title: Photo-electrochemical degradation of some chlorinated organic compounds on n-TiO2 electrode.
abstract: The electrolysis of some chlorinated organic compounds such as chloroacetic acids, chloromethanes and chloroethenes were carried out on a photo-irradiated n-TiO(2) electrode applied a constant potential, 1.0 V vs. Ag/AgCl, and the alternated pulse potentials of +1.0 V and various negative potentials, -1.0, -1.2 and -1.4V vs. Ag/AgCl in 0.1 mol dm(-3) Na(2)SO(4) solutions saturated with oxygen or with nitrogen. These compounds were degraded on the n-TiO(2) electrode by the photo-electrolysis and mineralized to carbon dioxide, carbon monoxide and chloride ion. When the alternated pulse potentials were applied, the mineralization yields were increased for these compounds, especially for trichloroacetic acid and carbon tetrachloride, both of which were comparatively stable to the degradation in the constant potential electrolysis. The presence of oxygen in the solution was effective for the mineralization of these compounds, while little effective for that of trichloroacetic acid and of carbon tetrachloride.
authors: Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, 3-7-5, Toyosu, Koto-ku, Tokyo 135-8548, Japan. ohtaka3@hotmail.com
authors: Takashi
authors: T
authors: Ohsaka
authors: Kazuyuki
authors: K
authors: Shinozaki
authors: Kazuhisa
authors: K
authors: Tsuruta
authors: Katsuhiko
authors: K
authors: Hirano
mesh_terms: D004566:Electrodes; D004572:Electrolysis; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry* / Q000302:isolation & purification; D010100:Oxygen / Q000737:chemistry; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D006843:Hydrocarbons, Chlorinated; D014874:Water Pollutants, Chemical; D014867:Water; C009495:titanium dioxide; D014025:Titanium; D010100:Oxygen