US EPA

5343831 

Journal Article 

Kinetics of chlorate formation during ozonation of aqueous chloride solutions 

Levanov, AV; Isaikina, OY; Gasanova, RB; Uzhel, AS; Lunin, VV 

2019 

Yes 

Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298 

PERGAMON-ELSEVIER SCIENCE LTD 

OXFORD 

229 

68-76 

English 

31075704 

10.1016/j.chemosphere.2019.04.105 

WOS:000471087400009 

https://linkinghub.elsevier.com/retrieve/pii/S0045653519307581
Exit
 

Chlorate ion ClO3- is formed as a result of the complex chemical interaction of ozone with chloride ion in aqueous solution. In neutral and basic solutions, chlorate is the main product. In acid solutions, the main product is molecular chlorine Cl2, and the yield of chlorate is 50-100 times lower. Dependencies have been studied of chlorate formation rate on significant experimental factors: concentrations of initial substances, ozone and chloride ion, acidity (pH), ionic strength and temperature of the reaction solution. The kinetic laws of chlorate generation have been established, and the expressions are given for rate constants of chlorate formation as functions of temperature and ionic strength. When tert-butanol is added to the reaction system, the formation of chlorate ceases, which is an evidence of the crucial role of free radical reactions in this process.