1
Department of Chemical, Materials and Polymer Engineering, Buein Zahra Technical University, Buein Zahra, Qazvin, I.R. IRAN
2
Department of Environmental Research, Institute for Color Science and Technology, Tehran, I.R. IRAN
Abstract
Ozone (O3) is a strong oxidizing agent that breaks down refractory organic contaminants (ROCs) into smaller, less hazardous molecules. Ozonation has been widely used in water and wastewater treatment for disinfection and for the destruction of toxic organic pollutants. However, the efficiency of ozone utilization is low, the mineralization of organic pollutants by ozone oxidation is less effective, and some toxic disinfection byproducts (DBPs) are likely to be formed during the ozonation process. Catalytic ozonation can overcome these problems to some extent. During catalytic ozonation, catalysts can increase the efficiency of O3 decomposition and generate active free radicals. These active species can enhance the degradation and mineralization of organic pollutants. In heterogeneous catalytic ozonation (HCO), ozone is injected into the wastewater stream as a gas or as O3-enriched air. A solid catalyst improves ozonation efficiency by increasing the decomposition of O3 and the production of reactive oxygen species (ROS) that are capable of oxidizing ROCs. Metal oxides are the most commonly used catalysts. However, the type of catalyst used in the HCO process and how it reacts with O3 determine how much ROS is produced. The production of reactive oxygen species by different catalysts in the heterogeneous catalytic ozonation process is enhanced through different mechanisms that may affect the efficiency and selectivity of the process. The present study presents and discusses a comprehensive summary of research and developments in the catalytic ozonation process in the form of various sections including history, types of catalytic ozonation processes, homogeneous and heterogeneous catalysts widely used in this process, mechanisms of homogeneous and heterogeneous catalytic ozonation processes, the effect of operating parameters (initial pollutant concentration, catalyst loading amount, solution pH, and temperature) on the process, and finally the application of catalytic ozonation process for the destruction of toxic organic pollutants.
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Bagherzadeh,S. B. and Mahmoodi,N. M. (2026). A Review of Recent Advances in Water and Wastewater Treatment Using Catalytic Ozonation Process. Nashrieh Shimi va Mohandesi Shimi Iran, 44(4), 87-124.
MLA
Bagherzadeh,S. B. , and Mahmoodi,N. M. . "A Review of Recent Advances in Water and Wastewater Treatment Using Catalytic Ozonation Process", Nashrieh Shimi va Mohandesi Shimi Iran, 44, 4, 2026, 87-124.
HARVARD
Bagherzadeh S. B., Mahmoodi N. M. (2026). 'A Review of Recent Advances in Water and Wastewater Treatment Using Catalytic Ozonation Process', Nashrieh Shimi va Mohandesi Shimi Iran, 44(4), pp. 87-124.
CHICAGO
S. B. Bagherzadeh and N. M. Mahmoodi, "A Review of Recent Advances in Water and Wastewater Treatment Using Catalytic Ozonation Process," Nashrieh Shimi va Mohandesi Shimi Iran, 44 4 (2026): 87-124,
VANCOUVER
Bagherzadeh S. B., Mahmoodi N. M. A Review of Recent Advances in Water and Wastewater Treatment Using Catalytic Ozonation Process. NSMSI, 2026; 44(4): 87-124.