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Activated hybrid zero-valent iron treatment system and methods for generation and use thereof
(United States. Patent and Trademark Office, 2021-08-10)
Activated iron media and methods for generating and using the activated iron media. The method involves aqueous suspension comprising a zero-valent iron, ferrous iron, and an iron oxide to provide a settled solid and ...
Selenium removal using aluminum salt at conditioning and reaction stages to activate zero-valent iron (ZVI) in pironox process
(United States. Patent and Trademark Office, 2021-12-28)
A system containing a reactor vessel including zero valent iron media, a source of a conditioning additive, a source of a reaction additive, and a process control subsystem is disclosed. A method for reducing a concentration ...
Mixed aluminum (III) and iron (II) salt solution for enhancing the hybrid zero-valent iron media system reactivity for treating metal contaminated wastewater
(United States. Patent and Trademark Office, 2021-05-04)
Methods for reducing the concentration of one or more contaminants in water using zero-valent iron media. In the method, a mixed aluminum (III) and iron (II) salt solution is added to water containing one or more contaminants ...
Methods for treating selenocyanate in wastewater
(United States. Patent and Trademark Office, 2022-02-01)
Methods and systems for reducing the concentration of selenocyanate in water. In the methods and systems, water containing selenocyanate is treated an oxidant to provide oxidant-treated water, which is then contacted with ...
Removal Of Selenocyanate From Refinery Sour Water Stripper Wastewater
(United States. Patent and Trademark Office, 6/21/2022)
Systems and methods for removing heavy metals such as selenium from wastewater with zero valent iron media. Air may be introduced directly into a reaction zone of a fluidized bed reactor filled with the media to catalyze ...
Method for removal of recalcitrant selenium species from wastewater
(United States. Patent and Trademark Office, 2021-08-10)
Methods and systems for reducing the concentration of selenium species in water, particularly water containing recalcitrant selenium species. In the methods and systems, water containing one or more selenium species is ...