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Hydrogeochemical Model Supporting the Remediation Strategy of a Highly Contaminated Industrial Site

1
Department of Earth Science, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
2
Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
*
Author to whom correspondence should be addressed.
Water 2019, 11(7), 1371; https://doi.org/10.3390/w11071371
Received: 19 May 2019 / Revised: 30 June 2019 / Accepted: 2 July 2019 / Published: 3 July 2019
(This article belongs to the Special Issue Groundwater and Soil Remediation)
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Abstract

Delineation and understanding the geology and the hydrogeology of a contaminated site, considering its chemical and its biological aspects, are fundamental requirements for successful environmental remediation. The aim of this research is to provide some evidence about the effectiveness of a hydrogeochemical geodatabase to facilitate the integrated management, representation and analysis of heterogeneous data, enabling the appropriate selection, design and optimization of an effective remediation strategy. This study investigates a new technology for the remediation of a dense non-aqueous phase liquid aged source zone, with the aim of enhancing in situ bioremediation by coupling groundwater circulation wells with a continuous production system of electron donors. The technology was verified through a pilot test carried out at an industrial site highly contaminated by chlorinated aliphatic hydrocarbons. The multidisciplinary conceptual model confirmed a complex hydrogeological situation, with the occurrence of active residual sources in low permeability layers. The pilot test results clearly demonstrate a significant mobilization of contaminants from the low permeability zone, and the possibility of favoring the in situ natural attenuation mechanisms based upon biological reductive dechlorination. Different information related to the hydrogeochemical sphere must be integrated and taken into consideration when developing a reliable remediation strategy for contaminated sites. View Full-Text
Keywords: three-dimensional (3D) hydrogeochemical model; geodatabase; remediation; pilot test; groundwater circulation well; in situ bioremediation three-dimensional (3D) hydrogeochemical model; geodatabase; remediation; pilot test; groundwater circulation well; in situ bioremediation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ciampi, P.; Esposito, C.; Petrangeli Papini, M. Hydrogeochemical Model Supporting the Remediation Strategy of a Highly Contaminated Industrial Site. Water 2019, 11, 1371.

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