| abstract |
(57) [Abstract] [PROBLEMS] To expand the field of use of the properties of natural graphite silica, in particular, to expand its function as a water purifier, and also to use natural aluminosilicates such as shirasu Use glass. SOLUTION: This is a purifying agent comprising a porous granular material of a mixed powder of a graphite silica powder and an aluminosilicate glass powder, the mixed powder of a graphite silica powder and an aluminosilicate glass powder, Such a natural component is blended and calcined in a reducing atmosphere to form a porous spherical particle. |