Role of natural nanoparticles on the speciation of Ni in andosols of la Reunion
Andosols on the island of Re´union have high nickel (Ni) concentrations due to the natural pedo-geochemical background. Enhanced knowledge of Ni speciation is necessary to predict the bioavailability and potential toxicity of this element. Ni speciation in these andosols, marked by the presence of high amounts of natural aluminosilicate nanoparticles, was investigated in two complementary systems: (i) In a soil sample-densimetric fractionation was first performed in order to separate the potential bearing phases, prior to Ni speciation characterization. (ii) In a synthetic sample-Ni reactivity with synthetic aluminosilicate nanoparticle analogs were studied. In both cases, Ni speciation was determined using X-ray absorption spectroscopy (XAS). The results revealed that Ni had the same local environment in both systems (natural and synthetic systems), and Ni was chemically linked to natural short-range ordered aluminosilicates or analogs. This complex represented about 75% of the total Ni in the studied soil.
Main Authors: | Levard, Clément, Doelsch, Emmanuel, Rose, Jérôme, Masion, Armand, Basile-Doelsch, Isabelle, Proux, Olivier, Hazemann, Jean-Louis, Borschneck, Daniel, Bottero, Jean Yves |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | P33 - Chimie et physique du sol, P02 - Pollution, Andosol, nickel, sol arable, http://aims.fao.org/aos/agrovoc/c_404, http://aims.fao.org/aos/agrovoc/c_5172, http://aims.fao.org/aos/agrovoc/c_568, http://aims.fao.org/aos/agrovoc/c_6543, http://aims.fao.org/aos/agrovoc/c_3081, |
Online Access: | http://agritrop.cirad.fr/550020/ http://agritrop.cirad.fr/550020/1/document_550020.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Nanoparticules naturelles : imogolites et allophanes. Structure, mécanismes de croissance et capacité de rétention des éléments traces métalliques
by: Levard, Clément -
New findings on natural aluminosilicate nanoparticles structure : A synthetic route approach and multi-scale characterization techniques
by: Levard, Clément, et al. -
Quelques propriétés rheologiques des andosols de la Réunion
by: Brouwers, Marinus, et al. -
Les méthodes d'évaluation du bilan hydrique des sols cultivés. Etude bibliographique
by: Marlet, Serge -
Characterisation of organic matter from organo-mineral complexes in an Andosol from Reunion Island
by: De Junet, Alexis, et al.