TREATING AGENT FOR HEAVY METAL-CONTAINING WASTE AND STABILIZING TREATMENT OF HEAVY METAL-CONTAINING WASTE

摘要

PROBLEM TO BE SOLVED: To stabilize the elution of heavy metal ions to a standard value or lower, to keep the stabilization effect on heavy metal ions and to completely prevent secondary pollution by incorporating a phosphorylated polymer which forms phosphoric acid ion in water. ;SOLUTION: The phosphorylated polymer used as the essential component of the treating agent has a phosphoric acid group which forms a phosphoric acid ion in water in the side chain and the polymer includes water-soluble and water-insoluble polymers. The phosphorylated polymer which is insoluble in water has a phosphoric acid ion on the molecular surface. If necessary, the treating agent contains an inorg. powder. In the treating method of a waste, during the treating agent above described, a waste containing heavy metals, and water as an arbitrary component are mixed and kneaded. or after mixed and kneaded, the kneaded material is heated to significantly improve the effect to suppress elution of heavy metals or to decrease the time for stabilization. The treated material thus obtd. is used as obtd. or, if necessary, pulverized and used as an aggregate for a cement concrete and an aggregate for paving material of road.;COPYRIGHT: (C)1999,JPO