In the present study, the potentiality of hydrodynamic cavitation (HC) for the degradation of methyl orange from synthetic aqueous solutions is presented. Hydrodynamic cavitation was set up at laboratory scale using a Venturi tube. Solutions of methyl orange (MO) were subjected to cavitation in order to investigate the efficiency and the potential of this technique for azo dye degradation. Moreover, a HC/H₂O₂/TiO₂ hybrid system was tested with the aim to verify its potential positive impact on the decolourization process and define the best conditions, among those investigated, to remove azo dye from synthetic solutions. The results obtained in this study showed that the maximum efficiency was close to 30% using a Venturi tube at an operating pressure of 400 kPa. The presence of additives, such as titanium dioxide and hydrogen peroxide, increased the performance of the degradation process to slightly above 70%.

中文翻译：

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在实验室规模上通过水力空化研究操作条件对偶氮染料溶液脱色的影响

在本研究中，提出了从合成水溶液中降解甲基橙的水力空化（HC）的潜力。使用文丘里管在实验室规模上设置水力空化。为了研究此技术对偶氮染料降解的效率和潜力，对甲基橙（MO）溶液进行了空化处理。此外，HC / H ₂ O ₂ / TiO ₂对混合系统进行了测试，目的是验证其对脱色过程的潜在积极影响，并确定研究条件中从合成溶液中去除偶氮染料的最佳条件。这项研究获得的结果表明，使用文丘里管在400 kPa的工作压力下，最大效率接近30％。添加剂（例如二氧化钛和过氧化氢）的存在将降解过程的性能提高到略高于70％。