Insolubilizing agent for specific toxic substances, method for insolubilizing specific toxic substances using same, and soil improving method
US10850256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is an insolubilizing material for a specific toxic substance useful for insolubilizing a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil. The insolubilizing material, for a specific toxic substance, is used in a manner so that soil does not reach a strongly alkaline region of a pH of 11 or more. The insolubilizing material for a specific toxic substance comprises an amorphous aluminum compound or a derivative thereof as a main component. The insolubilizing material functions as a solidifying material. The insolubilizing material also comprises gypsum obtained by adding and mixing, to the gypsum, the amorphous aluminum compound or the derivative thereof in a range from 0.5 to 60 mass parts relative to 100 mass parts of the gypsum. A method for improving soil using the insolubilizing material is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.