皮科林酸促进了Fe (III) /周期性过程中的有机污染物去除:去除效率和污染物结构之间的机制和关系
Jiansen Lei1, Linjie Ding1, Yangju Li1
1School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China.
Water research
|October 22, 2024
概括
可生物降解的皮科林酸增强了铁/周期酸的过程,可以在广泛的pH范围内去除有机污染物. 这种方法有效地利用高价值铁氧物种和基激素进行高效的降解.
科学领域:
- 环境化学环境化学
- 先进的氧化过程 先进的氧化过程
- 催化剂是一种催化剂.
背景情况:
- 铁催化周期酸盐 (PI) 氧化过程在pH适用性和Fe (III) -氧化剂反应性方面面临限制.
- 开发有效的方法来扩大操作窗口和提高反应性对于实际应用至关重要.
研究的目的:
- 为了提高Fe (III) /PI工艺的性能,使用可生物降解的化联结物 (CLs) 去除有机污染物 (OPs).
- 研究Fe (III) -PICA/PI系统中的反应性物种,降解机制和结构-活性关系.
主要方法:
- 在Fe (III) /PI系统中利用皮科林酸 (PICA) 作为合联结体.
- 采用火实验,硫氧化物探针转换和18O同位素标记来识别反应性物种.
- 与OP电子特性相关的降解动力学 (HOMO能量,电离潜力,能量差距).
主要成果:
- 在广泛的pH范围 (3.0-8.0) 上,Fe(III) -PICA/PI过程有效地去除了OPs.
- 主导反应物种被确定为高价值铁氧 (FeIV=O) 和基 (•OH).
- OP降解效率与其电子结构,特别是能量差距 (ΔE) 有很强的相关性.
结论:
- 皮科林酸显著提高了Fe (III) /PI工艺效率和pH适用性.
- 铁III-PICA/PI系统在具有非有毒PI转换的真水矩阵中显示了长期的有效性.
- 这项研究提供了提高Fe (III) /PI过程的有效策略,并阐明了污染物降解机制.
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