Method for simultaneous removal of arsenic and fluoride from aqueous solutions
US6613230B2 · kind B2 · utility
49Cited by
10References
17Claims
0Family size
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Key dates
| Filing date | Jun 27, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Jun 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/915
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of removing arsenic and fluoride from aqueous solutions in the same process is provided. Specifically, the pH of the aqueous solution is adjusted to a pH in the range of about 5 to 8. A combination of calcium salts, and ferric or aluminum salts are added to form insoluble arsenic and fluoride bearing solids. The solids are then removed from the aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.