新出现的污染物的氧化通过S(IV) 活性酸盐:反应性物种的识别
Yingying Chu1, Mujian Xu1, Xiaoyang Li1
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
Water research
|January 10, 2024
概括
铁VI) / SIV) 工艺有效降解新出现的污染物,pH值显著影响反应性物种的产生. 最佳的氧化发生在接近中性的pH值,突出pH值.
科学领域:
- 环境化学环境化学
- 水处理技术 水处理技术
- 先进的氧化过程 先进的氧化过程
背景情况:
- 现有的Fe (VI) /S (IV) 工艺研究主要针对性条件对新出现的污染物 (EC) 降解.
- 不同的pH值对Fe (VI) /S (IV) 工艺性能和机制的影响仍未得到充分研究.
研究的目的:
- 研究Fe(VI) /S(IV) 工艺在不同pH条件下降解硫甲醇 (SMX) 和布洛 (IBU) 的效率和机制.
- 识别关键的反应性物种及其在pH范围内的污染物降解中的作用.
主要方法:
- 使用硫甲醇 (SMX) 和易布洛芬 (IBU) 作为模型新出现的污染物.
- 在一系列的pH值中研究了Fe(VI) / S(IV) 过程.
- 采用竞争性火实验来阐明不同反应物种的贡献.
主要成果:
- pH极为关键地决定了反应性物种的产生,Fe ((V/IV) 和硫酸盐基 (SO4•-) 已被确定.
- 较高的pH值有利于SO4的形成,而较低的pH值增强了Fe (VI) 到Fe (V/IV) 的转化.
- 由于丰富的Fe (V/IV) 和SO,近中性pH显示出最佳的氧化 (在5分钟内清除74%以上) - - 基因的贡献随着pH增加而增加.
结论:
- pH 是控制Fe (VI) /S (IV) 工艺效率和机制的关键因素.
- 了解pH取决于反应性物种的动态对于优化硫酸盐激活的Fe (VI) 氧化在水处理中至关重要.
- Fe ((V/IV) 和基因对SMX和IBU降解的相对贡献因pH而异,SMX的演变速度较慢.
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