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通过可见光对的新型无催化剂激活,用于减少微污染物
Ge Zeng1, Linqian An1, Maoju Jiang1
1Institute of Carbon Peaking and Carbon Neutralization, Jiangmen Key Laboratory of Synthetic Chemistry and Cleaner Production, School of Environmental and Chemical Engineering, Wuyi University, Jiangmen 529020, Guangdong Province, China.
可见光激活有效降解微污染物,产生反应性物种 (RCS) 和基. 这种Vis-LED/工艺显示出没有催化剂的水处理有前途.
科学领域:
- 环境化学环境化学
- 光催化作用的光催化
- 水处理 处理水的方法
背景情况:
- 微污染物污染对水质构成重大威胁.
- 传统的水处理方法往往难以完全去除微污染物.
- 可见光光催化剂为先进的氧化过程提供了潜在的途径.
研究的目的:
- 使用可见发光二极管 (Vis-LED) 调查的直接激活.
- 评估Vis-LED/在降解微污染物的效率,特别是阿提诺洛尔 (ATL).
- 阐明降解途径并确定涉及的反应性物种.
主要方法:
- 使用不同波长 (448 nm和513 nm) 的Vis-LED辐射直接激活.
- 在不同的条件下 (pH,食尸动物的存在) 对阿提诺洛 (ATL) 进行的降解实验.
- 火实验和建模以识别反应性物种并确定它们对降解的贡献.
主要成果:
- 视-LED有效地激活了,实现了64.3-100%的ATL降解,速度常数高达0.195分钟-1.
- 反应性物种 (ClO•,Cl2•-,Cl•) 和基 (•OH) 被确定为ATL降解的关键因素.
- 随着波长和pH值的增加,降解效率下降,而离子的影响最小;酸和碳酸盐离子显示出抑制作用.
结论:
- 维斯-LED/系统是一种高效,无催化剂的微污染物降解工艺.
- 了解不同反应物种和影响因素的作用对于过程优化至关重要.
- 这项技术为先进的水处理应用提供了一个有希望的可持续解决方案.
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