STUDY OF THE CATALYTIC OZONATION OF HUMIC SUBSTANCES IN WATER AND THEIR OZONATION BY-PRODUCTS

It is shown that using transition metals, especially Mn(II) and Ag(I), during ozonation of humic substances in water allows important reduct ions in the content of organic matter. Characterization of the organic compounds resulting from ozonation was made by concentrating the samp le through liquid-liquid extraction or derivation with PFBOA.HCl, alon g with the GC/MS and GC/ECD techniques. In total, 110 different organi c compounds were identified using GC/MS, mainly carboxylic acids, arom atics, hydrocarbons, aldehydes, ketones, and furan-carboxylic acids. T he percentages of elimination or formation levels reached during ozona tion are discussed.