Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.35, sa.3, ss.1285-1295, 2020 (SCI-Expanded)
In this study, the treatment of humic acid (HA) solutions that represent natural organic materials in surface waters and prepared synthetically by montmorillonite enriched with silver-based nanoparticles (AgNP@MMT) catalyzed ozonation processes was investigated. Degradation of natural organic matter and changes in aliphatic-aromatic structure were observed in treatment studies where catalyst doses were changed. The variability in the removal of DOC depending on the increase in the amount of catalyst was between 67.80-76.61%. In addition, the presence of OH radicals in heterogeneous catalytic ozonation, has been indicated using tert-butyl alcohol (TBA), known as organic radical scavengers. Trihalomethane (THM) and Haloacetic Acid (HAA) species formed by the disinfection process with chlorine were analyzed quantitatively and other oxidation intermediates were determined qualitatively. The formation potential of THM and HAA was decreased by a maximum of 79.50% and 80.40% depending on the catalyst dose and time increase. Small molecular weight intermediates resulting from the degradation of HA by catalytic ozonation react with center dot OH in the medium and form different intermediate product groups. When the structure of the intermediates detected in the environment was examined, it has seen that generally aldehyde, ketone and acid groups were dominant. Analysis results showed that the most important aldehydes were benzaldehyde and 2.4-dihydroxy-6-(2'-oxoheptyl)benzaldehyde