PoplarV1, Main, Exploration, bibRecord, 003862

Modeling the mechanisms for uptake and translocation of dioxane in a soil-plant ecosystem with STELLA.

Identifieur interne : 003862 ( Main/Exploration ); précédent : 003861; suivant : 003863

Modeling the mechanisms for uptake and translocation of dioxane in a soil-plant ecosystem with STELLA.

Auteurs : Ying Ouyang [États-Unis]

Source :

Journal of contaminant hydrology [ 0169-7722 ] ; 2008.

RBID : pubmed:17870205

Descripteurs français

KwdFr :
- Dioxanes (analyse), Dioxanes (métabolisme), Logiciel (MeSH), Modèles biologiques (MeSH), Phénomènes physiologiques des plantes (MeSH), Plantes (composition chimique), Plantes (métabolisme), Polluants du sol (analyse), Polluants du sol (métabolisme), Populus (composition chimique), Populus (métabolisme), Simulation numérique (MeSH), Sol (analyse), Transpiration des plantes (MeSH), Transport biologique (MeSH), Écosystème (MeSH).
MESH :
- analyse : Dioxanes, Polluants du sol, Sol.
- composition chimique : Plantes, Populus.
- métabolisme : Dioxanes, Plantes, Polluants du sol, Populus.
- Logiciel, Modèles biologiques, Phénomènes physiologiques des plantes, Simulation numérique, Transpiration des plantes, Transport biologique, Écosystème.

English descriptors

KwdEn :
- Biological Transport (MeSH), Computer Simulation (MeSH), Dioxanes (analysis), Dioxanes (metabolism), Ecosystem (MeSH), Models, Biological (MeSH), Plant Physiological Phenomena (MeSH), Plant Transpiration (MeSH), Plants (chemistry), Plants (metabolism), Populus (chemistry), Populus (metabolism), Software (MeSH), Soil (analysis), Soil Pollutants (analysis), Soil Pollutants (metabolism).
MESH :
- chemical , analysis : Dioxanes, Soil, Soil Pollutants.
- chemical , metabolism : Dioxanes, Soil Pollutants.
- chemistry : Plants, Populus.
- metabolism : Plants, Populus.
- Biological Transport, Computer Simulation, Ecosystem, Models, Biological, Plant Physiological Phenomena, Plant Transpiration, Software.

Abstract

Knowledge of mechanisms for uptake, translocation, and accumulation of soil contaminants in plants is essential to successful applications of the phytoremediation technique. Analysis and evaluation of these mechanisms would be greatly facilitated by the availability of a dynamic model that can predict soil contaminant uptake by roots, transport from roots through stems to leaves, and accumulation in plant during the transport process. In this study, a dynamic model for uptake and translocation of contaminants from a soil-plant ecosystem (UTCSP) was developed using the STELLA modeling tool. The structure of UTCSP consists of time-dependent simultaneous upward transport, accumulation, and transpiration of water and contaminants in the soil-plant-atmosphere continuum, which was driven by water potential gradients among soils, roots, stems, leaves, and atmosphere. The UTCSP model was calibrated using the experimental measurements and applied to predict phytoremediation of 1,4-dioxane from a sandy soil by a poplar tree. Simulation results showed that about 20% of 1,4-dioxane was removed from the soil by the poplar tree in 90 days. The simulations further revealed that while the mass of 1,4-dioxane in the poplar tree increased consecutively with time, the rates of water and 1,4-dioxane uptake and translocation in the roots, stems, and leaves have a typical diurnal distribution pattern: increasing during the day and decreasing during the night, resulting from daily variations of plant water potentials that were caused by leaf water transpiration. This study suggests that the UTCSP model is a useful tool for estimating phytoremediation of contaminants in the soil-plant ecosystems.

DOI: 10.1016/j.jconhyd.2007.07.010
PubMed: 17870205

Affiliations:

États-Unis

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Le document en format XML

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<term>Ecosystem (MeSH)</term>
<term>Models, Biological (MeSH)</term>
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<term>Modèles biologiques</term>
<term>Phénomènes physiologiques des plantes</term>
<term>Simulation numérique</term>
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<front><div type="abstract" xml:lang="en">Knowledge of mechanisms for uptake, translocation, and accumulation of soil contaminants in plants is essential to successful applications of the phytoremediation technique. Analysis and evaluation of these mechanisms would be greatly facilitated by the availability of a dynamic model that can predict soil contaminant uptake by roots, transport from roots through stems to leaves, and accumulation in plant during the transport process. In this study, a dynamic model for uptake and translocation of contaminants from a soil-plant ecosystem (UTCSP) was developed using the STELLA modeling tool. The structure of UTCSP consists of time-dependent simultaneous upward transport, accumulation, and transpiration of water and contaminants in the soil-plant-atmosphere continuum, which was driven by water potential gradients among soils, roots, stems, leaves, and atmosphere. The UTCSP model was calibrated using the experimental measurements and applied to predict phytoremediation of 1,4-dioxane from a sandy soil by a poplar tree. Simulation results showed that about 20% of 1,4-dioxane was removed from the soil by the poplar tree in 90 days. The simulations further revealed that while the mass of 1,4-dioxane in the poplar tree increased consecutively with time, the rates of water and 1,4-dioxane uptake and translocation in the roots, stems, and leaves have a typical diurnal distribution pattern: increasing during the day and decreasing during the night, resulting from daily variations of plant water potentials that were caused by leaf water transpiration. This study suggests that the UTCSP model is a useful tool for estimating phytoremediation of contaminants in the soil-plant ecosystems.</div>
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<Abstract><AbstractText>Knowledge of mechanisms for uptake, translocation, and accumulation of soil contaminants in plants is essential to successful applications of the phytoremediation technique. Analysis and evaluation of these mechanisms would be greatly facilitated by the availability of a dynamic model that can predict soil contaminant uptake by roots, transport from roots through stems to leaves, and accumulation in plant during the transport process. In this study, a dynamic model for uptake and translocation of contaminants from a soil-plant ecosystem (UTCSP) was developed using the STELLA modeling tool. The structure of UTCSP consists of time-dependent simultaneous upward transport, accumulation, and transpiration of water and contaminants in the soil-plant-atmosphere continuum, which was driven by water potential gradients among soils, roots, stems, leaves, and atmosphere. The UTCSP model was calibrated using the experimental measurements and applied to predict phytoremediation of 1,4-dioxane from a sandy soil by a poplar tree. Simulation results showed that about 20% of 1,4-dioxane was removed from the soil by the poplar tree in 90 days. The simulations further revealed that while the mass of 1,4-dioxane in the poplar tree increased consecutively with time, the rates of water and 1,4-dioxane uptake and translocation in the roots, stems, and leaves have a typical diurnal distribution pattern: increasing during the day and decreasing during the night, resulting from daily variations of plant water potentials that were caused by leaf water transpiration. This study suggests that the UTCSP model is a useful tool for estimating phytoremediation of contaminants in the soil-plant ecosystems.</AbstractText>
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Modeling the mechanisms for uptake and translocation of dioxane in a soil-plant ecosystem with STELLA.

Modeling the mechanisms for uptake and translocation of dioxane in a soil-plant ecosystem with STELLA.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki