Monitoring of anionic surfactants in Ankara stream

Anionic surfactant levels (mg/ml) and pollution load (MBAS kg/day) of the Ankara stream were determined with the MBAS method during 12 month periods, from 1979 to 1980, 1990 to 1991 and 1994 to 1995. Results indicate that the mean anionic surfactant concentration and pollution load of the water in 1994 gradually decreased compared to the 1979-1980 and 1990-1991 periods. Anionic surfactant levels for the periods are 1.3±1.10, 2.00±0.79 and 0.92±0.35, respectively. These data are discussed considering the 1987 prohibition of tetrapropylene benzen sulfonate (TBS) in Turkey and also by commenting the impact of other pollutants present in the stream