Method for decomposing or oxidizing dioxins and/or poly chlorinated biphenyls contained in liquid

Abstract

An object of the present invention is to provide a simple method which can efficiently convert dioxins and/or PCBs contained in liquid into unharmful substances. Such a method according to the present invention is by introducing a liquid containing dioxins and/or PCBs, and oxygen containing gas to a reactor in which catalystexists, and conducting wet-oxidation reaction under liquid phase condition of the introduced liquid. According to the present inventive method, a simple method which can efficiently extract dioxins, PCBs and/or component containing thereof, from soil may be provide by a method comprising of; contacting soil and/or ash containing dioxins and/or PCBs with a liquid. Further, the present invention provides a method for cleaning the unit used for decomposing or oxidizing dioxins and/or PCBs contained in liquid by introducing cleaning solution to the unit and conducting cleaning operation under liquid phase condition.

Dependencies are inferred from the claim text.