局部酸性微环境 通过交替电流电扇工艺进行建设,以在中性条件下进行绿色高效的水净化
Yanbo Li1, Guohang Fu1, Chao Miao1
1School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
Environmental science & technology
|July 31, 2025
概括
新型交流电-芬顿 (ACE-Fenton) 工艺有效地在中性pH下去除污染物,克服了直流方法的局限性. 这种绿色净水技术增强了铁循环和基生成,以提高效率.
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:
- 直流电-芬顿 (DCE-Fenton) 工艺面临的挑战包括有限的铁物种循环,低效的过氧化利用率和严格的酸性pH需求.
- 这些局限性阻碍了DCE-Fenton在水中有效降解污染物的广泛应用.
研究的目的:
- 引入和评估一种异质的交流电-芬顿 (ACE-Fenton) 工艺,以在中性pH条件下有效去除污染物.
- 与传统的DCE-Fenton方法相比,提高铁物种循环和基 (•OH) 生产效率.
主要方法:
- 开发和应用一个在中性pH (pH0=7) 条件下运行的异质ACE-Fenton系统.
- 使用现场X射线吸收细结构光谱学和拉曼光谱学分析催化剂协调环境和价值状态.
- 通过现场电子磁共振光谱学研究OH生成机制,并使用开放电路潜在衰变瞬态来监测局部pH值.
主要成果:
- 对于各种污染物,ACE-Fenton过程显示出明显高于DCE-Fenton的伪第一阶动力学常数 (5.16.3倍大).
- 在中性条件下减少了大约20%的污染物清除时间.
- 由于局部的酸性微环境,证实了增强的Fe物种循环和高效的OH生成.
结论:
- ACE-Fenton工艺为净化水提供了一种高效,绿色的替代方案,在中性pH下有效运行.
- 这项研究为ACE-Fenton技术提供了理论基础,推动了可持续水处理解决方案的设计.
- 这些发现突出了ACE-Fenton在改善污染物清除和废水处理中过氧化利用方面的潜力.
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