| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a soil cleaning agent, which can be manufactured by a simple method. <P>SOLUTION: A cleaning agent for ground water and soil polluted with a volatile organic halogen compound is a composite particle comprising iron (Fe), wustite (FeO), magnetite (Fe<SB>3</SB>O<SB>4</SB>), and hematite (Fe<SB>2</SB>O<SB>3</SB>), and is characterized in that the BET specific surface area is 0.5-5.0 m<SP>2</SP>/g, the ratio of the sum of peak intensities of wustite and magnetite to the total of peak intensities of iron, wustite, magnetite, and hematite in an X-ray diffraction spectrum is 0.4-1.0, and iron having a crystal grain size of 50μm or more is contained. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
