Effect of advanced oxidation processes on nonylphenol removal with respect to chlorination in drinking water treatment

摘要

Any nonylphenol compounds found in water have to be removed since they are endocrinendisruptors. In this study, natural water from the river Ebro fortified with nonylphenol compoundsn(4n-nonylphenol and technical nonylphenol) is used as a sample in order to simulate a real situationnin drinking water treatment plants. The aim is to compare conventional disinfection with advancednoxidation processes (O3,O3/H2O2,O3/TiO2 and O3/H2O2/TiO2) used for the removal of nonylphenolncompounds present in natural water. Furthermore, a study is carried out of the by-products (THMs)ngenerated as a consequence of the presence of natural organic matter. Preoxidation by chlorinencompletely oxidizes 4n-nonylphenol and technical nonylphenol. It can be seen that the best ofnthe advanced oxidation processes is the O3/H2O2, achieving an average oxidation of 55%,nalthough the differences among the processes were not very significant. Furthermore, thenuse of post-chlorination guarantees the total removal of nonylphenol compounds.