| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and structure of clarifying contaminated groundwater by which the contaminated groundwater containing fluorine, heavy metals or organic chlorine compounds can be clarified with a simple means in situ while reducing affect on the surroundings. SOLUTION: The contaminated groundwater is allowed to pass through a reaction layer 21, a fluorine adsorption layer 22 and a pH adjusting layer 23 in this order. The passing order of the reaction layer 21 and fluorine adsorption layer 22 may be reversely set. In this case, the groundwater is allowed to pass through the fluorine adsorption layer 22, the pH adjusting layer 23, then the reaction layer 21. The reaction layer 21 contains iron powder, the fluorine adsorption layer 22 contains magnesium oxide particles or the like, and the pH adjusting layer 23 contains acid clay particles or the like. COPYRIGHT: (C)2008,JPO&INPIT
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