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The Composition of Surfactants in River Water and its Influence to the Amount of Surfactants in Drinking Water

The ubiquitous distribution of surfactants in water particularly drinking water was reported to have variable potential for bioaccumulation which can lead to toxicity in the human system. In this study, the concentration of surfactants in untreated water (surface water of rivers) and respective treated water (tap and drinking water) were determined. Comparisons were made between surfactants found in surface water in both seasons e.g. dry and rainy season. Samples were analysed by colorimetric method as methylene blue active substances (MBAS) for anionic surfactant and disulphine blue active substances (DBAS) for cationic surfactant. The absorbance of the analytes were measured using UV-Vis Spectrophotometer at 650 nm and 628 nm, respectively. The results obtained showed that the concentration of surfactants was significantly high during dry season in both untreated waters. It was also found that rivers at the vicinity of town areas contained higher amount of cationic surfactants in both seasons (rainy = 0.20±0.21µmolL , dry = 0.54 ±0.15µmolL ), 11