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Perfluorooctane sulfonic acid (PFOS: C7F15SO3H) is an excellent surface-active agent and has been widely used in various applications. However, PFOS is a bioaccumulating substance and has toxic effects on the human body. We recently found that plasma generated in gas bubbles can decompose PFOS very efficiently and rapidly [1]. During the PFOS decomposition process using plasma, perfluorocarboxylic...