Detoxification treatment method of contaminated materials to organochlorine hazardous substances

摘要

This invention provides a method for treating a material contaminated with a hazardous substance which comprises drying the material to be treated, such as incineration ash, fly ash from a dust collector, collected dust, or soil contaminated with dioxins, or soil contaminated with polychlorinated biphenyl, admixing the dried material with at least one of calcium oxide and a material containing calcium oxide, and subjecting the resultant mixture to a mechanochemical treatment. A product formed by the above treatments can be solidified by a process comprising admixing the product with an inorganic powder capable of forming a hydrate, and the resultant solid product can be used as a material in civil engineering work, construction or the like.