| 摘要 |
PROBLEM TO BE SOLVED: To separate and remove hardly decomposable hazardous materials, such as PCBs or PCDDs(polychlorinated-dibenzo-p-dioxins) and the like without impairing the characteristics of the soil contaminated by the hardly decomposable hazardous materials and to reuse the treated soil as the farming land. SOLUTION: The hardly decomposable hazardous materials are separated and removed by putting the contaminated soil into a distillation flask and adding water thereto, then subjecting the soil to steam distillation.
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