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ISSN 1811-0231 / ISEIS Publication Series Number P002

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  Paper EIA06-023, Volume 4 (2006), Pages 273-279 = complimentary

Reduction in Trihalomethane Formation Potential through Air Oxidation

R. S. Pirkle1, J. D. Jack1* and P. A. Bukaveckas2

1. University of Louisville, Center for Environmental Science, Biology Department, 139 Life Sciences Building, Louisville, KY 40292, USA. *Corresponding author: jeff.jack@louisville.edu.

2. Department of Biology, Center for Environmental Studies, Virginia Commonwealth University, 1000 W. Cary St., Richmond, VA 23284, USA.

 

Abstract

Trihalomethanes (THMs) are disinfection byproducts that have come under increasing scrutiny during the past 10 years due to a tightening of regulations by the United States Environmental Protection Agency. Current methods for reducing THM precursors in drinking water involve strong oxidizers (i.e. ozone and various forms of permanganate) which pose a number of safety issues for plant operators and for the general public. In a bench-scale experiment, we assessed the efficacy of a weaker oxidizing agent, bubbled air, in the reduction of THMFP. Hypolimnotic samples taken from two drinking water reservoirs in central Kentucky (USA) and finished drinking water from the water plant were used in this experiment. Results indicate that THMFP in finished water was reduced by 20 – 50% following air oxidation while source water samples showed inconsistent and non-significant results. These results indicate that air oxidation may help reduce the formation of THMs in the distribution system by removing precursors but would not be an effective strategy for reducing THMFP in source waters.


Keywords: trihalomethane, THM, THMFP, disinfection byproducts, water quality

 

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