| 摘要 |
PROBLEM TO BE SOLVED: To stabilize elution of heavy metal ions to the standard value or lower by adding and mixing a treating agent containing a latent hydraulic material and water-contg. aluminosilicate to a waste material containing heavy metals, and if necessary, adding water, kneading and then heat treating the mixture. SOLUTION: The stabilizing treating agent for heavy metals comprising a latent hydraulic material contains water-contg. aluminosilicate as the essential component. The basic structural unit of the water-contg. aluminosilicate is a SiO4 (AlO4 ) tetrahedron having Si or/and Al as the center, and the units are arranged into a three-dimensional mesh structure to form a crystal unit. In the stabilizing method of a waste containing heavy metals, a waste containing heavy metals is mixed and kneaded with the treating agent, and if necessary with water. The heat treatment is carried out by using the heat generated in the kneading process, or the kneaded material after kneading may be heated as it is or while kneading. The heating temp. is >=40 deg.C, preferably >=50 deg.C. |
