Treatment method for removing arsenic from arsenic contaminated water
US5358643A · kind A · utility
37Cited by
8References
12Claims
0Family size
Inventor
Key dates
| Filing date | Feb 8, 1994 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Feb 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/911
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A treatment method for removing arsenic from water includes conditioning the water with one more additives including an iron salt, an acid, and an oxidant until the water contains more ion than arsenic, is acidic, and has an ORP of about plus 600 mV. A reagent is then added to the conditioned water until it becomes basic and the water and additives are then reacted in a reaction chamber wherein iron and arsenic are co-precipitated in the form of iron arsenate and iron hydroxide or iron oxide. Treated water is then separated from the precipitate by settling of filtering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.