Decomposition of 2-chlorophenol using a tourmaline-photocatalytic system

10.0 wt.% tourmaline mineral was loaded onto amorphous TiO2 and treated at 100-900 degrees C to obtain anatase and rutile structures, respectively, and were used for the photodecomposition of 2-chlorophenol. Tourmaline (10.0 wt.%)/TiO2 (anatase) and pure TiO2 (anatase) adsorbed 2-chlorophenol at 15 ppm and 8 ppm, respectively. 2-Chlorophenol was completely decomposed after 42 h in 10.0 wt.% tourmaline/TiO2 (anatase), by a first-order rate equation. The decomposition rate increased with increasing catalyst amount and tourmaline concentration to give optimal conditions of 1.0 g/L and 12.5 wt.%, respectively. The decomposition of 2-chlorophenol was also affected by H2O2 addition and pH regulation. The decomposition rate reached 40.0 ppm/h when 10.0 mL/L of H2O2 was added to the feed solution, and 100 ppm of 2-chlorophenol was completely removed after 21 h at pH 11.0. (C) 2008 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.