A Screening Model to Predict Entrapped LNAPL Depletion
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3390/w12020334 http://hdl.handle.net/11449/196689 |
Resumo: | Accidental leakage of hydrocarbons is a common subsurface contamination scenario. Once released, the hydrocarbons migrate until they reach the vicinity of the uppermost portion of the saturated zone, where it accumulates. Whenever the amplitude of the water table fluctuation is high, the light non-aqueous phase liquid (LNAPL) may be completely entrapped in the saturated zone. The entrapped LNAPL, comprised of multicomponent products (e.g., gasoline, jet fuel, diesel), is responsible for the release of benzene, toluene, ethylbenzene, and xylenes (BTEX) into the water, thus generating the dissolved phase plumes of these compounds. In order to estimate the time required for source-zone depletion, we developed an algorithm that calculates the mass loss of BTEX compounds in LNAPL over time. The simulations performed with our algorithm provided results akin to those observed in the field and demonstrated that the depletion rate will be more pronounced in regions with high LNAPL saturation. Further, the LNAPL depletion rate is mostly controlled by flow rate and is less sensible to the biodegradation rate in the aqueous phase. |
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Repositório Institucional da UNESP |
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A Screening Model to Predict Entrapped LNAPL DepletionLNAPL depletiondissolved plumes of BTEX compoundsjet fuelnumerical simulation of contaminant transportAccidental leakage of hydrocarbons is a common subsurface contamination scenario. Once released, the hydrocarbons migrate until they reach the vicinity of the uppermost portion of the saturated zone, where it accumulates. Whenever the amplitude of the water table fluctuation is high, the light non-aqueous phase liquid (LNAPL) may be completely entrapped in the saturated zone. The entrapped LNAPL, comprised of multicomponent products (e.g., gasoline, jet fuel, diesel), is responsible for the release of benzene, toluene, ethylbenzene, and xylenes (BTEX) into the water, thus generating the dissolved phase plumes of these compounds. In order to estimate the time required for source-zone depletion, we developed an algorithm that calculates the mass loss of BTEX compounds in LNAPL over time. The simulations performed with our algorithm provided results akin to those observed in the field and demonstrated that the depletion rate will be more pronounced in regions with high LNAPL saturation. Further, the LNAPL depletion rate is mostly controlled by flow rate and is less sensible to the biodegradation rate in the aqueous phase.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Sao Paulo State Univ, CEA, BR-13506900 Sao Paulo, BrazilSao Paulo State Univ, Dept Appl Geol, BR-13506900 Sao Paulo, BrazilSao Paulo State Univ, CEA, BR-13506900 Sao Paulo, BrazilSao Paulo State Univ, Dept Appl Geol, BR-13506900 Sao Paulo, BrazilMdpiUniversidade Estadual Paulista (Unesp)Teramoto, Elias Hideo [UNESP]Chang, Hung Kiang [UNESP]2020-12-10T19:53:06Z2020-12-10T19:53:06Z2020-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article14http://dx.doi.org/10.3390/w12020334Water. Basel: Mdpi, v. 12, n. 2, 14 p., 2020.http://hdl.handle.net/11449/19668910.3390/w12020334WOS:0005198465000251989662459244838Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengWaterinfo:eu-repo/semantics/openAccess2021-10-23T09:20:10Zoai:repositorio.unesp.br:11449/196689Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:15:13.649728Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A Screening Model to Predict Entrapped LNAPL Depletion |
title |
A Screening Model to Predict Entrapped LNAPL Depletion |
spellingShingle |
A Screening Model to Predict Entrapped LNAPL Depletion Teramoto, Elias Hideo [UNESP] LNAPL depletion dissolved plumes of BTEX compounds jet fuel numerical simulation of contaminant transport |
title_short |
A Screening Model to Predict Entrapped LNAPL Depletion |
title_full |
A Screening Model to Predict Entrapped LNAPL Depletion |
title_fullStr |
A Screening Model to Predict Entrapped LNAPL Depletion |
title_full_unstemmed |
A Screening Model to Predict Entrapped LNAPL Depletion |
title_sort |
A Screening Model to Predict Entrapped LNAPL Depletion |
author |
Teramoto, Elias Hideo [UNESP] |
author_facet |
Teramoto, Elias Hideo [UNESP] Chang, Hung Kiang [UNESP] |
author_role |
author |
author2 |
Chang, Hung Kiang [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Teramoto, Elias Hideo [UNESP] Chang, Hung Kiang [UNESP] |
dc.subject.por.fl_str_mv |
LNAPL depletion dissolved plumes of BTEX compounds jet fuel numerical simulation of contaminant transport |
topic |
LNAPL depletion dissolved plumes of BTEX compounds jet fuel numerical simulation of contaminant transport |
description |
Accidental leakage of hydrocarbons is a common subsurface contamination scenario. Once released, the hydrocarbons migrate until they reach the vicinity of the uppermost portion of the saturated zone, where it accumulates. Whenever the amplitude of the water table fluctuation is high, the light non-aqueous phase liquid (LNAPL) may be completely entrapped in the saturated zone. The entrapped LNAPL, comprised of multicomponent products (e.g., gasoline, jet fuel, diesel), is responsible for the release of benzene, toluene, ethylbenzene, and xylenes (BTEX) into the water, thus generating the dissolved phase plumes of these compounds. In order to estimate the time required for source-zone depletion, we developed an algorithm that calculates the mass loss of BTEX compounds in LNAPL over time. The simulations performed with our algorithm provided results akin to those observed in the field and demonstrated that the depletion rate will be more pronounced in regions with high LNAPL saturation. Further, the LNAPL depletion rate is mostly controlled by flow rate and is less sensible to the biodegradation rate in the aqueous phase. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T19:53:06Z 2020-12-10T19:53:06Z 2020-02-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3390/w12020334 Water. Basel: Mdpi, v. 12, n. 2, 14 p., 2020. http://hdl.handle.net/11449/196689 10.3390/w12020334 WOS:000519846500025 1989662459244838 |
url |
http://dx.doi.org/10.3390/w12020334 http://hdl.handle.net/11449/196689 |
identifier_str_mv |
Water. Basel: Mdpi, v. 12, n. 2, 14 p., 2020. 10.3390/w12020334 WOS:000519846500025 1989662459244838 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Water |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
14 |
dc.publisher.none.fl_str_mv |
Mdpi |
publisher.none.fl_str_mv |
Mdpi |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128911618342912 |