阳极-阴极协同过器在多个活跃地点激活过氧单硫酸盐,以实现高效和经济的水净化
Jiana Jing1,2,3, Huizhong Wu1,2,3, Xuechun Wang1,2,3
1Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Environmental science & technology
|June 2, 2025
概括
这项研究开发了一种高效的双电极系统,使用修改后的LaCoO3-Ti4O7阳极和纳米碳修改后的碳阴极来激活多氧硫酸盐 (PMS) 以快速处理废水,显著减少能源消耗并实现完全去除污染物.
科学领域:
- 环境科学 环境科学
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 开发高效的过氧硫酸盐 (PMS) 激活系统对于有效的废水处理至关重要,解决了像低容量,低矿化和高能耗等局限性.
- 现有的方法往往在不同水类型的效率和广泛适用性方面扎.
研究的目的:
- 设计和评估一种新的双电极系统,用于增强PMS激活.
- 通过修改的LaCoO3-Ti4O7阳极和纳米碳修改的碳阴极来研究PMS的联合激活机制.
- 评估系统在污染物清除,矿化和各种废水类型的能源消耗方面的效率.
主要方法:
- 制造一个氧气空隙介导的LaCoO3-修饰Ti4O7 (LCVTO) 阳极和在现场培养的纳米碳修饰碳 (C/CF) 阴极.
- 使用双电极系统激活PMS降解硫甲醇 (SMX).
- 使用现场电化学红外光谱学和密度函数理论 (DFT) 计算来阐明反应机制和活性位点.
主要成果:
- 在37.3秒内实现了100%的硫甲醇 (SMX) 清除,速度常数显著提高 (15.84分钟-1).
- 显示能耗大幅降低 (单个电极工艺的7.9%和4.6%) 和高污染物去除流量 (1061 L/m2·h).
- 确定了多个活性位点 (Co,Vo和纳米碳),有助于产生反应性氧物种 (ROS),如OH,SO4和1O2,而纳米碳增强了1O2的产生.
结论:
- 简单的CVTO/C-CF双电极系统有效地协同激活PMS,以实现快速高效的污染物降解.
- 该系统具有出色的pH适应性 (4-14),可重复使用性和连续运行能力,使其抵御废水矩阵干扰.
- 这种先进的氧化过程为处理各种工业和城市废水提供了有希望的,节能和经济的解决方案.
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