Abstract:The composite photocatalysts were made by solid dispersion method with hydrophobic Zeolite and nanometer titanium dioxide. The removals of oxytetracycline (OTC) in water by UV/ Hydrophobic Zeolite loaded with different ratio of TiO2 were investigated respectively under the irradiation of 32W low-pressure mercury lamps. The effects of composite photocatalyst quantity, initial OTC concentration and pH were studied. It is showed that UV/Composite photocatalyst with 40% TiO2 and 60% hydrophobic Zeolite is the best way to remove OTC in water compared to the others. 99% of OTC (50 mg.L-1) in ultrapure water mixed with 500 mg.L-1 composite photocatalyst degrades within 150 min under UV irradiation. And after 6 hours, 86% TOC of the OTC solution is removed. It is found that the degradation rate is quicker when the OTC initial concentration is lower and initial pH is higher.