Method for removing organic pollutants in water by using hydroxyl free radicals generated by organic membrane

The invention provides a method for removing organic pollutants in water by using hydroxyl free radicals generated by an organic membrane. The method adopting a nitrocellulose membrane as a photocatalysis material comprises the following steps: placing the nitrocellulose membrane in water, and illuminating the nitrocellulose membrane with sunshine or a sun lamp with the wavelength being greater than 280 nm as a light source to make the nitrocellulose membrane undergo a membrane surface photochemical reaction in order to generate hydroxyl free radicals, wherein the generation rate of the hydroxyl free radicals is adjusted through adjusting the surface area of the membrane and the light intensity. The generated hydroxyl free radicals can well remove phenol, bisphenol A, thiamphenicol and other typical organic pollutants in water. The hydroxyl free radical generation method has the advantages of simplicity, high economy, high efficiency, no introduction of any hydroxyl free radical precursors to an aqueous solution, and no secondary pollution due to generation of the hydroxyl free radicals on the surface of a solid membrane, and can be applied to the field of wastewater treatment.