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Photocatalytic degradation of phenol and chlorinated phenols using AgTiO2 in a slurry reactor

1994; Elsevier BV; Volume: 28; Issue: 8 Linguagem: Inglês

10.1016/0043-1354(94)90258-5

1879-2448

Rosana M. Alberici, Wilson F. Jardim,

Advanced Photocatalysis Techniques

Photodegradation of phenol (PhOH), 2,4-dichlorophenol (2,4-DCP), 2,3,5-trichlorophenol (2,3,5-TCP) and pentachlorophenol (PCP) was investigated using an open upflow slurry reactor and TiO2 (Ag-loaded) as photocatalyst. Light was provided by three 125 W high-pressure mercury lamps. Best degradation rates were obtained using 250 mg l−1 of AgTiO2 in the presence of H2O2 and a constant supply of air (1.71 min−1). Under this optimized condition, destruction rate constants obtained for a 1 × 10−4M solution of PhOH, 2,4-DCP, 2,3,5-TCP and PCP were 0.0493, 0.0430, 0.0367 and 0.0356 min−1, respectively. Each gram of phenol required 1.70 kW for its photodestruction.