The influence of the pH and the contaminant desorption/emulsification on ozone (O3), ozone-hydrogen peroxide (O3/H2O2) and ozone-photolysis (O3/UV) oxidation reactions were performed to treat crude petroleum (CP) contaminated soil and water samples. Oxidation efficiency is also related to both free radicals formation in reaction medium (which is dependent of the pH), and contaminant availability (which is dependent of the compounds solubilization or desorption processes). Thus, batch basic processes of O3/H2O2 or O3/UV were improved with sonication system and surfactant addition. In the case of O3/H2O2 process, the reactions were performed at adjusted (pH = 11) and natural pH (free pH= 4-5). The effectiveness of the improved advanced oxidation processes were evaluated through the time-course analysis of the chemical oxygen demand (COD), biochemical oxygen demand (BOD5), and total organic carbon (TOC) values. For both improved treatment processes, CP-contaminated water samples displayed higher values for TOC removal and BOD5/COD ratios than CP-contaminated soil samples. The O3/H2O2 process provided better results than the O3/UV process regarding degradation efficiency, but the former is associated with higher treatment costs due to H2O2 consumption. Overall, oxidation treatment processes increase their efficiencies when reactions are carried out associated with solubilization and desorption systems promoted by sonication/surfactant action.

中文翻译：

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解吸过程和pH值调节对O3，O3 / H2O2和O3 / UV处理原油污染的水和土壤样品的效率的影响。

pH值和污染物的解吸/乳化作用对臭氧（O3），臭氧-过氧化氢（O3 / H2O2）和臭氧-光解（O3 / UV）氧化反应的影响用于处理受石油（CP）污染的土壤和水样品。氧化效率还与反应介质中自由基的形成（取决于pH）和污染物的可获得性（取决于化合物的增溶或解吸过程）有关。因此，通过超声处理系统和添加表面活性剂可以改善O3 / H2O2或O3 / UV的批处理基本过程。在O3 / H2O2工艺的情况下，反应在调节的（pH = 11）和自然pH（游离的pH = 4-5）下进行。通过对化学需氧量（COD）进行时程分析，评估了改进的高级氧化工艺的有效性，生化需氧量（BOD5）和总有机碳（TOC）值。对于这两种改进的处理过程，受CP污染的水样品显示的TOC去除率和BOD5 / COD比值均高于受CP污染的土壤样品。就降解效率而言，O3 / H2O2工艺比O3 / UV工艺提供了更好的结果，但前者由于消耗H2O2而带来更高的处理成本。总体而言，当进行与超声/表面活性剂作用促进的增溶和解吸体系相关的反应时，氧化处理工艺会提高其效率。就降解效率而言，O3 / H2O2工艺比O3 / UV工艺提供了更好的结果，但前者由于消耗H2O2而带来更高的处理成本。总体而言，当进行与超声/表面活性剂作用促进的增溶和解吸体系相关的反应时，氧化处理工艺会提高其效率。就降解效率而言，O3 / H2O2工艺比O3 / UV工艺提供了更好的结果，但前者由于消耗H2O2而带来更高的处理成本。总体而言，当进行与超声/表面活性剂作用促进的增溶和解吸体系相关的反应时，氧化处理工艺会提高其效率。