SMX degradation by ozonation and UV radiation: A kinetic study

► Less effective degradation by ozonation than by UV for Sulfamethoxazole (SMX). ► SMX degradation by ozonation and UV well fitted to a pseudo first-order kinetic model. ► UV pretreatment boosts efficient ozonation of SMX in presence of humic acid. ► Alkalinity, NOM, ozone concentration and UV intensity largely affect SMX degradation.