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Remediation of Residual NAPL from Aquifers by Permeability Modification: A Review
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 037032, 2003 ASAE Annual Meeting . (doi: 10.13031/2013.14235) @2003
Authors: Neil John D’Cunha, Debasmita Misra, David L. Barnes, Gang Chen
Keywords: Remediation, NAPL, Permeability Modification, Biopolymers, Cold regions
Organics become trapped as non-aqueous phase liquids (NAPL) in the subsurface matrix
and serve as a source for continuous dissolution of contamination. Organics can remain in significant
quantities as residual contaminants even after the bulk phase has been removed. A combination of
the aquifer properties and the characteristics of the drive fluid are responsible for these conditions.
As the drive fluid sweeps through the aquifer it follows the path of least resistance, which is the high
permeability zone. Thus the contaminants trapped in the low permeability zones remain as residuals
and serve as a source for prolonged contamination. In this paper, we will present a review of the
various techniques that are employed for remediation of residual contaminants.