Original scientific paper
https://doi.org/10.15255/CABEQ.2023.2202
Kinetic Study of the Ozonation of Atrazine
N. Šoltýsová
orcid.org/0009-0004-0640-4759
; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
J. Derco
; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
A. Horná
; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
Abstract
The kinetic study of the ozonation of atrazine as a single contaminant characterized as COD was studied. A jet loop ejector reactor was used to improve the mixing and transfer of ozone in the reaction system. The results show a higher efficiency of atrazine degradation in alkaline pH during the first 45 minutes. At the same time, the dechlorination of atrazine is faster than in neutral pH. Respirometric measurements carried out with activated sludge were used to evaluate the effect of atrazine and the ozonation intermediates on microorganisms’ oxygen uptake rate. The results showed that ozonation performed at an alkaline pH resulted in the formation of substances that are more rapidly biodegradable compared to substances formed by ozonation at neutral pH, as well as compared to atrazine.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Keywords
atrazine; dechlorination; immediate biodegradability; kinetic equation; ozonation; pH effect; radical mechanism; respirometric measurements; toxicity
Hrčak ID:
313479
URI
Publication date:
19.1.2024.
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