Abstract
Organic pollution is a significant challenge in environmental protection, especially the discharge of refractory organic pollutants in chemical production and domestic use. The biological treatment method of traditional sewage treatment plants cannot degrade such pollutants, which leads to the continuous transfer of these pollutants into the water environment. Therefore, it is necessary to study clean and efficient advanced treatment technologies to degrade organic pollutants. The ozone/UV advanced oxidation process (O3/UV) has attracted extensive attention. This paper summarizes the reaction mechanism of O3/UV and analyzes its application progress in industrial wastewater, trace polluted organic matter and drinking water. The existing research results show that this technology has an excellent performance in the degradation of organic pollutants and has the characteristics of clean and environmental protection. In addition, the control of bromate formation and its economy is evaluated, and its operating characteristics and current application scope are summarized, which has a practical reference value for the follow-up in-depth study of the O3/UV process.
Highlights
The ozone/ultraviolet (O3 /UV) combined advanced oxidation process (AOPs) was first developed by American scientists in the 1970s to treat high-concentration mixed cyanide, and the amount of oxidized cyanide could quickly fall below the detection limit [1].Later, Fochtman and E.G. [2] used this process to treat trinitrotoluene (TNT) wastewater and found that the O3 /UV process can completely decompose TiO2 nanotubes (TNTs), and 85% of carbon was oxidized to release CO2
The results showed that the O3 /UV/ZnO
The removal rates of the above two pollutants in 30 min reached 80% and. It can be seen from the above that the O3 /UV process has a significant effect on the degradation of organic matter in drinking water, but the bromate problem is inevitable in all ozone processes
Summary
The ozone/ultraviolet (O3 /UV) combined advanced oxidation process (AOPs) was first developed by American scientists in the 1970s to treat high-concentration mixed cyanide, and the amount of oxidized cyanide could quickly fall below the detection limit [1]. The synergistic effect of ozone and ultraviolet radiation can realize the efficient and stable degradation of organic pollutants in complex water bodies, and the treatment capacity is greatly improved compared with the single ozone oxidation process [27]. The research showed that the O3 /UV process was an effective method for [30] or directly mineralized into CO2 and H2O to remove organic matter, the effect is significant. It was found that the concentration of WWROC used in the experiment was several times higher than usual, the O3 /UV process after adding H2 O2 produced a more robust oxidation, more ·OH was generated, making the reaction more active, and the TOrC removal rate was higher than 90%.
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