Influence of Ozonation on Sulfur, Nitrogen, Chloride and Phosphorous Systems in Public Drinking Water Supplies

摘要

The use of ozone as a treatment process for public drinking water is of interest because other methods include a concern relative to the ingestion of chloroform and other trihalomethanes. Ozone which decomposes rapidly in water to form oxygen deters the possibility of formation of other hazardous species. Most studies on ozonation have dealt with sterilization, color, taste, and odor removal. This study investigated the effect of ozonation on the concentration of selected phosphorus, sulfur, nitrogen and chloride species present in raw drinking water supplies. The following observations were made. No effect on the concentration of either phosphate or chloride was detected. The concentration of sulfide and sulfite was reduced to below detection limit of the method used when intermediate or high concentrations of ozone was applied. The concentration of sulfate was only slightly elevated corresponding to the conversion of limited amounts of sulfite to sulfate. For the nitrogen system no effect was detected for treatment of samples containing ammonia. The nitrite concentration however was reduced to below the detection limit for the method when intermediate and high levels of ozone treatment were employed.