Method for removing contaminant trace species, especially arsenic, from water
US7947183B2 · kind B2 · utility
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Key dates
| Filing date | May 11, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jan 9, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/911
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and a device for purifying water from contaminant trace species, especially arsenic, by co-precipitating trace species during oxidation and precipitation of iron compounds with subsequent separation. The co-precipitation is improved by contacting the water with an iron-containing material prior to oxidation to increase the iron content of the water. Arsenic and other trace species harmful to health may be removed from water effectively and in a simple manner, thus being able to comply with the more restrictive limits of arsenic in drinking water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.