Characterization of Ntural Water for Potential to Oxidize Organic Pollutants with Ozone

摘要

A laboratory study has been designed to investigate the decomposition of ozone in natural water and to determien its potential to produce hydroxyl radicals for hte oxidation of micropollutants during the ozonation of drinking water. This report describes the first data obtained using a continuous flow reactor capable of observing reactions with relatively short itme scales (Q=34 mLmin; 1.4 < t_c < 27 sec). Rates of ozone decay were studied i nfulivic acid solution in the presence, or in the absence of radical scavengers (tert-butyl alcohol), a promotor of ozone decomposition (formic acid), and a micropollutant of interest (tetrachloroethylene). Also, three natural waters were studied, illustrating that Oh radical formatio nepends on chemical composition of the waters and correlates with absorbance at 254 nm of the solution.