水環境学会誌
Online ISSN : 1881-3690
Print ISSN : 0916-8958
ISSN-L : 0916-8958
論文
近畿地方の河川にみられる陰イオン系界面活性剤(MBAS)の長期変動とその要因
古武家 善成天野 耕二
著者情報
ジャーナル フリー

1993 年 16 巻 5 号 p. 362-371

詳細
抄録
The long-term and seasonal variations of anionic surfactants in rivers of Kinki Region were statistically evaluated by using MBAS (methylene blue active substances) monitoring data during 1972-1988.
High concentrations over 1 mg·l-1 as the average for the observation period were found in 18% of the 440 monitoring stations, and 30% of the total stations indicated significant long-term variations of MBAS concentration which was charaterized by the decrease at high concentration points. The relation between the ratio of the population served by public sewerage and MBAS concentration suggests that the diffusion above 80% is necessary in decreasing to MBAS level below 0.5 mg·l-1 in urban rivers.
In many cases, MBAS correlated positively with BOD and negatively with water temperature at different stations and in different prefectures, and the contributions over 0.5 were obtained in multiple regression analysis with MBAS as criterion variable and BOD and water temperature as explanatory variables. These suggest that the two paramerers explain predominantly the variations of MBAS concentration in river waters.
著者関連情報
© 1993 公益社団法人 日本水環境学会
前の記事
feedback
Top