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Can ligand addition to soil enhance Cd phytoextraction? A mechanistic model study

hal.structure.identifierLaboratoire Sols et Environnement [LSE]
dc.contributor.authorLIN, Zhongbing
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorSCHNEIDER, Andre
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorNGUYEN, Christophe
hal.structure.identifierLaboratoire Sols et Environnement [LSE]
dc.contributor.authorSTERCKEMAN, Thibault
dc.date.accessioned2024-04-08T12:01:37Z
dc.date.available2024-04-08T12:01:37Z
dc.date.issued2014
dc.identifier.issn0944-1344
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196162
dc.description.abstractEnPhytoextraction is a potential method for cleaning Cd-polluted soils. Ligand addition to soil is expected to enhance Cd phytoextraction. However, experimental results show that this addition has contradictory effects on plant Cd uptake. A mechanistic model simulating the reaction kinetics (adsorption on solid phase, complexation in solution), transport (convection, diffusion) and root absorption (symplastic, apoplastic) of Cd and its complexes in soil was developed. This was used to calculate plant Cd uptake with and without ligand addition in a great number of combinations of soil, ligand and plant characteristics, varying the parameters within defined domains. Ligand addition generally strongly reduced hydrated Cd (Cd2+) concentration in soil solution through Cd complexation. Dissociation of Cd complex ( CdL ) could not compensate for this reduction, which greatly lowered Cd2+ symplastic uptake by roots. The apoplastic uptake of CdL was not sufficient to compensate for the decrease in symplastic uptake. This explained why in the majority of the cases, ligand addition resulted in the reduction of the simulated Cd phytoextraction. A few results showed an enhanced phytoextraction in very particular conditions (strong plant transpiration with high apoplastic Cd uptake capacity), but this enhancement was very limited, making chelant-enhanced phytoextraction poorly efficient for Cd.
dc.language.isoen
dc.publisherSpringer Verlag
dc.subjectphytoextraction
dc.subjectcomplexation
dc.subject.enligand addition
dc.subject.enmechanistic model
dc.subject.enplant root uptake
dc.subject.encadmium
dc.title.enCan ligand addition to soil enhance Cd phytoextraction? A mechanistic model study
dc.typeArticle de revue
dc.identifier.doi10.1007/s11356-014-3218-8
dc.subject.halSciences du Vivant [q-bio]/Sciences agricoles
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.journalEnvironmental Science and Pollution Research
bordeaux.page12811-12826
bordeaux.volume21
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue22
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02640076
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02640076v1
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