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| | Abstract | | In recent years, a stable supply of resources is one of the most important economical factors in Japan. Discarded electrical appliances contain various kinds of useful metal. However, solid wastes had dumped into landfills without intermediate treatment until Fundamental Law for Establishing a Recycling Based Society was enacted in 1998. Therefore, it is expected that metals are comparatively rich in such a landfill. We examined the contents, the change of property, and the movement of moisture in landfills. As a result, the concentrations of valuable metals were clarified. In order to identify metal-enriched zones in landfills, a non-destructive three-dimensional prospecting system that employs resistivity and induced polarization measurements was developed. |
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