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Coupled Hydrogeochemical Approach and Sustainable Technologies for the Remediation of a Chlorinated Solvent Plume in an Urban Area

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  • Paolo Ciampi

    (Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
    CERI Research Center, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy)

  • Carlo Esposito

    (Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
    CERI Research Center, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy)

  • Ernst Bartsch

    (IEG Technologie GmbH, Hohlbachweg 2, D-73344 Gruibingen, Baden-Württemberg, Germany)

  • Eduard J. Alesi

    (IEG Technologie GmbH, Hohlbachweg 2, D-73344 Gruibingen, Baden-Württemberg, Germany)

  • Christian Nielsen

    (TAUW Italia, Piazza Leonardo da Vinci 7, 20133 Milano, Italy)

  • Laura Ledda

    (TAUW Italia, Piazza Leonardo da Vinci 7, 20133 Milano, Italy)

  • Laura Lorini

    (Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy)

  • Marco Petrangeli Papini

    (CERI Research Center, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
    Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy)

Abstract

The presence of chlorinated solvents polluting groundwater in urbanized areas poses a significant environmental issue. This paper details a thoughtful approach to remediate a tetrachloroethylene (PCE) plume in a district that is characterized by a complex hydrological context with a limited accessibility. Through a geodatabase-driven and coupled hydrogeochemical approach, two distinct remediation technologies were chosen for the management of a contaminant plume. On one hand, coaxial groundwater circulation (CGC) wells coupled with air sparging (AS) aspire to promote the in-situ transfer of PCE from the contaminated matrices into a gaseous stream that is then treated above ground. On the other hand, reagent injection has the goal of enhancing chemical reduction combined with in situ adsorption, creating contaminant adsorbent zones, and stimulating dechlorinating biological activity. The development of an integrated conceptual site model (CSM) harmonizing geological, hydrochemical, and membrane interface probe (MIP) data captures site-specific hydrogeochemical peculiarities to support decision-making. The hydrochemical monitoring reveals contamination dynamics and decontamination mechanisms in response to treatment, quantifying the performance of the adopted strategies and investigating possible rebound effects. The estimation of masses extracted by the CGC-AS system validates the effectiveness of a new and sustainable technique to abate chlorinated solvents in groundwater.

Suggested Citation

  • Paolo Ciampi & Carlo Esposito & Ernst Bartsch & Eduard J. Alesi & Christian Nielsen & Laura Ledda & Laura Lorini & Marco Petrangeli Papini, 2022. "Coupled Hydrogeochemical Approach and Sustainable Technologies for the Remediation of a Chlorinated Solvent Plume in an Urban Area," Sustainability, MDPI, vol. 14(16), pages 1-20, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:16:p:10317-:d:892277
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    References listed on IDEAS

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    1. Jianzhong He & Kirsti M. Ritalahti & Kun-Lin Yang & Stephen S. Koenigsberg & Frank E. Löffler, 2003. "Detoxification of vinyl chloride to ethene coupled to growth of an anaerobic bacterium," Nature, Nature, vol. 424(6944), pages 62-65, July.
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    Cited by:

    1. Abhay Guleria & Pankaj Kumar Gupta & Sumedha Chakma & Brijesh Kumar Yadav, 2023. "Unraveling the Fate and Transport of DNAPLs in Heterogeneous Aquifer Systems—A Critical Review and Bibliometric Analysis," Sustainability, MDPI, vol. 15(10), pages 1-20, May.

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