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基于高性能臭氧纳米泡的先进氧化工艺 (AOP) 在高污染物负载下降解有机污染物

Priya Koundle¹, Neelkanth Nirmalkar¹, Grzegorz Boczkaj²

¹Department of Chemical Engineering, Indian Institute of Technology Ropar, Rupnagar, 140001, India.

Journal of environmental management

|January 15, 2025

概括

臭氧纳米气泡显著增强废水中的有机污染物降解,与微气泡相比,反应速度增加了三倍. 这种先进的氧化过程提高了可持续废水处理的臭氧效率.

科学领域:

环境化学环境化学
化学工程是化学工程的重要组成部分.
水处理技术水处理技术

背景情况:

先进的氧化工艺 (AOP) 是有效的化学废水处理,特别是降解有机污染物,如染料.
臭氧化是一种常见的AOP,但其效率可能受到臭氧分布差,质量转移低和半衰期短的限制.
纳米气泡为提高废水处理中臭氧利用率和反应率提供了潜在的解决方案.

研究的目的:

研究臭氧纳米泡的应用,以提高有机污染物的降解在高污染负载下.
为了比较臭氧纳米泡和微泡的降解效率.
阐明增强降解背后的机制,并确定最佳处理条件.

主要方法:

使用的散装纳米泡与臭氧集成,用于有机污染物的降解.
在不同的pH值,臭氧度以及盐和表面活性剂的存在下检查了降解效率.
通过清理试验验证了活性氧物种 (ROSs) 的存在,并通过LC-MS识别了中间体.

主要成果:

与微气泡 (0.025 L mg-1min-1) 相比,臭氧纳米泡实现了反应速率常数的三倍增加 (0.177 L mg-1min-1).
增强的降解归因于更高的质量转移,增加臭氧溶解度,纳米泡表面反应和延长臭氧半衰期.
在特定条件下,在300秒内实现了有机污染物 (绿色,甲基蓝) 的总降解 (100%) (5 LPM臭氧,酸性pH,2 mM NaCl,0.3 CMC表面活性物).

结论:

臭氧纳米泡是一种新且高效的方法,可以提高废水中有机污染物的降解.
该研究确定了关键的ROS (基,超氧基离子,单片氧) 导致降解过程.
这种集成的纳米泡-AOP方法为废水处理提供了更高的效率和环境可持续性.

关键词:

工业废水工业废水工业废水持久性有机污染物持久性有机污染物过程强化过程强化.激进分子激进分子可持续的发展可持续的发展处理水处理水处理水处理

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