To provide a method and an apparatus for decomposing a large quantity of an environmental pollutant such as an organohalogen compound contained in waste water in a short time up to the concentration of the environmental pollutant becomes low enough to discharge to a sewer or the like and furthermore, decomposing organic matter hardly to be decomposed oxidatively, a compound containing nitrogen and phosphorus or the like.
A sample solution 20 in a reaction vessel 10a where an aqueous solution containing the environmental pollutant in stored is irradiated with an ultrasonic wave 50 from an oscillator 30a arranged is the center of the bottom of the vessel 10a and also irradiated with an ultraviolet ray from an ultraviolet lamp 40a arranged in the inner periphery of the vessel 10a at the same time, for example. The lamp 40a is not arranged at the position to interface with the advancing route of the wave 50 substantially.
KITADE YUJIRO
KATO NOBUHISA
