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US 10,329,179 B2Granted
Zero valent iron systems and methods for treatment of contaminated wastewater
AssigneeThe Texas A&M University System
InventorYongheng Huang
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Abstract
Hybrid zero-valent iron systems and methods for treating a fluid containing a contaminant that removes or reduces the concentration of contaminants, such as toxic metals, metalloids, oxyanions, and dissolved silica.
Claims21
A method of removing or reducing the concentration of a contaminant in wastewater, comprising:
- (a) contacting wastewater comprising a contaminant with a reactive solid, wherein the reactive solid comprises zero-valent iron and magnetite in contact therewith, and wherein the zero-valent iron from which the reactive solid is prepared has a particle size from about 10 μm to about 40 μm;
- (b) introducing an added secondary reagent to the wastewater in contact with the reactive solid, wherein the added secondary reagent is ferrous iron.
A method of removing or reducing the concentration of a contaminant in wastewater, comprising:
- (a) treating zero-valent iron with an oxidant and ferrous iron to provide a reactive solid comprising zero-valent iron and magnetite in contact therewith, wherein the zero-valent iron has a particle size from about 10 μm to about 40 μm;
- and
- (b) contacting wastewater comprising a contaminant with the reactive solid and an added secondary reagent, wherein the added secondary reagent is ferrous iron.
Dependencies are inferred from the claim text.