DOI: 10.1016/j.watres.2018.09.058
Scopus记录号: 2-s2.0-85054460883
论文题名: Formation of iodinated trihalomethanes and haloacetic acids from aromatic iodinated disinfection byproducts during chloramination
作者: Hu S. ; Gong T. ; Xian Q. ; Wang J. ; Ma J. ; Li Z. ; Yin J. ; Zhang B. ; Xu B.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 147 起始页码: 254
结束页码: 263
语种: 英语
英文关键词: Aromatic iodinated DBPs
; Chloramination
; DBPs
; Iodinated DBPs
; Iodinated HAAs
; Iodinated THMs
英文摘要: Iodinated disinfection byproducts (DBPs) are widely present in disinfected drinking waters and wastewater effluents, and they have drawn increasing concern owing to their high toxicity. To date, the reported iodinated DBPs mainly include aliphatic and aromatic ones, and iodinated trihalomethanes (THMs) and haloacetic acids (HAAs) are the most commonly detected aliphatic iodinated DBPs in disinfected waters. In this study, the formation of iodinated THMs and HAAs from aromatic iodinated DBPs during chloramination was investigated. The decomposition kinetics of the aromatic iodinated DBPs and the formation of iodinated THMs and HAAs were studied, the formation pathways of iodinated THMs and HAAs from the aromatic iodinated DBPs were explored, the factors affecting the formation were examined, and the toxicity change was evaluated. The results revealed that four aromatic iodinated DBPs (2,4,6-triiodophenol, 3,5-diiodo-4-hydroxybenzaldehyde, 3,5-diiodosalicylic acid, and 2,6-diiodo-4-nitrophenol) all underwent transformation to form triiodomethane (TIM), monoiodoacetic acid (MIAA), and diiodoacetic acid (DIAA) during chloramination. The decomposition of the aromatic iodinated DBPs all followed a pseudo-first-order decay during chloramination, and the rank order of the decomposition rate constants was as follows: 2,4,6-triiodophenol > 3,5-diiodo-4-hydroxybenzaldehyde ≥ 3,5-diiodosalicylic acid > 2,6-diiodo-4-nitrophenol. Several polar iodinated intermediates were detected and identified (e.g., 2,6-diiodo-1,4-benzoquinone and iodobutenedioic acid) during chloramination of 2,4,6-triiodophenol, based on which the formation pathways of TIM, MIAA, and DIAA from 2,4,6-triiodophenol during chloramination were proposed and further validated. The results also revealed that monochloramine dose, pH, temperature, and short free chlorine contact time all affected the formation of TIM, MIAA, and DIAA from 2,4,6-triiodophenol during chloramination. The cytotoxicity order of the eight iodinated DBPs was MIAA > 2,6-diiodo-4-nitrophenol > 2,4,6-triiodophenol > 2,6-diiodo-1,4-benzoquinone > DIAA ≥ 3,5-diiodosalicylic acid >3,5-diiodo-4-hydroxybenzaldehyde > TIM. The toxicity of the chloraminated 2,4,6-triiiodophenol sample first decreased and then increased over time due to the transformation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112351
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; School of Chemistry and Materials Science, Ludong University, Yantai, 264025, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
Recommended Citation:
Hu S.,Gong T.,Xian Q.,et al. Formation of iodinated trihalomethanes and haloacetic acids from aromatic iodinated disinfection byproducts during chloramination[J]. Water Research,2018-01-01,147