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Photodegradation of surfactants. XV: Formation of SO4 ions in the photooxidation of sulfur-containing surfactants |
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| Authors: | Hisao Hidaka Kayo Nohara Kazuhiko Ooishi Jincai Zhao Nick Serpone Ezio Pelizzetti |
| Institution: | 1 Department of Chemistry, Meisei University, 2-1-1, Hodokubo, Hino, Tokyo 191, Japan 2 Department of Chemistry & Biochemistry, Concordia University, Montreal, Quebec, Canada c Dipartimento di Chimica Analitica, Universita di Torino, Via Giuria 5, Torino 10125, Italy |
| Abstract: | Three types of surfactants and related reference compounds containing sulfonate (-SO3Na), sulfate (-OSO3Na) or thioether carboxylate (-S-Cn-COOK) group were photodecomposed in an aqueous heterogeneous dispersion system. The photomineralization to SO42?ions was examined for the surfactants with different chemical structures. The photocatalytic activities of TiO2 and ZnO were compared for the sulfonates of dodecylbenzene sulfonate (DBS) and polystyrene sulfonate (PSS), the sulfates of sodium dodecyl sulfate (SDS), and the potassium salts of S-dodecylthioglycol acid (TGA), S-dodecylthiopropionic acid (TPA) and S-dodecylthiomalic acid (TMA). ZnO catalyst exhibited higher activity in the formation of SO42?ion than TiO2 catalyst. |
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