Auxin-enhanced phytoremediation process for removal of metal contaminants from polluted soil and fly ash from coal
US11097322B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 8, 2019 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Nov 7, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The phytoremediation process for removing hazardous metals, such as Be, Cr, Co, Mn, and Ra, from contaminated soil and/or coal fly ash, e.g. in a landfill, includes growing plants in the soil and/or fly ash; incorporating a root growth inducing auxin in the soil and/or fly ash in the vicinity of the growing plants and subsequently cultivating the plants until a predetermined increase in root mass of the plant roots has occurred. The preferred auxin is 3-4-deoxy-glucosamine, which was found to increase plant root mass by 200% to 800%. An organic synthesis using glucosamine as starting material or a bioengineering process starting with commercial micronized shrimp meal and/or crab meal moistened with water can provide the 3-4-deoxy-glucosamine. Economical embodiments of the process use plants that produce marketable products and recovers valuable metals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.