Formation of iodo-trihalomethanes, iodo-acetic acids, and iodo-acetamides during chloramination of iodide-containing waters: Factors influencing formation and reaction pathways
文献类型：期刊论文
| 作者 | Liu, Shaogang; Li, Zhenlin; Dong, Huiyu; Goodman, Bernard A.; Qiang, Zhimin |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2017-01-05 |
| 卷号 | 321期号:0页码:28-36 |
| 关键词 | Iodinated Disinfection By-products (I-dbps) Monochloramine (Nh2cl) Natural Organic Matter (Nom) Influential Factors Pathways |
| 英文摘要 | This study investigated systematically the factors influencing the formation of iodinated disinfection by-products (I-DBPs) during chloramination of I--containing waters, including reaction time, NH2Cl dose, I- concentration, pH, natural organic matter (NOM) concentration, Br-/I- molar ratio, and water matrix. Among the I-DBPs detected, iodoform (CHI3), iodoacetic acid (IAA), diiodoacetic acid (DIAA), triiodoacetic acid (TIAA), and diiodoacetamide (DIAcAm) were the major species produced from reactions between reactive iodine species (HOI/I-2) and NOM. A kinetic model involving the reactions of NH2Cl auto-decomposition, iodine species transformation and NOM consumption was developed, which could well describe NH2Cl decay and HOI/I-2 evolution. Higher concentrations of CHI3, IAA, DIAA, TIAA, and DIAcAm were observed in chloramination than in chlorination, whereas IO3- was only formed significantly in chlorination. Maximum formation of I-DBPs occurred at pH 8.0, but acidic conditions favored the formation of iodinated haloacetic acids and DIAcAm. Increasing Br-/I- molar ratio from 1 to 10 did not increase the total amount of I-DBPs, but produced more bromine-substituting species. In addition, chloramination of 18 model compounds indicated that low-SUVA(254) (specific ultraviolet absorbance at 254 nm) NOM generally favored the formation of I-DBPs compared to high-SUVA(254) NOM. Finally, potential pathways for I-DBPs formation from chloramination of NOM were proposed. (C) 2016 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39701]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, Shaogang,Li, Zhenlin,Dong, Huiyu,et al. Formation of iodo-trihalomethanes, iodo-acetic acids, and iodo-acetamides during chloramination of iodide-containing waters: Factors influencing formation and reaction pathways[J]. JOURNAL OF HAZARDOUS MATERIALS,2017,321(0):28-36. |
| APA | Liu, Shaogang,Li, Zhenlin,Dong, Huiyu,Goodman, Bernard A.,&Qiang, Zhimin.(2017).Formation of iodo-trihalomethanes, iodo-acetic acids, and iodo-acetamides during chloramination of iodide-containing waters: Factors influencing formation and reaction pathways.JOURNAL OF HAZARDOUS MATERIALS,321(0),28-36. |
| MLA | Liu, Shaogang,et al."Formation of iodo-trihalomethanes, iodo-acetic acids, and iodo-acetamides during chloramination of iodide-containing waters: Factors influencing formation and reaction pathways".JOURNAL OF HAZARDOUS MATERIALS 321.0(2017):28-36. |
入库方式： OAI收割
来源：生态环境研究中心
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