A study on the kinetics of ozone decomposition in waters of different quality

The kinetics of ozone decomposition in waters of different quality, namely distilled water, tap water previously treated with ozone, tap water not treated with ozone and raw water from an accumulation lake, were studied in a batch stirred reactor at different temperatures (18-28?C). The dissolved oz...

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Bibliographic Details
Published in:Hemijska industrija 2004, Vol.58 (3), p.118-122
Main Authors: Takic, Ljiljana, Lazic, Miodrag, Veljkovic, Vlada, Pejanovic, Srdjan
Format: Article
Language:English
Subjects:
Decomposition
Decomposition reactions
Distilled water
Drinking water
Empirical equations
Kinetic equations
Kinetics
Ozone
Rate constants
Reaction kinetics
tap water
Titration
waste water
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Summary:The kinetics of ozone decomposition in waters of different quality, namely distilled water, tap water previously treated with ozone, tap water not treated with ozone and raw water from an accumulation lake, were studied in a batch stirred reactor at different temperatures (18-28?C). The dissolved ozone concentration was measured by the iodometric titration method. It was determined that an empirical kinetic equation of the form: dc(O3)/dt= k0 + k1c(O3) fitted the experimental data better than a first-order reaction rate equation. The apparent reaction rate constants in the case of ozone decomposition in distilled water were shown to be a function of temperature in accordance with the Arrhenius equation. U radu su dati rezultati analize kinetike dekompozicije ozona u vodama razlicitog kvaliteta (destilovana voda, pijaca voda prethodno tretirana ozonom, pijaca voda koja nije tretirana ozonom i sirova voda iz akumulacionog jezera Barje) u sarznom reaktoru sa mesanjem, pracenjem promen? koncentracije slobodnog ozona u vodi sa vremenom, na temperaturama u intervalu od 18 do 28?C. Odredjen je zakon brzine reakcije dekompozicije ozona: -dc(O3)/dt = ko + k1c(O3) koji bolje "fituje" eksperimentalne podatke od jednacine za brzinu reakcije prvog reda. Prividne konstante brzine dekompozicije ozona u destilovanoj vodi, ko and k1, pokoravaju se Arenijusovoj zavisnosti od temperature.
ISSN:0367-598X
2217-7426
DOI:10.2298/HEMIND0403118T