Abstract This paper presents the preliminary results of photocatalytic oxidation of humic acid from water using two types of catalysts, i.e., TiO2 and Ag-doped TiO2 modified zeolite (TMZ and Ag-TMZ). TMZ and Ag-TMZ, with zeolite granulation of 315-500 ?Źm was synthesized by sol-gel method, and the morphology and composition of the unmodified/modified zeolite were characterized by BET (Brunauer–Emmet–Teller) method, X-ray Diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). The sorption process played a major role in photoxidation process, and a slight higher photodegradation rate of humic acid from water was obtained for TiO2 modified zeolite. The photodegradation process of humic acid from water by using catalysts of TiO2 and Ag-doped TiO2 led to a complete mineralization.