title: Image analysis procedure for studying Back-Diffusion phenomena from low-permeability layers in laboratory tests.
abstract: In this study, the long-term tailing derived from the storage process of contaminants in low-permeability zones is investigated. The release from these areas in the groundwater can be considered a long-term source that often undermines remediation efforts. An Image Analysis technique is used to analyze the process and evaluate the concentrations of a tracer at different points of the test section. Furthermore, the diffusive flux from the low-permeability lenses is determined. To validate the proposed technique, the results are compared with samples, and the diffusive fluxes resulting from the low-permeability zones of the reconstructed aquifer are compared with a theoretical approach.
authors.affiliation: Department of Civil, Building and Environmental Engineering (DICEA), University of Rome "La Sapienza", Via Eudossiana 18, 00184, Rome, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Tatti
authors.affiliation: Department of Chemistry, University of Rome "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy.
authors.forename: Marco Petrangeli
authors.initials: MP
authors.lastname: Papini
authors.affiliation: School of Industrial Engineering, University LIUC-Cattaneo, Corso Matteotti 22, I-21053, Castellanza, VA, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Raboni
authors.affiliation: Department of Civil, Building and Environmental Engineering (DICEA), University of Rome "La Sapienza", Via Eudossiana 18, 00184, Rome, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Viotti