| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of being directly and easily applied to contaminated soil in various areas and by which heavy metals contained in sludge are also efficiently removed without causing a heavy economical burden. SOLUTION: A soil electrode 9 is arranged in the soil 2 contaminated by heavy metals, an induction electrode 8 sheathed with an adsorbent 7 is set adjacently to the soil 2, a complexing agent is mixed in the soil 2 to complex the heavy metals, then a potential difference is imparted between the soil electrode 9 and the induction electrode 8, and hence the complexed heavy metals in the soil 2 are moved toward the induction electrode 8 and collected by the adsorbent 7.
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