Yi Chunhai, Lu Qianqian, Wang Yun, Wang Yixuan, Yang Bolun
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
Ultrason Sonochem. 2018 May;43:156-165. doi: 10.1016/j.ultsonch.2018.01.013. Epub 2018 Jan 11.
In this paper, the decomposition of Rhodamine B (RhB) by hydrodynamic cavitation (HC), acoustic cavitation (AC) and the combination of these individual methods (HAC) have been investigated. The degradation of 20 L RhB aqueous solution was carried out in a self-designed HAC reactor, where hydrodynamic cavitation and acoustic cavitation could take place in the same space simultaneously. The effects of initial concentration, inlet pressure, solution temperature and ultrasonic power were studied and discussed. Obvious synergies were found in the HAC process. The combined method achieved the best conversion, and the synergistic effect in HAC was even up to 119% with the ultrasonic power of 220 W in a treatment time of 30 min. The time-independent synergistic factor based on rate constant was introduced and the maximum value reached 40% in the HAC system. Besides, the hybrid HAC method showed great superiority in energy efficiency at lower ultrasonic power (88-176 W). Therefore, HAC technology can be visualized as a promising method for wastewater treatment with good scale-up possibilities.
本文研究了通过水力空化（HC）、声空化（AC）以及这两种方法的组合（HAC）来分解罗丹明B（RhB）。在自行设计的HAC反应器中对20 L罗丹明B水溶液进行降解，在该反应器中水力空化和声空化可在同一空间同时发生。研究并讨论了初始浓度、入口压力、溶液温度和超声功率的影响。在HAC过程中发现了明显的协同作用。该组合方法实现了最佳转化率，在30分钟的处理时间内，当超声功率为220 W时，HAC中的协同效应甚至高达119%。引入了基于速率常数的与时间无关的协同因子，其在HAC系统中的最大值达到40%。此外，混合HAC方法在较低超声功率（88 - 176 W）下显示出在能源效率方面的巨大优势。因此，HAC技术可被视为一种具有良好放大潜力的、有前景的废水处理方法。
