Experimentation and Modeling Study of Multiphase Extraction at the Laboratory Pilot Scale
Publication: Journal of Environmental Engineering
Volume 149, Issue 6
Abstract
This work investigated the treatment of a heterogeneous soil by multiphase extraction (MPE), which is a physical remediation method for soils containing volatile organic compounds. Experiments were conducted on a two-dimensional (2D) laboratory pilot. The soil was simulated by sand in which one or two clay barriers were introduced. The pollutant used was -decane (concentration ) in hexane, acting as the solvant. The mixture of -decane in hexane was introduced in the soil, and the infiltration of the contaminant and its extraction were modeled and experimentally verified. The extraction time and the extraction yield were determined experimentally by monitoring the pollutant concentrations over time during treatment. The influence of barriers on the treatment time and on the adsorption in solid phase in both the vadose and the capillary zones was highlighted. The installation of a clay barrier increased the treatment time but produced an almost identical yield to that obtained with sand alone.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was carried out within the framework of the OPTIMEX project funded by ADEME (French Environment and Energy Management Agency).
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 149 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Aug 1, 2022
Accepted: Jan 12, 2023
Published online: Apr 7, 2023
Published in print: Jun 1, 2023
Discussion open until: Sep 7, 2023
ASCE Technical Topics:
- Business management
- Chemical properties
- Chemistry
- Clays
- Engineering fundamentals
- Environmental engineering
- Geomechanics
- Geotechnical engineering
- Heterogeneity
- Laboratory tests
- Mitigation and remediation
- Models (by type)
- Physical models
- Pollution
- Practice and Profession
- Scale models
- Soil mechanics
- Soil pollution
- Soil treatment
- Soils (by type)
- Tests (by type)
Authors
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