2012/08/01 by Rafaela T. P. Sant'Anna, Rafaela Thereza Pereira Sant’Anna, Cristina Maria P. Santos +8
Biochemistry, Genetics and Molecular Biology · Environmental Science · #Chemical Analysis and Environmental Impact #Water Treatment and Disinfection #bioluminescence and chemiluminescence research
paper · pdf · doi:10.1590/s0103-50532012005000017
openalex publication_date 2012/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The kinetics of chlorate-chloride reaction was studied following the formation of ClO2• by UV-Vis spectroscopy. For comparison with other results in the literature, the initial rate was measured after small induction period. The results show a special effect of a saturation profile for the initial chloride concentration, suggesting the formation of the intermediate Cl2O3(2-). At low chloride concentration, the reaction orders for chlorate, chloride and H+ were 1.03 ± 0.05, 1.02 ± 0.03 and 2.80 ± 0.03, respectively. These order values must be considered with care because they were calculated using the maximum rate values after induction period. In fact, the presence of this induction period indicates that the system is complex. Then, a mechanism was proposed to explain the experimental results, and includes the reaction between two ClOClO to form ClO2•. It was able to model the experimental curves at different [H+]0 and at low and high [Cl-]0.