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発表 Survey on Total Organic Halogens (TOF, TOCl, TOBr) in the Lake Biwa - Yodo River Basin and Their Toxicity Evaluation by Algal Growth Inhibition Test

作成年度 2018 年度
論文名 Survey on Total Organic Halogens (TOF, TOCl, TOBr) in the Lake Biwa - Yodo River Basin and Their Toxicity Evaluation by Algal Growth Inhibition Test
論文名(和訳)
論文副題
発表会 Water and Environment Technology Conference(WET)2018
誌名 Water and Environment Technology Conference (WET)Program and abstracts
巻・号・回
発表年月日 2018/07/13 ~ 2018/07/15
所属研究室/機関名 著者名(英名)
水質チームYuji SUZUKI
京都大学Masatoshi NAKADA
京都大学Shuhei TANAKA
京都大学Satoru YUKIOKA
京都大学Ryota KITAO
抄録
In this study, 68 water samples were collected for analyzing three types of Total organic halogens (TOF, TOCl, TOBr) in the Lake Biwa ? Yodo River Basin. Survey was conducted on 5th September and 28th November, 2017. Samples were pre-treated by pre-packed activated carbon column (TXAPPC, Mitsubishi Chemical Analytech) followed by removal of inorganic halides using sodium nitrate. Analyses were conducted by combustion ion chromatography (AQF-100F, Mitsubishi Chemical Analytech and ICS-2000, Dionex). Limit of Detections (LODs) of TOF, TOCl, TOBr were provided as 28 ng-F/L, 646 ng-Cl/L, 40 ng-Br/L, respectively. Among total number of samples (68), TOF, TOCl, TOBr were detected above LOD in 67, 42, 64 samples, respectively. Among different water types (Lake water, river water, treated wastewater), on average, TOCl and TOBr were detected at the highest in treated wastewater (36,000 ng-Cl/L and 5,200 ng-Br/L) while TOF was detected at the highest in a specific area, the Ai river basin (22,600 ng-F/L). In addition, algal growth inhibition tests were conducted for some river water (n=12) and treated wastewater (n=8). Growth inhibition rate (median value) was 3.4% for river water while 0.2% for treated wastewater.
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