Summary: | Ozone-based processes are part of the Advanced Oxidation Processes that have been applied on leachates from landfills. The highly toxic characteristics of landfill leachates can be reduced by ozone-based processes, which have been shown to achieve high removals of pollutants, especially recalcitrant organic compounds. In this review, recent information is compiled (2015 to 2021) regarding ozone-based processes, where the efficacy as a treatment has been studied, the optimal conditions are analyzed according to the type of leachate and the treatment method to be used. The implementation trend is identified as pre-treatment and post-treatment coupled with conventional processes.
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