Alkylbenzene Sulfonate in the Water of the Tama River. V

Methylene blue active substance (MBAS), COD, Cl- and NH3-N concentrations in the water of the Tama River were measured at 4 points along the river and 1 point at the Nogawa (the branch of the Tama River).The results show that the MBAS concentration has been increasing continuously, and the correlations are found between MBAS and Cl-, and MBAS and NH3-N concentrations.The existence ratio of linear alkylate sulfonate (LAS) to branched chain alkylbenzene sulfonate (ABS) was measured using infrared spectroscopy. This ratio was found to be 15 : 85 and 20 : 80 at 2 points of the Tama River, and 25 : 75 at the Nogawa.