| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and reliably purify material contaminated by a chemical substance, in particular, soil, bottom material and sludge, etc., contaminated by an organic chlorine compound in a short period. SOLUTION: The contaminated soil 2 is dug and is transferred to a two-shaft mixer 4. Subsequently, iron powder 6 is added to the contaminated soil in the two-shaft mixer and the contaminated soil and the iron powder are uniformly stirred and mixed by the two-shaft mixer. Further, a mixed solution 8 of hydrogen peroxide water and sulfuric acid is added to the contaminated soil which is added with the iron powder and the contaminated soil and the mixed solution are uniformly stirred and mixed by the double shaft mixer. Then, after performing the stirring for a fixed period, the contaminated soil is purified. |
