工程电极极性用于增强使用颗粒活性碳在现场生成基基
Stephanie Sarrouf1, Amir Taqieddin2, Muhammad Fahad Ehsan1
1Department of Civil & Environmental Engineering, Northeastern University, Boston, MA 02115, USA.
概括
电极极性逆转修改颗粒活性炭 (GAC) 阴极,促进基 (•OH) 产生,以改善水处理. 这种优化的GAC有效地去除了草甘等农药.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 颗粒活性炭 (GAC) 是有效的在现场反应性氧物种 (ROS) 产生.
- 电化学方法对于水处理中的先进氧化过程至关重要.
研究的目的:
- 通过使用电化学修饰的GAC,通过2电子氧降解反应 (2e-ORR) 增强H2O2分解.
- 为了优化电极极性逆转 (PR) 参数,以增加基 (•OH) 的产生.
- 为了评估修改后的GAC对草甘去除的有效性.
主要方法:
- 使用电极极性逆转 (PR) 来电化学修改GAC.
- 优化PR参数:频率,电流强度和时间间隔.
- 使用优化的参数量化OH度的量化.
- 使用修改和未修改的GAC.评估草甘去除效率.
主要成果:
- 优化的PR通过增加表面氧功能来增强GAC的水友性.
- 优化的电极极性逆转 (20 (没有PR) - 2 (PR) 间隔,140mA) 产生了38.9μM的OH度.
- 经过修改的GAC消除了67.6%的草甘,明显高于未经修改的GAC (40.6%).
结论:
- 通过PR对GAC进行电化学修饰是增强ROS合成的可行策略.
- 优化的GAC阴极显示了提高电化学水处理系统效率的巨大潜力.
- 这种方法为从水中更有效地去除持久有机污染物提供了一条途径.
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