Method for disinfecting water body based on visible light catalysis of multi-component composite material

Abstract

The invention belongs to the technical field of water body disinfection, and discloses a method for disinfecting a water body based on visible light catalysis of a multi-component composite material, which comprises the following steps: preparing a magnetic nano-silver / graphene composite material; adding the prepared magnetic nano-silver / graphene composite material with the two-dimensional nano-structure and the activated carbon loaded with the photocatalytic material into a water body; a trace amount of hydrogen peroxide is added into the water body, visible light catalytic reaction is excited under visible light irradiation, and harmful bacteria in the water body are killed; and carrying out ultraviolet disinfection by adopting an ultraviolet lamp, and after the reaction is finished, carrying out magnetic separation to recover the magnetic nano-silver / graphene composite material in the water body, so as to obtain the purified water after disinfection treatment. According to the invention, ultraviolet rays and the nano-silver / graphene composite material are cooperated to disinfect the water body, the disinfection effect is good, the nano-silver / graphene composite material has a good antibacterial effect, the water body can be neutralized by using activated carbon, secondary pollution to the water body is avoided, and the water body disinfection device is safe, efficient and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of water body disinfection, in particular to a method for catalyzing water body disinfection based on multi-component composite materials with visible light. Background technique [0002] Water disinfection mainly uses chemical or physical methods to kill pathogens in water to prevent disease transmission and maintain human health. Among them, physical disinfection methods include heating method, gamma radiation method and ultraviolet irradiation method; chemical disinfection methods include adding heavy metal ions (such as silver and copper), alkali or acid, surfactant chemicals, oxidants (chlorine and its compounds, bromine, iodine, ozone) and other disinfection methods. Among these methods, oxidant disinfection is the most widely used, among which chlorine and its compounds are particularly common, followed by ozone disinfection. The ultraviolet irradiation method and the method of adding bromine, iodin...

AI Technical Summary

Problems solved by technology

[0004] In summary, the problems in the prior art are: the nano-silver used in the prior art has poor stability and poor bactericidal effect; at the same time, the existing water body disinfection materials will cause secondary pollution to the water body, while a single ultraviolet or ozone disinfection Poor disinfection effect

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