ABSTRACT

Development of an efficient conversion technique of O₃ to active oxygen species (OS) with high oxidation potential under weakly acidic conditions is described herein. This technique involves the generation of HO₂^– as an initiator of the radical chain reaction by the addition of H₂O₂ or/and UV irradiation into aqueous solution during O₃ fine bubble injection. Minimizing the O₃ bubble diameter led to the enhanced production of OS because of the generation of HO₂^– with contact between O₃ and OH^– around the minute gas-liquid interfaces and the promoted reaction of O₃ with HO₂^– caused by the acceleration of O₃ dissolution in the O₃/H₂O₂ or O₃/UV systems. Additionally, the generation rate of OS (r_OS) in the O₃/H₂O₂/UV system was found to be greater than the summed value of r_OS in the O₃/H₂O₂ and O₃/UV systems because of the direct conversion from H₂O₂ to OH• under UV irradiation.

摘要

本文描述了在弱酸性条件下将O ₃有效转化为具有高氧化电位的活性氧物质 (OS) 的技术的开发。该技术涉及通过在 O ₃细泡注射过程中将 H ₂ O ₂或/和紫外线照射添加到水溶液中，产生 HO ₂ ^-作为自由基链反应的引发剂。最小化Ò ₃导致OS的因为HO的产生增强的生产气泡直径₂ ^-接触O之间进行₃和OH ^-围绕分钟气-液界面和澳促进反应₃使用 HO ₂ ^–由O ₃ /H ₂ O ₂或 O ₃ /UV 系统中的 O ₃溶解加速引起。此外，发现O ₃ /H ₂ O ₂ /UV 系统中OS ( r _OS )的生成率大于O ₃ /H ₂ O ₂和O ₃ /UV 系统中r _OS的总和值因为在紫外线照射下从 H ₂ O ₂直接转化为 OH•。