Process for removing oxidants from water injected into a subsurface aquifer to prevent mobilization of trace metals
US8574441B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Dec 22, 2009 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Mar 20, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for providing for the use of underground aquifers for water storage for municipalities or recharge. Water is treated and injected for storage in the aquifer by the addition of a small amount of a sulfide compound to remove dissolved oxygen and prevent dissolution of negative valence sulfur bearing minerals, such as pyrite, in the subsurface. The stored water may be subsequently withdrawn from the aquifer and treated to remove residual amounts of sulfide ions. The withdrawn water being suitable as potable water, irrigation water, industrial use water, and aquifer water level enhancement water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.