###### Abstract
Combining ozone with UV radiation enhances the overall efficiency of organic matter degradation by simultaneously producing -OH radicals during ozone decomposition and generating hydrogen peroxide (H\({}_{2}\)O\({}_{2}\)) [8; 9; 10]. In environmental engineering, ultrasonic fields in the range of 20 to 100 kHz are commonly used for the removal of pollutants. This method involves emitting ultrasound into the aqueous phase, which induces the phenomenon of cavitation. According to [PERSON] et al. (2007) [11], the generation of hydroxyl radicals depends on several factors. [PERSON] (2015) [12] particularly highlights the influence of parameters such as pH; temperature; physicochemical properties of the substances removed; the duration, intensity, and frequency of the ultrasonic field; as well as the presence of inhibitory substances. His research indicates that pH does not significantly affect the number of hydroxyl radicals and hydrogen peroxide formed. However, the pH can influence the process when the organic substance exists in both molecular and ionic forms. Ionic substances exhibit lower hydrophobicity, which leads to their degradation occurring outside the cavitation bubble, where less favorable conditions prevail. For degradation to occur within the cavitation bubble, the substance must be in a molecular form in the solution. The use of ultrasonic fields to remove refractory pollutants is a promising method that is considered environmentally friendly due to its high efficiency, significant reduction in processing time, and low instrumental requirements. The process can be carried out using a special sonotrode or ultrasonic baths equipped with an ultrasonic transducer. [PERSON] and [PERSON] (2005) [13] applied ultrasound at 20 kHz and an intensity of 3.75 W/cm\({}^{2}\) to remove trihalomethanes from aqueous solutions. In their study, 100% efficiency was achieved for CHCl\({}_{3}\) (chloroform) removal after 180 min. In the study by [PERSON] et al. (2020) [14], the effectiveness of electrocoagulation, ultrasound, and ultrasound-assisted electrocoagulation processes for color removal from aqueous dye solutions was investigated. Removal of RR 241 and DB 60 dyes using a combination of ultrasound and electrocoagulation processes resulted in reduced processing time by increasing the efficiency of contaminant removal. In contrast, ultrasound-assisted electrocoagulation resulted in 99.9% color removal for RR 241 in only 4 min as well as complete color reduction from 100 mg/L of DB 60 dye solution. Among the available AOP methods, heterogeneous photocatalysis presents a promising alternative. It involves the use of a semiconductor catalyst (such as solid forms of TiO\({}_{2}\)) in conjunction with ultraviolet light irradiation. This technology not only generates hydroxyl radicals but also promotes the formation of positive holes on the catalyst surface, which possess a high oxidizing power of approximately 3.0 eV. This process also contributes to the degradation of pollutants [9; 15; 16]. Ozonation is one of the most effective advanced oxidation methods, not only for efficiently removing dyes but also other organic contaminants. This process has an additional advantage because ozone, acting as a strong oxidizer, can break down a range of difficult-to-remove substances, including pesticides, pharmaceuticals, and toxic metals. Due to the high reactivity of radicals such as \(\cdot\)OH, ozonation can lead to the complete mineralization of contaminants, transforming them into easily removable products such as carbon dioxide and water. However, the effectiveness of ozonation in removing pollutants depends on various factors, such as the pH of the water, ozone concentration, reaction time, and the presence of other components in the water that may affect the oxidation process [17]. In contrast to the Fenton process, which requires the use of iron salts and hydrogen peroxide, ozonation relies solely on ozone, reducing the risk of introducing additional chemicals into the environment.