Saha, Uttam Kumar creator Tanaka, Shuzo Chairperson Reutergardh, Lars Baetz Examination committee Visvanathan, C. Examination Committee Swedish International Development Authority Scholarship donor text series technical report th Bangkok Asian Institute of Technology 1993 continuing eng 66 leaves + 1 online resource The effects of pH on the photocatalytic decomposition of 2,4,6-trichlorophenol (TCP) with UV illuminated titanium dioxide powder in aqueous suspension were investigated. A first order reaction with respect to 2, 4, 6-TCP concentration was obtained. Higher degradation rate was observed under alkaline condition than acidic condition. The role of adsorption of 2,4,6-TCP onto the TiO2 surface was found insignificant in photocatalysis. The reaction rate was enhanced by the addition of sodium chloride at pH 10. But at pH 5 a decrease in reaction rate was observed. The photocatalytic decomposition of deaerated TCP solution with or without sodium chloride addition gives lower degradation rate than with dissolved oxygen at different pH. A mechanism for the reaction based on photogeneration of hydroxyl radical was proposed. For a 20 mg/L of 2,4,6-TCP the average rate of solar degradation resulted in a decrease in concentration to 2 mg/L within 160 min. Higher potentiality of solar energy for the purification of water containing 2, 4,6-TCP was found. A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1993 Sewage Purification Phenol removal Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B16675 http://203.159.5.9/ait-thesis/detail.php?q=B16675 230399 20260818095309.0