α-オレフィンスルホン酸塩に含まれるアルケンおよびヒドロキシアルカンスルホン酸塩の相対的生分解速度に関する研究

概要

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Major components of α-olefin sulfonate (AOS) are alkene sulfonates and hydroxyalkane sulfonates. The relative biodegradation rate of alkene selfonate and hydroxyalkane sulfonate was measured to investigate the biodegradation process of AOS by activated sludge, by the use of a gas chromatographic analysis after having converted the residual sulfonates to sulfonyl chloride derivatives. Four α-olefin sulfonates of single carbon chain C15, C16, C17 and C18 were partially biodegraded respectively upto ca. 50% degradation level, and in all cases, it was found that the biodegradation rate of the alkene sulfonate was two times or more rapider than that of the hydroxyalkane sulfonate. It was observed that there was little difference in biodegradation rate caused by different carbon chain length of lipophilic group. The similar result was also obtained, with 50 to 70% degraded samples of the three C15 to C18 AOS mixtures, which had different disulfonate content.