TREATING MATERIAL FOR POLLUTED WATER, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

摘要

A treating material for treating a polluted water containing, as a hazardous substance, arsenic, lead, cadmium, antimony, uranium, phosphorus, fluorine or the like, which comprises an oxygen-containing iron compound carried on a material containing a silicic acid based fiber or a silicate based fiber; a method for producing the treating material which comprises contacting and reacting a silicate based fiber, such as rock wool, with an iron-containing acidic water; and a method for treating the polluted water witch comprises contacting the treating material with the polluted water. The treating material has a fine structure wherein the above oxygen-containing iron compound is attached in a sheath form on the surface of a fiber reduced in an alkali component and increased in a silicic acid component as compared to, for example, rock wool. The oxygen-containing iron compounds include schwertmannite, ferrihydrite, akaganeite, amorphous hydrous iron oxide and fired ferric sulfate.