Hydrodynamic Decontamination of Groundwater and Soils Using ZVI
Open Access
- 29 January 2023
- Vol. 15 (3), 540
- https://doi.org/10.3390/w15030540
Abstract
Polluted aquifers can be decontaminated using either ZVI (zero valent iron) permeable reactive barriers (PRB) or injected ZVI. The placement of ZVI within the aquifer may take several decades to remediate the contaminant plume. Remediation is further complicated by ZVI acting as an adsorbent to remove some pollutants, while for other pollutants, it acts as a remediation catalyst. This study investigates an alternative aquifer decontamination approach to PRB construction or n-Fe0 injection. The alternative approach reconstructs the potentiometric surface of the aquifer containing the contaminant. This reconstruction confines the contaminant plume to a stationary, doughnut shaped hydrodynamic mound. Contaminated water from the mound is abstracted, decontaminated, and then reinjected, until all the water confined within the mound is decontaminated. At this point, the decontaminated mound is allowed to dissipate into the surrounding aquifer. This approach is evaluated for potential use in treating the following: (i) immiscible liquid plumes; (ii) miscible contaminant and ionic solute plumes; (iii) naturally contaminated aquifers and soils; and (iv) contaminated or salinized soils. The results indicate that this approach, when compared with the PRB or injection approach, may accelerate the decontamination, while reducing the overall amount of ZVI required.This publication has 209 references indexed in Scilit:
- Dual‐permeability model for flow in shrinking soil with dominant horizontal deformationWater Resources Research, 2012
- Modification of Aquifer Pore-Water by Static Diffusion Using Nano-Zero-Valent MetalsWater, 2011
- Sustainable Zero-Valent Metal (ZVM) Water Treatment Associated with Diffusion, Infiltration, Abstraction, and RecirculationSustainability, 2010
- Fischer-Tropsch synthesis by nano-structured iron catalystJournal of Natural Gas Chemistry, 2010
- Formation and Control of Self-Sealing High Permeability Groundwater Mounds in Impermeable Sediment: Implications for SUDS and Sustainable Pressure Mound ManagementSustainability, 2009
- Surfactants for ground water remediationColloids and Surfaces A: Physicochemical and Engineering Aspects, 1999
- Dynamics of groundwater mounds: analytical solutions and integral characteristicsHydrological Sciences Journal, 1997
- Dynamic poroelastic soil column and borehole problem analysisSoil Dynamics and Earthquake Engineering, 1992
- Viscosity Studies on the Behavior of Inorganic Iron Polymers in Aqueous SolutionJournal of the American Chemical Society, 1966
- The Hydrolytic Polymerization of Iron(III)Journal of the American Chemical Society, 1966