Selenium Remediation
Hepure’s zero valent iron products treat selenium contamination in groundwater through chemical reduction and co-precipitation with iron corrosion products.
About Selenium Contamination
Selenium contamination in groundwater is associated with mining (particularly coal mining), oil refining, agricultural drainage, and certain natural geological formations. Selenium exists in multiple oxidation states in the environment, with selenate (Se⁶⁺) and selenite (Se⁴⁺) being the most common anionic forms in aqueous systems. Elevated selenium can be toxic to aquatic life and livestock and is subject to regulatory standards for both drinking water and ecological protection.
ZVI Treatment
Zero valent iron is effective for selenium treatment through reduction of soluble selenate and selenite species to insoluble elemental selenium (Se⁰) or selenide forms. Selenium is among the inorganic compounds Hepure’s Ferox ZVI products are documented to treat.
Biological Reduction
Under anaerobic conditions, native microorganisms can reduce selenium species biologically. Hepure’s emulsified vegetable oil (EVO) provides the electron donor required to establish and sustain these reducing conditions in the subsurface. This approach is often used at coal mining sites with selenium-impacted groundwater.
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