3D numerical modelling of a pulsed pumping process of a large DNAPL pool: In situ pilot-scale case study of hexachlorobutadiene in a keyed enclosure
| Autor: | Quentin Giraud, Antoine Joubert, David Cazaux, Benoît Paris, Julio Gonçalvès, Stéfan Colombano |
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| Přispěvatelé: | Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Serpol, SERPOL, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Solvay (France), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Environmental remediation
0208 environmental biotechnology Enclosure 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Butadienes Environmental Chemistry [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology Groundwater ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Water Science and Technology Finite volume method Petroleum engineering Multiphase flow Models Theoretical 6. Clean water 020801 environmental engineering Hexachlorobutadiene Volume (thermodynamics) chemistry 13. Climate action Scientific method Environmental science Porous medium Water Pollutants Chemical |
| Zdroj: | Journal of Contaminant Hydrology Journal of Contaminant Hydrology, Elsevier, 2018, ⟨10.1016/j.jconhyd.2018.05.005⟩ Journal of Contaminant Hydrology, 2018, ⟨10.1016/j.jconhyd.2018.05.005⟩ |
| ISSN: | 0169-7722 |
| Popis: | Remediation of dense non-aqueous phase liquids (DNAPLs) represents a challenging issue because of their persistent behaviour in the environment. This pilot-scale study investigates, by means of in situ experiments and numerical modelling, the feasibility of the pulsed pumping process of a large amount of a DNAPL in an alluvial aquifer. The main compound of the DNAPL is hexachlorobutadiene (HCBD), added in 2015 to the persistent organic pollutants list (POP). A low-permeability keyed enclosure was built at the location of the DNAPL source zone in order to isolate a finite volume of soil and a 3-month pulsed pumping process was applied inside the enclosure to exclusively extract the DNAPL. The water/DNAPL interface elevation at both the pumping well and an observation well was recorded. The cumulated pumped volume of DNAPL was also monitored. A total volume of about 20 m3 of pure DNAPL was recovered since no water was extracted during the process. The three-dimensional and multiphase flow simulator TMVOC was used and a conceptual model was elaborated and generated with the pre/post-processing tool mView. Numerical simulations reproduce the pulsed pumping process and show an excellent match between simulated and field data of DNAPL cumulated pumped volume and a reasonable agreement between modelled and observed data for the evolution of the water/DNAPL interface elevations at the two wells. This study offers a new perspective in remediation since DNAPL pumping system optimisation may be performed where a large amount of DNAPL is encountered. |
| Databáze: | OpenAIRE |
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