水処理における薄膜状固定化光触媒の反応特性に関する研究

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The kinetics of water treatment using thin-filmed photocatalyst of titanium dioxide were investigated using phenol and methylene blue as a test substrate, respectively. Effects of initial concentration of substrates, specific surface area of titanium dioxide to sample volume, UV intensity and rotating rate of stirrer tip were correlated with reaction rate to elucidate the kinetics of photocatalytic reaction. The kinetics of immobilized photocatalytic reaction followed the Langmuir-Hinshelwood (L-H) equation. The reaction rate increased in proportion to surface area coated with titanium dioxide. The rate coefficient of L-H equation was affected by UV intensity and was independent from rotating speed, while the adsorption coefficent of L-H equation was affected by rotating rate of stirrer tip and independent from UV intensity. Using a pilot scale plant in Tamagawa water purification, degradation rates of phenol and methylene blue were comparable to those based on the kinetics above. River water was also used as source water and treated with photocatalytic reactor, where TOC and 260nm absorbance were decreased 13 and 25% after 500-minute UV irradiation, respectively.
社団法人　日本水環境学会の論文
2001-08-10