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

摘要

The present invention relates to 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 includes introducing a liquid containing dioxins and/or PCBs, and oxygen containing gas to a reactor in which catalyst exists, and conducting wet-oxidation reaction under liquid phase condition of the introduced liquid. According to the present invention, a simple method which can efficiently extract dioxins, PCBs and/or component containing them, from soil is provided, the method comprising: 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.