Relashionship between trichloramine formation potential by chlorination and water quality parameters
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- NAKAMURA Reina
- Yokohama Waterworks Bureau Area on Water Management, Dept. of Environmental Health, National Institute of Public Health
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- KOBASHIGAWA Naoya
- Area on Water Management, Dept. of Environmental Health, National Institute of Public Health Water Supply Division, Health Service Bureau, Ministry of Health, Labour and Welfare
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- KOSAKA Koji
- Area on Water Management, Dept. of Environmental Health, National Institute of Public Health
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- HISAMOTO Yuji
- Graduate School of Engineering, Kyoto University
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- ECHIGO Shinya
- Graduate School of Global Environmental Studies, Kyoto University
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- ASAMI Mari
- Area on Water Management, Dept. of Environmental Health, National Institute of Public Health
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- AKIBA Michihiro
- National Institute of Public Health
Bibliographic Information
- Other Title
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- 塩素処理によるトリクロラミン生成能と一般水質項目との関係
- エンソ ショリ ニ ヨル トリクロラミン セイセイノウ ト イッパン スイシツ コウモク ト ノ カンケイ
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Abstract
Formation potentials of trichloramine (NCl3), one of the major chlorinous odor compounds, in 15 raw waters were evaluated. Effects of co-existing compounds on NCl3 formation by chlorination were also examined. NCl3 formation potentials in 15 raw waters were 6-140 μg Cl2/L. The NCl3 formation potentials were correlated with ammonia concentration in raw water. NCl3 formation potentials in ammonium solution were higher than those in raw waters when ammonia concentrations in the sample solutions were same. NCl3 formation potentials of ammonium and glycine solutions decreased in the presence of natural organic matter (NOM). Thus, it was found that NOM reduced NCl3 formation in chlorination. Among 5 NOMs used, the effects of the Pony Lake fulvic acid (PLFA) on NCl3 formation was smaller than those of other 4 NOMs. This was because PLFA had the portions of the NCl3 precursors by chlorination. NCl3 formation potentials of ammonium and glycine solutions decreased in the presence of bromide ion. However, for ammonium solution, the effects of bromide ion was not observed when NOM was also co-exsited. In case of glycine solution, the effects of 20 and 50 μg/L of bromide ion was not observed, but those of 200 μg/L of bromide ion was observed when NOM was also co-exsited. The effects of bromide ion was not observed when bromide ion was added to raw waters.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 68 (7), III_641-III_650, 2012
Japan Society of Civil Engineers
