| abstract |
The present invention provides an insolubilization material of specific harmful substances, which is useful in insolubilization treatment of heavy metals, etc., applied to soil or soil surface, and can effectively insolubilize heavy metals, etc., fix them, and reuse them. , Environmentally friendly neutral material, in addition, strength can be given according to needs, even if the treated material is exposed to neutral conditions or acidic conditions, heavy metals, etc. will not be eluted again, high practical value, and excellent economical efficiency. An insoluble material of a specific harmful substance, which is used for soil in a state that does not become a strongly alkaline range of pH 11 or higher, and uses an amorphous aluminum compound or a derivative thereof as a main component; or a specific harmful substance The insolubilizing material, which also functions as a solidifying material containing gypsum, which is used for soil containing heavy metals and the like in a state that does not become a strongly alkaline range of pH 11 or more, and the gypsum is 0.5 to 100 parts by mass of gypsum. Adding and mixing an amorphous aluminum compound or a derivative thereof in a range of 60 parts by mass; and a soil improvement method using insoluble materials of these specific harmful substances. |