Origin of natural organic matters in drinking water reservoir and relationship with trihalomethane formation potential

饮用水水库天然有机质来源及其与三卤甲烷形成潜力的关系

• 批准号: 10680535
• 负责人: FURUMAI Hiroaki
• 金额: $ 2.5万
• 依托单位: the University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680535/
• 关键词: Natural organic matter; Trihalomethane formation potential; Drinking water reservoir; Pyrolysis GC; MS; GPC; Algae; Sediment; molecular weight fractionation; 溶出; 富栄養化

1. Establishment of method to characterize natural organic matter (NOM)A method was established to characterize NOM by Pyrolysis-GC/MS, GPC and UF fractionation. And a method to concentrate diluted samples such as water in drinking water reservoir was also established by utilizing reverse osmosis and freeze-dry. By these methods, we can evaluate NOM from its pyrogram, molecular weight distribution, dissolved organic matter concentration (DOC), trihalomethane formation potential (THMFP) and UV absorbance both in raw sample and fractionated one.2. Seasonal change of NOM in drinking water reservoir, Lake TsukuiIn Tsukui Lake, DOC and THMFP was higher in summer than in winter. Molecular weight fraction between 1,000 to 10,000 dalton had higher specific THMFP (=THMFP/DOC) than fraction less than 1,OOO dalton.3. Characterization of released NOM from sediment of drinking water reservoirSediment released tests were conducted with sediment and bottom layer water in Tsukui Lake. THMFP rose up to 300μg/L under aerobic condition and 764μg/L under anaerobic condition in 21 days. Anaerobic environment enhanced DOC release and increased THMFP more than aerobic one. Specific THMFP showed less difference between these two DO condition and rather stable in time (34μg/mg on average). From the viewpoint of molecular weight distribution by GPC, NOM released under anaerobic condition had three peaks in its chromatogram at 10ィイD15ィエD1, 10ィイD13ィエD1 and 10ィイD12ィエD1〜10ィイD13ィエD1 dalton, although those in aerobic condition had an additional and large peak at 10ィイD12ィエD1 dalton. As these results, we could evaluated the difference between released NOM under anaerobic and aerobic condition by molecular weight distribution while specific THMFP showed little difference.

1.天然有机物(NOM)表征方法的建立建立了用热解-GC/MS、GPC和UF分级表征NOM的方法。并建立了利用反渗透和冷冻干燥对饮用水水库中的水等稀释样品进行浓缩的方法。通过这些方法，我们可以从原始样品和分馏样品中的热解图、分子量分布、溶解有机物浓度（DOC）、三卤甲烷形成电位（THMFP）和紫外吸光度来评价NOM。2．筑井湖饮用水水库NOM季节变化 筑井湖DOC和THMFP夏季高于冬季。分子量在 1,000 至 10,000 道尔顿之间的级分比小于 1,000 道尔顿的级分具有更高的特异性 THMFP (=THMFP/DOC)。3．饮用水水库沉积物释放 NOM 的表征利用津久井湖沉积物和底层水进行了沉积物释放测试。 21天内，有氧条件下THMFP上升至300μg/L，厌氧条件下上升至764μg/L。厌氧环境比有氧环境增强了 DOC 释放并增加了 THMFP。特异性 THMFP 在这两种 DO 条件之间表现出较小的差异，并且在时间上相当稳定（平均 34μg/mg）。从GPC的分子量分布来看，厌氧条件下释放的NOM在其色谱图中在10ィイD15ィエD1、10ィイD13ィエD1和10ィイD12ィエD1〜10ィイD13ィエD1道尔顿处有3个峰，尽管在有氧条件下释放的NOM条件在 10ィイD12ィエD1 道尔顿处有一个额外的大峰值。根据这些结果，我们可以通过分子量分布来评估厌氧和好氧条件下释放的 NOM 之间的差异，而特定 THMFP 几乎没有差异。

项目成果

中島典之: "津久井湖底泥溶出水のトリハロメタン生成能と有機物分子量分布"第51回全国水道研究発表会講演集. (印刷中). (2000)

Noriyuki Nakajima：“津久井湖泥浸出水的三卤甲烷产生能力和有机分子量分布”第51届全国供水研究会议论文集（2000年出版）。

中島典之: "津久井湖湖水中有機物の熱分解GC/MSを用いた特性評価" 第33回日本水環境学会年会講演集. (発表予定). (1999)

Noriyuki Nakajima：“利用热解 GC/MS 对津久井湖水中的有机物进行特征评估”日本水环境学会第 33 届年会论文集（预定报告）。

中島典之: "津久井湖湖水中有機物の熱分解GC/MSを用いた特性評価"第33回日本水環境学会年会講演集. 305 (1999)

Noriyuki Nakajima：“利用热解 GC/MS 对津久井湖水中的有机物进行特征评估”日本水环境学会第 33 届年会记录 305 (1999)。

THAPA Phatta Bahadur: "Characterization of organic matter released from bottom sediment of a drinking water reservoir under aerobic and anaerobic conditions"第34回日本水環境学会年会講演集. (3月発売予定). (2000)

THAPA Phatta Bahadur：“有氧和厌氧条件下饮用水水库底部沉积物释放的有机物的特征”日本水环境学会第 34 届年会论文集（计划于 2000 年发布）。

中島典之: "津久井湖底泥溶出水のトリハロメタン生成能と有機物分子量分布"第51回全国水道研究発表会講演集. (3月発売予定). (2000)

中岛典之：《津久井湖泥浸出水的三卤甲烷生成能力和有机分子量分布》第51届全国供水研究会议论文集（预定2000年3月出版）。