| 摘要 |
PROBLEM TO BE SOLVED: To easily remove mercury from soil by mixing an additive into soil containing a mercury compound and heating the soil at a temperature below the boiling point of the mercury compound. SOLUTION: In the treatment of soil polluted by a mercury compound such as mercury sulfide, the soil is added with an additive and heated at a temperature below the boiling point of the mercury compound, e.g. 200-300 deg.C. In this treatment, when silica (silicon dioxide, SiO2 )is not contained in the polluted soil, or the content is low, silica such as a silica mineral is mixed into the soil. Transition metals, magnesium, calcium, zinc, aluminum and the compounds of these metals are used as the additive. Iron, nickel, and manganese are named as the transition metals. Chloride is preferable as the compound. An experiment for removing a mercury compound was carried out with an experimental apparatus equipped with a heat reaction vessel 10, a mercury vapor washing bottle 12, an absorption reactor 13, an active carbon adsorption column 14, etc.
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