Contamination in low-permeability soils poses a significant technical
challenge to in situ remediation efforts, primarily due to poor access
ibility to the contaminants and difficulty in uniform delivery of trea
tment reagents. This paper discusses an integrated in situ remedial ap
proach in which electrokinetics is coupled with sorption/degradation i
n treatment zones that are installed directly in the contaminated soil
s. Called Lasagna due to the layered appearance of electrodes and trea
tment zones, the technology could conceptually treat organic and inorg
anic contamination as well as mixed wastes. Laboratory results obtaine
d with p-nitrophenol as a model organic contaminant in kaolinite suppo
rt the feasibility of the approach. Key operating characteristics of t
he process are discussed.