Role of natural nanoparticles on the speciation of Ni in andosols of la Reunion

Levard Clément, Doelsch Emmanuel, Rose Jérôme, Masion Armand, Basile-Doelsch Isabelle, Proux Olivier, Hazemann Jean-Louis, Borschneck Daniel, Bottero Jean Yves. 2009. Role of natural nanoparticles on the speciation of Ni in andosols of la Reunion. Geochimica et Cosmochimica Acta, 73 (16) : pp. 4750-4760.

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Abstract : 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. (Résumé d'auteur)

Mots-clés Agrovoc : Andosol, Nickel, Sol arable

Mots-clés géographiques Agrovoc : Réunion

Mots-clés complémentaires : Nanoparticule

Classification Agris : P33 - Soil chemistry and physics
T01 - Pollution

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

  • Levard Clément, Université d'Aix-Marseille (FRA)
  • Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296
  • Rose Jérôme, Université d'Aix-Marseille (FRA)
  • Masion Armand, Université d'Aix-Marseille (FRA)
  • Basile-Doelsch Isabelle, Université d'Aix-Marseille (FRA)
  • Proux Olivier, CNRS (FRA)
  • Hazemann Jean-Louis, CNRS (FRA)
  • Borschneck Daniel, Université d'Aix-Marseille (FRA)
  • Bottero Jean Yves, Université d'Aix-Marseille (FRA)

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