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使用未经修改的石墨电极进行PFOA的电化学降解:用于PFAS整治的可扩展方法

Kochuparambil Ajayaghosh Akhilghosh¹, Salman Farissi¹, Vijayalekshmi Padmachandran Aiswriya¹

¹Department of Environmental Science, School of Earth Science Systems, Central University of Kerala, Kasaragod, Kerala, 671325, India.

Environmental science and pollution research international

|November 19, 2025

概括

使用负担得起的石墨电极进行电化学氧化,可以有效降解永久性环境污染物 perfluorooctanoic acid (PFOA). 这种方法实现了显著的PFOA去除和矿化,为水处理提供了具有成本效益的解决方案.

科学领域:

环境化学环境化学
水处理技术水处理技术
电化学电化学电化学

背景情况:

perfluorooctanoic 酸 (PFOA) 是一种在水生环境中发现的持久性有机污染物.
包括PFOA在内的PFAS化合物存在重大环境和健康风险.
迫切需要有效和经济的PFOA整治策略.

研究的目的:

为了研究电化学氧化 (EO) 的有效性,使用具有成本效益的石墨电极进行PFOA降解.
为了优化EO参数,最大限度地去除PFOA和矿化.
为了比较石墨电极的性能与传统的,更昂贵的替代品.

主要方法:

在水溶液中电化学氧化PFOA,使用石墨电极和硫酸作为支电解质.
优化操作参数,包括pH值,电流密度,电解质度和处理时间.
使用高分辨率质谱和离子染色学分析PFOA降解,总有机碳 (TOC) 去除和脱.

主要成果:

在pH3,45 mA/cm2,20 mM电解质和4小时处理时间下达到最佳降解效率.
85%的TOC去除和84.19%的PFOA降解由HRMS证实.
观察到显著的脱化,化物度大幅增加,表明矿物化.

结论:

石墨电极为PFOA降解和矿化提供了具有成本效益和高效的方法.
电化学氧化过程遵循一个脱碳化-氧化-消除-水解 (DHEH) 机制.
石墨电极为PFOA修复提供了一个可行的替代品,而不是昂贵的添加剂钻石电极.

关键词:

降解途径的降解途径电化学氧化电化学氧化石墨电极是一个石墨电极.人力资源管理系统HRMS 离子染色学离子染色学这就是PFOA的PFOA.

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