School of Civil, Environmental, and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
School of Civil, Environmental, and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
Ultrason Sonochem. 2021 Apr;72:105412. doi: 10.1016/j.ultsonch.2020.105412. Epub 2020 Dec 8.
This study investigated the degradation of ibuprofen (IBP), an activated persulfate (PS), when subjected to ultrasonic (US) irradiation and mechanical mixing (M). The effects of several critical factors were evaluated, including the effect of rpm on M, PS concentration, and initial pH, and that of temperature on IBP degradation kinetics and the PS activation mechanism. The resulting IBP oxidation rate constant was significantly higher at 400 rpm. As the PS load increased, the IBP oxidation rate constant increased. The value of the IBP reaction rate increased with decreasing pH; below pH 4.9, there was no significant difference in the IBP oxidation rate constant. The IBP oxidation activation energy when using the US/M-PS system was 18.84 kJ mol. In the US/M-PS system, PS activation was the primary effect of temperature at the interface during the explosion of cavitation bubbles. These encouraging results suggest that the US-PS/M process is a promising strategy for the treatment of IBP-based water pollutants.
本研究考察了布洛芬（IBP）在超声（US）辐射和机械混合（M）作用下的降解情况。评估了几个关键因素的影响，包括 rpm 对 M 的影响、PS 浓度和初始 pH，以及温度对 IBP 降解动力学和 PS 活化机制的影响。在 400 rpm 时，IBP 的氧化速率常数明显更高。随着 PS 负载的增加，IBP 的氧化速率常数增加。IBP 反应速率随 pH 值的降低而增加；在 pH 值低于 4.9 时，IBP 氧化速率常数没有显著差异。当使用 US/M-PS 系统时，IBP 氧化的活化能为 18.84 kJ/mol。在 US/M-PS 系统中，PS 活化是在空化泡爆炸过程中界面处温度的主要影响因素。这些令人鼓舞的结果表明，US-PS/M 工艺是处理基于 IBP 的水污染物的一种有前途的策略。
