Afficher la notice abrégée

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorSCHNEIDER, André
hal.structure.identifierLaboratoire Sols et Environnement [LSE]
dc.contributor.authorLIN, Zhongbing
hal.structure.identifierLaboratoire Sols et Environnement [LSE]
dc.contributor.authorSTERCKEMAN, Thibault
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorNGUYEN, Christophe
dc.date.accessioned2024-04-08T12:05:55Z
dc.date.available2024-04-08T12:05:55Z
dc.date.issued2018
dc.identifier.issn0048-9697
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196380
dc.description.abstractEnThe dissociation of metal complexes in the soil solution can increase the availability of metals for root uptake. When it is accounted for in models of bioavailability of soil metals, the number of partial differential equations (PDEs) increases and the computation time to numerically solve these equations may be problematic when a large number of simulations are required, for example for sensitivity analyses or when considering root architecture. This work presents analytical solutions for the set of PDEs describing the bioavailability of soil metals including the kinetics of complexation for three scenarios where the metal complex in solution was fully inert, fully labile, or partially labile. The analytical solutions are only valid i) at steady-state when the PDEs become ordinary differential equations, the transient phase being not covered, ii) when diffusion is the major mechanism of transport and therefore, when convection is negligible, iii) when there is no between-root competition. The formulation of the analytical solutions is for cylindrical geometry but the solutions rely on the spread of the depletion profile around the root, which was modelled assuming a planar geometry. The analytical solutions were evaluated by comparison with the corresponding PDEs for cadmium in the case of the French agricultural soils. Provided that convection was much lower than diffusion (Peclet's number < 0.02), the cumulative uptakes calculated from the analytic solutions were in very good agreement with those calculated from the PDEs, even in the case of a partially labile complex. The analytic solutions can be used instead of the PDEs to predict root uptake of metals. The analytic solutions were also used to build an indicator of the contribution of a complex to the uptake of the metal by roots, which can be helpful to predict the effect of soluble organic matter on the bioavailability of soil metals.
dc.language.isoen
dc.publisherElsevier
dc.subjectcomplexation
dc.subjectmodel
dc.subjectsorption
dc.subject.endepletion profile
dc.subject.enkinetics
dc.subject.enlability
dc.subject.enreaction layer
dc.subject.ensingle root
dc.subject.entrace metals
dc.title.enComparison between numeric and approximate analytic solutions for the prediction of soil metal uptake by roots. Example of cadmium
dc.typeArticle de revue
dc.identifier.doi10.1016/j.scitotenv.2017.11.069
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalScience of the Total Environment
bordeaux.page1194-1205
bordeaux.volume619-620
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02621508
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02621508v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Science%20of%20the%20Total%20Environment&amp;rft.date=2018&amp;rft.volume=619-620&amp;rft.spage=1194-1205&amp;rft.epage=1194-1205&amp;rft.eissn=0048-9697&amp;rft.issn=0048-9697&amp;rft.au=SCHNEIDER,%20Andr%C3%A9&amp;LIN,%20Zhongbing&amp;STERCKEMAN,%20Thibault&amp;NGUYEN,%20Christophe&amp;rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée