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A numerical model of the soil flushing remediation in heavy metal contaminated soil

TitoloA numerical model of the soil flushing remediation in heavy metal contaminated soil
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2013
AutoriAntonucci, A., Viotti P., Luciano Antonella, and Mancini G.
RivistaChemical Engineering Transactions
Volume32
Paginazione469-474
ISSN22839216
Parole chiaveChelation, Contaminated soils, Environmental impact, First order reactions, Flow and transport, Geologic models, Heavy metal contaminated soils, Heavy metals, Metal mobilizations, Non-stationary condition, Numerical models, Operating parameters, remediation, Soil pollution, Soils, Treatment efficiency
Abstract

This paper presents a 1D numerical model developed to simulate the EDTA chelation process of metal (lead) applied to a soil flushing remediation action. The model considers the non-stationary conditions, typical of unsaturated soil. Flow and transport equations are solved simultaneously. Metal mobilization is evaluated considering both the chemical aspects of chelating agents and the characteristics of the different soil fraction at which the metal can be bound. A system of first order reactions is implemented and, for each fraction, two different mobilization kinetics (slow and fast) are considered. The model was calibrated and validated using laboratory experimental data. Results confirm that the model can represent an evaluable tool to assess the feasibility of soil flushing application for heavy metals contaminated soil, especially in the case of surface layer contamination. It is useful to optimize the operating parameters (chelating dosage, application mode and treatment thickness) in order to achieve the maximum treatment efficiency while minimizing potential environmental impacts. Copyright © 2013, AIDIC Servizi S.r.l.

Note

cited By 3

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84879198463&doi=10.3303%2fCET1332079&partnerID=40&md5=8d86cb52bf5f16ff0f41a645c298d35c
DOI10.3303/CET1332079
Citation KeyAntonucci2013469