Method for processing 3, 4-dichloroaniline in water

The invention discloses a method for processing 3, 4-dichloroaniline in water. A high voltage electrode and a low voltage electrode are put in water body containing 3, 4-dichloroaniline to form a medium for resisting discharged electrodes, wherein the low voltage electrode contacts with water body to jointly form an earth electrode, the high voltage electrode connected with a power supply is separated from the water body by a medium of glass, air is introduced between the high voltage electrode and the medium of glass to form the medium for resisting discharge, thereby treating the water body; photocatalyst of titanium dioxide is added to the water body before the medium resists discharge, and ultraviolet light generated by plasma and photocatalyst can generate unique 'synergistic effect', thereby greatly improving degradation efficiency. The invention can effectively remove 3, 4-dichloroaniline component with biological toxicity in waste water for removing aniline. Compared with other plasma methods for resisting discharge by media, the invention has high degradation efficiency, short treatment time, small energy consumption, and simple and convenient devices of reactors and operation, etc.