Electrochemical degradation of perfluoroalkyl acids by titanium suboxide anodes,Environmental Science: Water Research & Technology

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Electrochemical degradation of perfluoroalkyl acids by titanium suboxide anodes
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2019-11-18 , DOI: 10.1039/c9ew00759h
Yaye Wang _{1,

2,

3,

4,

5} , Randall “David” Pierce _{1,

2,

3,

4,

5} , Huanhuan Shi _{1,

2,

3,

4,

5} , Chenguang Li _{1,

2,

3,

4,

5} , Qingguo Huang _{1,

2,

3,

4,

5}

Affiliation

Our recent findings indicate effective electrochemical degradation of perfluoroalkyl acids (PFAAs) in aqueous solutions using novel titanium suboxide (TSO) anodes. This provides a potentially promising technology to treat per- and polyfluoroalkyl substances (PFASs) in legacy AFFF stockpiles or in wastewater and contaminated groundwater. The degradation of PFAAs in TSO-based electrooxidation was evaluated with solutions of different compositions containing eight PFAAs either individually or in a mixture and under a range of operation conditions. Surface area normalized pseudo-first order rate constants were obtained and interpreted in terms of PFAA degradation behaviors and mechanisms. The PFAA degradation rates were further correlated to the molecular and electronic descriptors of the chemicals calculated based on density functional theory. The results of this study further the understanding of PFAS degradation in TSO-based anodic oxidation and provide a basis for process optimization, design and scaling.

中文翻译：

氧化钛阳极对全氟烷基酸的电化学降解

我们最近的发现表明，使用新型的次氧化钛（TSO）阳极可有效地降解水溶液中的全氟烷基酸（PFAA）。这提供了一种潜在的有前途的技术来处理传统AFFF库存或废水和受污染的地下水中的全氟和多氟烷基物质（PFAS）。使用包含八种PFAA的不同组成的溶液，分别或在混合物中，在一定的操作条件下，评估TSO基电氧化过程中PFAA的降解。获得了表面积归一化的伪一级速率常数，并根据PFAA降解行为和机理进行了解释。PFAA降解速率进一步与基于密度泛函理论计算的化学物质的分子和电子描述子相关。

更新日期：2019-11-18

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