Method of removing arsenic and other anionic contaminants from contaminated water using enhanced coagulation
US7138063B1 · kind B1 · utility
11Cited by
13References
11Claims
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Key dates
| Filing date | Feb 10, 2006 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Feb 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/915
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An improved water decontamination process comprising contacting water containing anionic contaminants with an enhanced coagulant to form an enhanced floc, which more efficiently binds anionic species (e.g., arsenate, arsenite, chromate, fluoride, selenate, and borate, and combinations thereof) predominantly through the formation of surface complexes. The enhanced coagulant comprises a trivalent metal cation coagulant (e.g., ferric chloride or aluminum sulfate) mixed with a divalent metal cation modifier (e.g., copper sulfate or zinc sulfate).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.