HAZARDOUS SUBSTANCE-FIXING MATERIAL

摘要

A hazardous substance-fixing material capable of fixing heavy metals stably over a long period of time, which comprises as a main component at least one of substances being capable of hydrating obtained by heating a calcium sulfoaluminate hydrate or a calcium aluminate hydrate. A mixture of the at least one substance with one or more of quick lime, slaked lime, gypsum, water granulated blast furnace slag, portland cement, iron sulfate, sodium hydrosulfide, sodium sulfide, thiourea and calcium polysulfide is more preferred. The hazardous substance-fixing material can fix not only a heavy metal, but also an anion such as chromic ion, chloride ion or the like which has been difficult to fix by use of a conventional method.