Cellulose nanocrystal-supported sodium alginate adsorbent
US11577220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2022 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Jun 21, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/28
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure discloses a cellulose nanocrystal-supported sodium alginate adsorbent and use thereof in enriching organic phosphorus in wastewater, belonging to the technical field of environmental engineering. Cellulose nanocrystals are prepared from papermaking deinking sludge through chemical conditioning, drying, crushing, chemical oxidation and microwave assisted separation, and then supported on alginate under weakly acidic conditions to provide the cellulose nanocrystals with the ability to enrich organic phosphorus in wastewater. By using this method, the content of organic phosphorus in the wastewater can be significantly reduced, the total phosphorus in the effluent can be reduced, and the wastewater treatment effluent can satisfy the discharge standard. The enriched organic phosphorus can be recycled as a phosphorus resource through incineration. In addition, the papermaking deinking sludge is made into the product with a high added value, so the applicability of the papermaking deinking sludge is broadened. The present disclosure has high feasibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.