Iron composite particles, methods of producing the same and of purifying soil or ground water using the same

摘要

Iron composite particles for purifying soil or ground water, comprise ±-Fe and magnetite and have a ratio of a diffraction intensity D 110 of (110) plane of ±-Fe to a sum of a diffraction intensity D 311 of (311) plane of magnetite and the diffraction intensity D 110 (D 110 /(D 311 + D 110 )) of 0.30:1 to 0.95:1 as measured from X-ray diffraction spectrum of the iron composite particles, an Al content of 0.10 to 1.50% by weight and an S content of 3500 to 7000 ppm.