MN(II)-CATALYZED OZONATION OF RAW EBRO RIVER WATER AND ITS OZONATION BY-PRODUCTS

It is shown that using Mn(II) as a catalyst during ozonation of raw Eb ro river (Spain) water allows reductions in the content of organic mat ter. Characterization of the raw and ozonated water at two different O -3:C weight basis ratios was made by concentrating the sample through liquid-liquid extraction or derivation with O-(2,3,4,5,6-pentafluorobe nzyl)-hydroxylamine hydrochloride (PF-BOA.HCl), along with the gas-chr omatography/mass-spectrometry (GC/MS) and electron capture detector (G C/ECD) techniques. A total of 88 different organic compounds were iden tified, mainly carboxylic acids, aromatics, aldehydes, ketones and alc ohols. The percentage of elimination or formation levels reached durin g ozonation are discussed. (C) 1998 Elsevier Science Ltd. All rights r eserved.