Ozonation (OZ) is an important advanced oxidation process to purify water and wastewater. Because of the lower solubility and instability of ozone (O₃), selective oxidation and dependence on pH value, the industrial applications of OZ have been hindered by the following disadvantages: incomplete removal of pollutants, lower mineralization efficiency and the formation of toxic by-products. Meanwhile, OZ seems to have higher processing costs than other technologies. To improve the treatment efficiency and O₃ utilization, several combined processes, such as H₂O₂/O₃, UV/O₃, and Cavitation/O₃, have been explored, while the combined method of ultrasonication (US) with OZ is a promising treatment technology with a complex physicochemical mechanism. In US alone, the sonolysis of water molecules can produce more powerful unselective oxidant hydroxyl radicals (^•OH), and directly cause the sonochemical pyrolysis of volatile pollutants. In US/OZ, US can promote the mass transfer of O₃, and also drive the chemical conversion of O₃ to enhance the formation of ^•OH. Various layouts of US/OZ devices and the interactive effects of US/OZ (synergism or antagonism) on the degradation of various organics are illustrated in this review. The main factors, including US frequency, pH value, and radical scavengers, significantly affect the mass transfer and decomposition of O₃, the formation of ^•OH and H₂O₂, the degradation rates of organics and the removal efficiencies of COD and TOC (mineralization). As a result, US can significantly increase the yield of ^•OH, thereby improving the degradation efficiency and mineralization of refractory organics. However, US also enhances the decomposition of ozone, thereby reducing the concentration of O₃ in water and impairing the efficiency of selective oxidation with O₃ molecules.

臭氧化（OZ）是重要的高级氧化工艺，用于净化水和废水。由于臭氧（O ₃）的溶解度和不稳定性，选择性氧化以及对pH值的依赖性较低，因此OZ的工业应用受到以下缺点的阻碍：污染物去除不完全，矿化效率降低以及由以下物质形成的有毒物质：产品。同时，OZ似乎比其他技术具有更高的处理成本。为了提高处理效率和O ₃利用率，采用了几种组合工艺，例如H ₂ O ₂ / O ₃，UV / O ₃和空化/ O ₃，已经探索了，而超声（O）与OZ的组合方法是一种具有复杂物理化学机制的有前途的治疗技术。仅在美国，水分子的声波分解会产生更强大的非选择性氧化剂羟基（^• OH），并直接导致挥发性污染物的声波化学热解。在US / OZ中，US可以促进O ₃的质量转移，还可以驱动O ₃的化学转化以增强^•的形成。哦。本文概述了US / OZ设备的各种布局以及US / OZ对各种有机物降解的相互作用（协同作用或拮抗作用）。美国频率，pH值和自由基清除剂等主要因素会显着影响O ₃的传质和分解，^• OH和H ₂ O ₂的形成，有机物的降解率以及COD和TOC的去除效率（矿化）。结果，US可以显着提高^• OH的收率，从而提高难降解有机物的降解效率和矿化度。但是，美国还增强了臭氧的分解，从而降低了O ₃的浓度在水中会损害O ₃分子选择性氧化的效率。