Method for controlling generation of disinfection by-products in drinking water by using UV-LED light source

The invention relates to a method for controlling the generation of disinfection by-products in drinking water by using a UV-LED light source. The method comprises: (1) adding sulfuric acid or sodiumhydroxide to natural drinking water, adjusting the pH value of the drinking water to achieve a weakly alkaline state, adding free chlorine, and uniformly stirring to obtain a mixed solution; and (2) irradiating the mixed solution under UV-LED light with a wavelength of 270-280 nm until the treatment is completed. Compared with the method in the prior art, the method of the invention has the following characteristics that the UV-LED light source with the wavelength of 270-280 nm is used so as to rapidly reduce the content of the disinfection by-product precursor and effectively reduce the riskof the disinfection by-product generation during the disinfection, the method has characteristics of simple operation and easily-controlled reaction conditions, the used chemical reagent and the usedmaterials are conventional