Creation of an iron product for wastewater treatment
AssigneeU.S. Peroxide, LLC
InventorsAli Safarzadeh-Amiri, Zachary Bryan Scott, John Ray Walton, Vladimir Djukanovic
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Abstract
An embodiment provides a method for making a non-hazardous iron product for treating wastewater, including: adding sodium bisulfite to a solution comprising iron, creating an aqueous solution; adding an amount of sodium hydroxide to the aqueous solution to increase the pH of the aqueous solution to between 2-2.5; determining an amount of sodium bicarbonate and adding the identified amount of sodium bicarbonate to the aqueous solution, wherein the sodium bicarbonate adjusts the pH of the aqueous solution to a desired pH; and providing a buffer to the aqueous solution to generate a slurry. Other embodiments are described and claimed.
Claims18
A method of making an iron product, the method comprising:
- providing an aqueous solution comprising ferrous iron as at least one of ferrous chloride and ferrous sulfate, the aqueous solution comprising ferrous iron having a first pH;
- and
- adding carbonate or bicarbonate to the aqueous solution comprising ferrous iron to increase the pH of the aqueous solution to a desired pH to produce the iron product,
- wherein the iron product includes at least 5 weight % of iron content that consists primarily of Fe2+ and Fe(OH)2, and
- wherein the carbonate or bicarbonate is only added to the aqueous solution comprising ferrous iron when the aqueous solution has a pH of 0.8 or greater.
A method of making an iron product, comprising:
- providing an aqueous solution comprising iron and having a first pH;
- and
- adding a non-CO2 emitting alkali to the aqueous solution to increase the pH of the aqueous solution from the first pH to a second pH that is in a range of from 0.8 to 2,
- adding carbonate or bicarbonate to the aqueous solution to increase the pH of the aqueous solution from the second pH to a desired pH, the second pH being intermediate the first pH and the desired pH.
Dependencies are inferred from the claim text.