Ferrous modified selenium sol for inhibiting accumulation of cadmium and arsenic in rice and preparation method and application thereof
US10899631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2020 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Apr 30, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G5/23
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ferrous modified selenium sol for inhibiting accumulation of cadmium and arsenic in rice and the preparation method and application thereof are disclosed. The method includes: dissolving an iron-containing compound and a selenium-containing compound into water; adding a reductant to the solution, and stirring until no more precipitation is generated, then adding carbonate, continuing to stir until no more precipitation is generated, and then filtering, taking the precipitation, and washing to obtain the precipitation of the selenium element and ferrous carbonate; adding an emulsifier to a citric acid buffer solution to obtain an emulsified citric acid buffer solution; adding the precipitation of the selenium element and ferrous carbonate to the emulsified citric acid buffer solution to obtain a sol system; and evaporating to concentrate the sol system, and adjusting the pH to 4.5-8.5 to obtain a ferrous modified selenium sol for inhibiting the accumulation of cadmium and arsenic in rice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.