Floatable hollow microsphere material, and preparation method and use in soil cadmium reduction thereof
US12427498B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2024 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | May 31, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are a floatable three-dimensional (3D) hollow microsphere material, and its preparation method and use in soil cadmium reduction, belonging to the field of regeneration of contaminated soil. The preparation method includes: mixing polyvinyl alcohol, sodium alginate, ethylenediaminetetraacetic acid, saponin, and at least one of modified rectorite and unmodified rectorite, to obtain a mixed material, wherein the modified rectorite includes at least one of formamide-modified rectorite and sodium humate-modified rectorite; and mixing the mixed material with a cross-linking agent solution, and performing cross-linking on a resulting mixture to obtain the floatable 3D hollow microsphere material. The floatable 3D hollow microsphere material is applied to moist soil to adsorb and remove heavy metal elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.