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Ozone nanobubble technology as a novel AOPs for pollutants degradation under high salinity conditions

污染物 降级(电信) 臭氧 盐度 传质 水溶液 环境化学 流出物 化学 传质系数 溶解度 水处理 环境科学 化学工程 环境工程 色谱法 工程类 有机化学 电信 生态学 计算机科学 生物
作者
Priya Koundle,Neelkanth Nirmalkar,Malwina Momotko,Grzegorz Boczkaj
出处
期刊:Water Research [Elsevier BV]
卷期号:263: 122148-122148 被引量:17
标识
DOI:10.1016/j.watres.2024.122148
摘要

Conventional water treatment systems frequently exhibit diminished efficiency at high salinity - a significant issue especially for real industrial effluents - mostly due to the creation of intricate structures between pollutants and salts. One of the primary obstacles associated with high salinity conditions is the generation of by-products that pose additional hurdles for treatment. In this work, we have investigated the novel advanced oxidation process a so-called ozone nanobubble technology for degradation of the pollutants at high salinity conditions. The mass transfer is often the rate-limiting step in gas-liquid process and the poor rate of mass transfer diminishes the overall efficacy. One of the primary disadvantages associated with ozone is its restricted solubility and instability when dissolved in an aqueous solution. These characteristics impose limitations on its potential applications and need the use of specialized systems to facilitate gas-liquid interaction. In this work, we have also suggested enhancing the ozonation process through the utilization of ozone nanobubbles. The findings of our experiment and subsequent analysis indicate that the presence of nanobubbles enhances the process of ozonation through three key mechanisms: (i) an increased mass transfer coefficient, (ii) a higher rate of reactive oxygen species (ROS) generation attributed to the charged interface, and (iii) the nanobubble interface serving as an active surface for chemical reactions. The predicted mass transfer coefficients were found to range from 3 to 3.5 min
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