Study on the importance of the reductive degradation of GenX in its overall electrochemical degradation process on different cathode materials.

IF 5.4 2区医学 Q2 MATERIALS SCIENCE, BIOMATERIALS

ACS Biomaterials Science & Engineering Pub Date : 2024-01-15 Epub Date: 2023-11-08 DOI:10.1016/j.scitotenv.2023.168415

Kara Hughes, Marco Pineda, Sasha Omanovic, Viviane Yargeau

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引用次数: 0

Abstract

Per- and polyfluoro alkylated substances (PFAS) are well known for their recalcitrant nature caused by the abundance of CF bonds. It has been proven that electrochemical degradation is a potentially suitable technique for treating PFAS; however, most studies solely focus on electrochemical oxidation, with limited attention given to electrochemical reduction, and the relative contribution of the two towards the total PFAS degradation has not yet been elucidated. This manuscript reports an investigation on the contribution of electroreduction to the overall electrodegradation of a target PFAS, HFPO-DA (i.e. GenX), using a boron doped diamond (BDD) anode and different cathode materials (Cu, Ti, Au). The oxidation and reduction reactions were successfully decoupled from each other and studied simultaneously using an electrochemical H-cell with an agar membrane. It was determined that reduction plays a significant role in the overall degradation of GenX for each of the cathodes studied, with its contribution ranging from 52 % for the Ti cathode, to 66 % for Cu, and to 92 % for Au.

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研究还原降解GenX在不同阴极材料上的整体电化学降解过程中的重要性。

全氟和多氟烷基化物质（PFAS）因其由丰富的CF键引起的难降解性质而闻名。已经证明，电化学降解是一种潜在的处理PFAS的合适技术；然而，大多数研究仅关注电化学氧化，对电化学还原的关注有限，两者对PFAS总降解的相对贡献尚未阐明。本文报道了使用硼掺杂金刚石（BDD）阳极和不同阴极材料（Cu、Ti、Au）对电还原对目标PFAS HFPO-DA（即GenX）整体电降解的贡献的研究。氧化和还原反应成功地相互解耦，并使用带有琼脂膜的电化学H细胞同时进行研究。已经确定，对于所研究的每种阴极，还原在GenX的整体降解中起着重要作用，其贡献范围从52 % 对于Ti阴极，为66 % 对于Cu，至92 % Au。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Biomaterials Science & Engineering Materials Science-Biomaterials

CiteScore

10.30

自引率

3.40%

发文量

413

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