抄録
Methyleneblue active substance (MBAS), COD, NH3-N and Cl- concentrations in the water of the Tama River were measured from Feb. 1968 to May 1970.
From the results, it was confirmed that the Tama River has been polluted continuously with domestic and industrial sewage, and that the natural purification was also proceeding considrably in the midstream of the river.
Infrared spectroscopic data show that the existence ratio of LAS to ABS was found to be 20 : 80 (1967), 35 : 65 (1968) and 61 : 39 (1969). The ratio of LAS has been increasing year by year.
