MX as an Index of Tocicity of Drinking Water in Distribution Systems

MX 作为供水系统中饮用水毒性指数

• 批准号: 14350288
• 负责人: ITOH Sadahiko
• 金额: $ 5.25万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350288/
• 关键词: chromosomal aberration test; transformation test; MX; disinfection by-products; chlorination; 塩素消毒; 変異原性; 染色体異常試験; 形質転換試験

It is impossible to determine and measure all substances in drinking water. The bioassay results used as comprehensive water quality indicators are expected to be utilized for water quality management. When disinfection by-products are used as indicators of drinking water quality, they should be chosen properly in water treatment process and water distribution. In the water distribution systems, MX was supposed to be a suitable indicator. In this study, MX was found to be unstable in water due to the hydrolysis and the decomposition by chlorination. Also, it was found that the decay rate of MX in aqueous phase strongly depends on pH. The decay rate of MX is much faster in alkali region. Furthermore, MX decayed faster when higher chlorine was present. The activities inducing chromosomal aberrations and transformations of MX showed similar tendency. The activity inducing chromosomal aberrations and the activity inducing transformations measured by non-two-stage assay in Lake Biwa increased rapidly after the addition of chlorine, and then began to decrease gradually. MX seemed to be an appropriate indicator qualitatively and quantitatively for the toxicity of chlorinated water in distribution system. However, it was necessary to take the residual chlorine into consideration.

不可能确定和测量饮用水中的所有物质。预计用作全面水质指标的生物测定结果将用于水质管理。当将消毒副产品用作饮用水质量的指标时，应在水处理过程和水分配中正确选择它们。在水分配系统中，MX被认为是合适的指标。在这项研究中，由于水解和氯化的分解，MX在水中被发现不稳定。同样，发现水相中MX的衰减速率很大取决于pH。在碱区域，MX的衰减速率要快得多。此外，当存在较高的氯时，MX衰减更快。诱导染色体畸变和MX转化的活性显示出相似的趋势。诱导染色体畸变的活性和通过在BIWA湖中非TWO阶段测定的诱导转化的活性迅速增加，然后开始逐渐减少。 MX在定性和定量上对于分配系统中氯化水的毒性是一个适当的指标。但是，有必要考虑残留的氯。

项目成果

Itoh, S., Nakano, A., Araki T: "Change of The Toxicity of chlorinated Drinking Water and MX as an Index"Water Science and Technology. 印刷中. (2004)

Itoh, S.、Nakano, A.、Araki T：“氯化饮用水的毒性和 MX 作为指标的变化”水科学与技术出版（2004 年）。

Itoh, S., Nakano, A., Araki, T.: "Changes in Activity Inducing Chromosomal Aberrations and Transformations in Chlorinated Water and Use of MX as an Index"Journal of Japan Society on Water Environment. Vol.26(8). 499-505 (2003)

Itoh, S.、Nakano, A.、Araki, T.：“氯化水中诱导染色体畸变和转化的活性变化以及使用 MX 作为指标”日本水环境学会杂志。

伊藤禎彦, 仲野敦士, 荒木俊昭: "塩素処理水の染色体異常誘発性・形質転換誘発性の変化過程と強変異原物質MXの指標性"水環境学会誌. 26(8). 499-505 (2003)

Yoshihiko Ito、Atsushi Nakano、Toshiaki Araki：“氯化水中染色体畸变和转化诱导的变化过程以及强诱变剂 MX 的指示特性”日本水环境学会杂志 26(8) (2003)。

伊藤禎彦: "信頼性分析を用いた水道水のジクロロ酢酸管理手法に関する一考察"環境衛生工学研究. 16・3. 107-112 (2002)

伊藤义彦：“利用可靠性分析的自来水二氯乙酸管理方法的研究”环境卫生工程研究16・3（2002）。

Itoh, S., Nakano, A., Araki, T.: "Change of The Toxicity of Chlorinated Drinking Water and MX as an Index"Water Science and Technology. (in press). (2004)

Itoh, S.、Nakano, A.、Araki, T.：“氯化饮用水毒性的变化和 MX 作为指标”水科学与技术。