| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a decontaminating agent for soil and ground water, of which particle size of an oil drop is small enough and which is excellent in diffusibility in soil and can be uniformly distributed in soil and ground water to achieve sufficient decontamination of a contaminant. Ž<P>SOLUTION: The decontaminating agent for soil and ground water decomposes the contaminant by activating microorganisms existing in either or both of contaminated soil and contaminated ground water. The decontaminating agent comprises oil-in-water type emulsion obtained by emulsifying liquid oil and fat, water and a surfactant of 0.3 to 10 wt.% of weight of the liquid oil and fat. A mean particle size of the oil drops is 1 to 3 μm. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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