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ACTIVELY FACILITATED PERMEABLE REACTIVE BARRIER FOR REMEDIATION OF TCE FROM A LOW PERMEABILITY AQUIFER: FIELD APPLICATION
Bekele, D.N., J. Du, L.G. de Freitas, M. Mallavarapu, S. Chadalavada, and R. Naidu.
Journal of Hydrogeology 572:592-602(2019).

Researchers developed a technique to remediate groundwater in a low-permeability and low water-bearing aquifer contaminated with TCE. The remediation technique introduced coupling of large-diameter permeable reactive barrier (PRB) wells with extraction wells in a highly impacted plume and re-injection wells at the fringe of the plume. The authors discuss approaches for coupling technologies to increase technical and economic feasibility. Extraction and reinjection wells of treated groundwater at the fringe of the plume promoted a positive hydraulic gradient, facilitated groundwater transport through the reactive media, and contained the plume. Detailed geospatial and statistical analysis with over 10?years' monitoring data showed that the dissolved TCE plume delineation shrank. Concentration continues to decline and is projected to meet the demands of remediation compliance regulations in the next few years.



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