METHOD FOR MEASURING DEGRADATION AND ADSORPTION OF ANIONIC SURFACTANT AES IN DISPLACED SOIL AT CONSTRUCTION

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  • NAITO Ryoji
    国土交通省 国土技術政策総合研究所 沿岸海洋・防災研究部 海洋環境研究室
  • AKIYAMA Yoshihiro B.
    国土交通省 国土技術政策総合研究所 沿岸海洋・防災研究部 海洋環境研究室
  • YOSHIMURA Kanami
    国土交通省 国土技術政策総合研究所 沿岸海洋・防災研究部 海洋環境研究室
  • HAGINO Yuki
    (株)東京久栄 環境部 環境技術課
  • TAMURA Akira
    田村技術⼠労働安全事務所
  • OKADA Tomonari
    国土交通省 国土技術政策総合研究所 沿岸海洋・防災研究部 海洋環境研究室

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Other Title
  • 陸上発生土に含まれる陰イオン界面活性剤(AES)の分解及び吸着に関する実験手法の検討

Description

<p> Terrestrial soil excavated during construction is expected to be utilized as environmental improvement materials in marine area. However, it is a problem that soil generated by shield tunnel excavation often contains surfactants. With focusing on polyoxyethylene alkyl ether surface (AES), which is a typical main component in the surfactants, we considered the experimental methods to assess the natural degradation of AES in soil and the adsorption to soil. As the results regarding the degradability experiment, the following points to note were suggested to be considered: keeping the moisture content of the soil to the liquid limit; the shaking operation is performed in a dark place at 5 °C; shaking the soil in water at least for two hours, etc. Regarding the adsorption experiment, the following points were needed to be considered; a stirrer-type operation is applicable instead of shaking-type operation for the stirring processing; the solid-liquid ratio is appropriate 1:50 for black clayey soil.</p>

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