globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.09.045
Scopus ID: 2-s2.0-85054314534
Effect of UV irradiation on iodinated trihalomethane formation during post-chloramination
Author: Xia Y.; Lin Y.-L.; Xu B.; Hu C.-Y.; Gao Z.-C.; Tang Y.-L.; Chu W.-H.; Cao T.-C.; Gao N.-Y.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2018
Volume: 147
pages begin: 101
pages end: 111
Language: 英语
Keyword: Chloramination ; Dissolved organic matter (DOM) ; Fluorescence spectroscopy ; Iodinated trihalomethanes (I-THMs) ; Iodine utilization factor (IUF) ; Ultraviolet (UV) irradiation
English Abstract: Ultraviolet (UV) irradiation has been widely used in drinking water treatment processes, but its influence on the formation of disinfection by-products (DBPs), especially the emerging iodinated trihalomethanes (I-THMs) during post-chloramination remains unclear. This study evaluated the impact of low pressure (LP) UV treatment on the formation of I-THMs during post-chloramination through two pathways. The first pathway is through the transition of DOM structure and composition during UV-chloramination, resulting significant increase of I-THM formation with increasing UV dosage in different dissolved organic matter (DOM)-containing water (49.7%–90.5% at 1160 mJ/cm2). With the application of excitation emission matrix-parallel factor analysis (EEM-PARAFAC), we found that I-THM formation in UV-chloraminated water correlated well with two ratios of three PARAFAC humic-like components (C3/C2 and C1/C2, R2 = 0.958–1.000), suggesting that the ratios of fluorescent components can be used as reliable indicators for I-THM formation. Moreover, the shift in these fluorescent components is crucial for I-THM formation during UV-chloramination. Another pathway for UV irradiation to affect I-THM formation during post-chloramination is through the transformation of iodine species. Large amounts of reactive iodine species (HOI/I2 and I3 −) can be generated directly in the mixed iodine system by UV light, leading to the enhancement of iodine utilization factor (IUF) (up to 0.040) after post-chloramination. These results suggest that UV application to DOM-containing water may induce changes in organic precursors and iodine species so as to enhance I-THM formation during post-chloramination. © 2018 Elsevier Ltd
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Document Type: 期刊论文
Appears in Collections:气候减缓与适应

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Affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 824, Taiwan; College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China; School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China

Recommended Citation:
Xia Y.,Lin Y.-L.,Xu B.,et al. Effect of UV irradiation on iodinated trihalomethane formation during post-chloramination[J]. Water Research,2018-01-01,147
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