US 12,186,787 B2
Controlled release adjunct for contaminant treatment
Lindsay Swearingen, Floyds Knob, IN (US); and Jason Swearingen, Floyds Knob, IN (US)
Assigned to Specialty Earth Sciences, LLC, New Albany, IN (US)
Filed by Specialty Earth Sciences, LLC, New Albany, IN (US)
Filed on Jan. 13, 2021, as Appl. No. 17/148,559.
Claims priority of provisional application 62/961,688, filed on Jan. 15, 2020.
Prior Publication US 2021/0213498 A1, Jul. 15, 2021
Int. Cl. B09C 1/08 (2006.01); B09C 1/00 (2006.01); C02F 1/70 (2023.01); C02F 11/00 (2006.01); C02F 103/06 (2006.01)
CPC B09C 1/08 (2013.01) [B09C 1/002 (2013.01); C02F 1/705 (2013.01); C02F 11/004 (2013.01); B09C 2101/00 (2013.01); C02F 2103/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A process for in situ treatment of contaminated soil(s), water, waste, sludge, wastewater, sediment, other contaminated matrix, or combination thereof, the process comprising the steps of:
applying a redox material to the contaminated matrix, or in a flow path of the contaminant, in a first permeable reactive barrier in the matrix;
applying an adjunct to the contaminated matrix, or in a flow path of the contaminant, in a second permeable reactive barrier in the matrix;
wherein the second permeable reactive barrier is up gradient from the first permeable reactive barrier and is void of the redox material;
wherein the adjunct is selected from the group consisting of chelating agents, ligands, and combinations thereof and is void of the redox material;
controlling the release of the adjunct into solution in the matrix over a period of time exceeding a period of time for the adjunct to flow through the first permeable reactive barrier having the redox material;
wherein the controlling the release of the adjunct is performed independently of the step of applying a redox material;
reducing the quantity of at least one contaminant in the contaminated soil(s), water, waste, sludge, wastewater, sediment, other contaminated matrix, or combination thereof with the redox material;
contributing to the treatment of the at least one contaminant in the contaminated soil(s), water, waste, sludge, wastewater, sediment, other contaminated matrix, or combination thereof, with the adjunct; and
wherein the contributing to the treatment comprises at least one of mitigating scaling of the redox material and mitigating permeability loss within the matrix.