面的相互作用.
研究结果为预测PFAS在环境界面上的行为提供了关键数据,特别是氧-无氧区域.

关键词:

铁 (II) 是一个在PFAS中,有很多方法.吸附吸附是一种吸附.哥斯提人 (Goethite) 是一个哥斯提人金属是金属,金属是金属.表面复杂化建模的模型.

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