铁盐添加对UV/电高级氧化过程的影响
Naoyuki Kishimoto1, Kenjiro Nakamura1,2
1Faculty of Advanced Science and Technology, Ryukoku University, Otsu, Japan.
Environmental technology
|November 13, 2023
概括
将铁盐添加到UV/电高级氧化过程中可以增强1,4-二氧化的降解,但只有当紫外线比生产过多时才会如此. 这优化了激进反应,以有效地去除污染物.
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
背景情况:
- 1,4-二氧化是一种持久性有机污染物,需要有效的去除策略.
- 先进的氧化过程 (AOPs) 对降解像1,4-二氧化这样的反性化合物显示出希望.
- 紫外线/电AOP为水处理提供了替代方案,但其效率可能会受到操作参数的影响.
研究的目的:
- 为了研究铁盐添加对UV/电高级氧化过程对1,4-二氧化降解的影响.
- 阐明观察到铁离子降解的增强或抑制背后的机制.
- 在本AOP中确定铁盐应用的最佳条件.
主要方法:
- 使用了UV/电先进的氧化系统,配备了电解和UV流细胞.
- 使用无臭氧的低压蒸汽灯进行紫外线照射 (0.60W在254nm).
- 改变电解电流 (0.100 A和0.500 A) 和铁盐度,以评估1,4-二氧化的降解.
主要成果:
- 铁盐的添加增强了在较低的电解电流 (0.100 A) 下的1,4-二氧化降解.
- 在较高的电解电流 (0.500 A) 观察到抑制作用,这是由于过度的自由清除基.
- 在0.100A时,过多的紫外线促进了Fe (III) 光还原和芬顿式反应,产生基基并提高了降解效率.
结论:
- 在UV/电AOP中添加铁盐是有益的,当UV辐射相对于电化学生成相对较高时.
- 该机制涉及在特定条件下通过光还原和芬顿型反应增强的基因生成.
- 优化紫外线能量和生产之间的平衡对于有效的铁基辅助AOP在去除1,4-二氧化方面至关重要.
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