SOIL CLEANING METHOD

摘要

PROBLEM TO BE SOLVED: To improve the decomposition efficiency of organic matter in treating a soil for treatment containing organic matter with hydrogen peroxide in the presence of a catalyst which is a metal ion capable of attaining >=2 kinds of valences. SOLUTION: The soil cleaning method for decomposing organic matter by treating a soil for treatment containing organic matter with hydrogen peroxide in the presence of a catalyst which is a metal ion capable of attaining >=2 kinds of valences consists of adding an assistant capable of supplying at least either of the cation which is more easily adsorbable on the cation exchange seat of the soil for treatment as compared to the catalyst described above and the cation which produces a product by more easily reacting with phosphoric acid as compared with the catalysts described above to the soil prior to the treatment by hydrogen peroxide.