Journal
WATER RESEARCH
Volume 39, Issue 10, Pages 2136-2144Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2005.03.021
Keywords
trihalomethane (THM); haloacetic acids (HAA); ozone; UV; advanced oxidation process (AOP); natural organic matter (NOM)
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The. efficacy of using ozone (O-3), ultraviolet irradiation (UV) and the combined O-3-UV advanced oxidation process (AOP) to remove 2 classes of disinfection by-product (DBP) precursors from raw surface water samples have been evaluated and compared. In particular, trihalomethane and haloacetic acids formation potentials were measured. Laboratory batch scale experiments were carried out as a function of ozone and UV dosage in order to study the removal kinetics. It, is concluded that the combined O-3-UV AOP is more effective than either the ozone or UV treatment alone. Ozone-UV AOP is capable of mineralizing up to 50% of the total organic carbon from the raw source water at an ozone dose of 0.62 +/- 0.019 mg O-3/mL and a UV dose of 1.61 Ws/cm(2). In addition, O-3-UV AOP can reduce trihalomethane formation potential by roughly 80% and haloacetic acids formation potential by roughly 70% at the same ozone and UV dosage. (c) 2005 Elsevier Ltd. All rights reserved.
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