Abstract
The distribution of polyoxyethylene nonionic surfactants [as iodobismuthate active substances (BIAS)] in river waters in Kanagawa Prefecture (the Tama, the Tsurumi, the Katabira, the Hirasaku, the Sakai, the Hikichi, the Sagami, the Kaname and the Sakawa) from 1978 to 1979 were investigated.
The concentrations of BIAS in 91 samples were below 0.02 - 9.5 mg/l, and about 22% of the whole were below 0.02 mg/l and about 80% of the whole were below 0.20 mg-/l.
The concentrations of BIAS in sea waters (14 samples; the Tokyo Bay and the Sagami Bay) were below 0.02 mg/l.
The mean value of BIAS was 1.5 mg/l for the R. Katabira and it was higher than that of the other rivers.
Water pollution of the R. Katabira was strongly effected by the textile industrial wastes.
The correlations between BIAS and the other water quality indexes in river waters were discussed.
