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Solar-induced generation of singlet oxygen and hydroxyl radical in sewage wastewaters
Tai, Chao; Zhang, Shaodong; Wang, Jing; Yin, Yongguang; Shi, Jianbo; Wu, Haoxian; Mao, Yuxiang
2017-05-01
Source PublicationENVIRONMENTAL CHEMISTRY LETTERS
Volume15Issue:3Pages:515-523
AbstractSinglet oxygen (O-1(2)) and hydroxyl radical (center dot OH) play an important role in the degradation of pollutants in surface waters. However, the mechanism underlying the photochemical generation of O-1(2) and center dot OH in wastewaters is poorly known. Here we studied the photo-induced generation of O-1(2) and center dot OH in different sewage treatment plant units. The correlation between the generation of O-1(2) and center dot OH and the water constituents was discussed. Our results show that in sewage units the O-1(2) formation rate ranges from 2.19 x 10(-8) to 6.74 x 10(-8) mol L-1 s(-1), and the center dot OH formation rate ranges from 1.7 x 10(-11) to 3.06 x 10(-10) mol L-1 s(-1). The average O-1(2) formation rates in the various sewage units are similar to those in wetland and estuarine waters containing rich dissolved organic matter and 2-4 times higher than those in lake and seawater samples. The average center dot OH formation rates of the sewage units are 5-50 times higher than for other water samples reported. The center dot OH generation rate increased with the iron content with a correlation coefficient of 0.85, which indicates that the photo-Fenton reaction plays a dominant role in center dot OH generation in sewage wastewater.
Department环境化学与生态毒理学国家重点实验室
KeywordSinglet Oxygen Hydroxyl Radical Photochemistry Sewage Treatment Plant
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/39416
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Tai, Chao,Zhang, Shaodong,Wang, Jing,et al. Solar-induced generation of singlet oxygen and hydroxyl radical in sewage wastewaters[J]. ENVIRONMENTAL CHEMISTRY LETTERS,2017,15(3):515-523.
APA Tai, Chao.,Zhang, Shaodong.,Wang, Jing.,Yin, Yongguang.,Shi, Jianbo.,...&Mao, Yuxiang.(2017).Solar-induced generation of singlet oxygen and hydroxyl radical in sewage wastewaters.ENVIRONMENTAL CHEMISTRY LETTERS,15(3),515-523.
MLA Tai, Chao,et al."Solar-induced generation of singlet oxygen and hydroxyl radical in sewage wastewaters".ENVIRONMENTAL CHEMISTRY LETTERS 15.3(2017):515-523.
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