Selenium removal from water
US7419602B2 · kind B2 · utility
2Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment to a pH value in the range of from about 6.5 to about 8.0, thereby forming a copper-and-selenium-containing precipitate, and 3) removing the copper-and-selenium-containing precipitate to thereby form a treated water stream, is disclosed. The optional precipitation and removal of excess copper ions is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.