This study focuses on the effects of ozonation on the optical and photochemical properties of dissolved organic matter (DOM). Upon ozonation, a decrease in light absorption properties of DOM was observed concomitantly with a large increase in singlet oxygen (¹O₂) and hydroxyl radical (˙OH) quantum yields (Φ_¹O2 and Φ_˙OH, respectively). The decrease in absorbance was linked to the reaction of DOM chromophores with ozone and ˙OH, formed as a secondary oxidant, while the increase in Φ_¹O2 and Φ_˙OH are linked to the formation of quinone-like moieties from the reaction of ozone with phenolic DOM moieties. Investigations using benzoic acid as a ˙OH probe and methanol as a ˙OH scavenger indicated that not only is ˙OH formed, but that other hydroxylating species (˙OH-like) are also produced upon DOM photo-irradiation.

中文翻译：

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溶解有机物臭氧化后的羟基自由基和单线态氧的光学性质和光化学产生

这项研究的重点是臭氧化对溶解有机物（DOM）的光学和光化学性质的影响。当臭氧化，在DOM的吸光特性的降低，用在单线态氧的大量增加（伴随观察到¹ Ò ₂（）和羟基自由基（OH）量子产率Φ _{¹ Ò 2}和Φ _OH，分别地）。吸光度的降低是有联系的用臭氧和OH DOM生色团，形成作为二次氧化剂的反应，而增加Φ _{¹ Ò 2}和Φ _OH臭氧与臭氧与酚类DOM部分的反应形成醌样部分有关。使用苯甲酸作为OH探针和使用甲醇作为OH清除剂进行的研究表明，不仅形成了OH，而且在DOM光辐照下还产生了其他羟基化物质（类似OH）。