Trihalomethane Precursor Removal by Ozone and Ultraviolet Radiationby Charles E. DiGerlando, Post, Buckley, Schuh, &, Jernigan, Inc, Winter Park, United States,
John D. Dietz, Post, Buckley, Schuh, &, Jernigan, Inc, Winter Park, United States,
Abstract: The research objectives were definition of trihalomethane formation potential (THMFP) reduction in groundwater matrix using ultraviolet radiation (UV) catalyzed ozone oxidation (UV/Ozone). A full factorial experimental design was used to isolate the effects of the applied ozone dose rate (AODR), the UV dose rate, and the matrix pH on the rate of trihalomethane (THM) precursor destruction. Temperature and pH had no significant effect on the kinetics within the levels tested, 7-40°C and 6.2-8.7 standard units (SU) respectively. The kinetic model developed was, therefore, a function of the AODR, the UV dose rate, and the THMFP. These experiments also demonstrated the ability of UV/Ozone to effectively reduce levels of THMFP to near detectable limits (1 ppb).
Subject Headings: Ultraviolet radiation | Trihalomethanes | Ozone | Oxidation | Kinetics | Matrix (mathematics) | pH | Water treatment
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