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THE INFLUENCE OF DOM CHARACTER ON OZONE DECOMPOSITION RATES AND RCT
Citation:
Elovitz*, M S., U. von Gunten, AND H. P. Kaiser. THE INFLUENCE OF DOM CHARACTER ON OZONE DECOMPOSITION RATES AND RCT. Chapter 16, S. E. Barrett (ed.), ACS Symposium Series 761: Natural Organic Matter and Disinfection By-products. ACS, Washington, DC, , 248-281, (2000).
Impact/Purpose:
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Description:
The effects of DOM character on ozonation of natural waters and solutions of DOM isolates were investigated. Batch kinetic investigations measured O3 decomposition rate constants and Rct values. Rct describes the ratio of ?OH concentration to O3 concentration, and thus provides an indirect measurement of the transient steady-state concentration of ?OH during ozonation. Experiments were conducted on a series of different whole waters, for two whole waters over the course of a year, and in a series of well-characterized DOM isolate solutions. O3 decomposition rate constants and Rct varied as much as two orders of magnitude in both the series of whole waters and DOM isolates. Correlation analyses between the kinetic parameters and water quality and DOM descriptors were performed to identify possible surrogates for rate constants and Rct. Depending on the experimental series (i.e. whole waters, seasonal variations, DOM isolates), different potential surrogates were identified.
