LIGHT ROCK, LIGHT GRAVEL OR LIGHT SAND HAVING DEODORIZING AND WATER CLEANING FUNCTION

摘要

PURPOSE: To obtain a light rock, a light gravel or a light sand (hereinafter referred to as a 'light gravel') having deodorizing and water-cleaning functions prepd. by utilizing effectively the porous light gravel formed from eruption of a volcano. ;CONSTITUTION: The title light gravel is constituted by inpregnating a porous light rock, light gravel or light sand formed from eruption of a volcano with an acidic additive wherein a lot of metal salts and non-metal salts obtd. by dissolving vermiculite derived from a weathered mica-type mineral in an inorg. acid water soln. are main ingredients.;COPYRIGHT: (C)1993,JPO&Japio