Concentrations of Surfactant-derived Impure and Degradation Compounds in River Waters and Water Supplies

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  • 河川水及び水道水中の界面活性剤不純物と分解生成物濃度
  • カセンスイ オヨビ スイドウ スイチュウ ノ カイメン カッセイザイ フジュンブツ ト ブンカイ セイセイブツ ノウド

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Abstract

The concentrations of surfactant-derived impure and degradation compounds in water samples from the TE river differ among water sampling station. The concentration ranged from about 0.01 to about 0.20μg/l for alkylbenzene, from under quantification limit to about 0.010μg/l for 4-t-butylphenol, from about 0.005μg/l to about 0.050μg/l for 4-t-octylphenol, from under quantification limit to about 0.50μg/l for nonylphenol, from under quantification limit to about 0.10μg/l for nonylphenol monoethoxylate, from under quantification limit to about 0.02μg/l for 4-t-butylphenoxy acetic acid, and from about 0.02μg/l to about 0.07μg/l for 4-t-octylphenoxy acetic acid; chlorides and n-type alkylphenols were not detected.<BR>In the TE river water, the anion surfactant concentration was estimated to be higher about 2, 000 times than alkylbenzene concentration, and the nonionic surfactant concentration to be higher about 200 times than the total concentration of nonylphenol and 4-t-octylphenol.<BR>No impure and degradation compounds derived from surfactants were detected in the water supplies. This is because these compounds react with chlorine, forming by-products.

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