Phytoextraction from mine spoils: insights from New Caledonia
2015
Losfeld, Guillaume | Mathieu, Romain | L’huillier, Laurent | Fogliani, Bruno | Jaffré, Tanguy | Grison, Claude | Bio-inspired Chemistry and Ecological Innovations (ChimEco) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) | Institut Agronomique Néo-Calédonien (IAC) | Diversités biologique et fonctionnelle des écosystèmes terrestres | Laboratoire de Botanique et d'Ecologie Végétale Appliquées | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]) | ANR-11-ECOT-0011,Opportunité(E)4,La valorisation chimique et le recyclage vert des déchets miniers : une opportunité Environnementale, Ecologique, Ethique et Economique(2011)
International audience
Показать больше [+] Меньше [-]Английский. Increasing pressure on mineral resources has drawn research efforts into innovative supply and recycling. Metal-rich biomass produced in phytoextraction recently proved an interesting starting material for green chemistry. It allows the production of new catalysts, referred to as ecocatalysts. Ecocatalysts provide increased yields in chemical production and increased regio- and chemo-selectivity, which result in high added value. This new approach to using metal-rich biomass could spur the development of phytoextraction, a technique considered promising for long, yet without credible economic outlets. In this regard, metallophyte biodiversity hotspots, such as New Caledonia, are of particular interest for biomass supply. Potential phytoextraction from mine spoils using two species endemic to New Caledonia is discussed here. Geissois pruinosa, a hypernickelophore, and Grevillea exul, a Mn accumulator, were selected for these original experiments. The results presented here 20 months after plantation of young trees from a nursery show the interest of the approach. Mean Ni concentrations of up to 1513 mg kg−1 are reported in G. pruinosa, as well as 2000 mg kg−1 Mn in G. exul. Concentrations of Ni and Mn in the leaves of each species appear to be correlated with leaf age. Plantation of these species may also ensure mine reclamation, and experiments were conducted with the principles of ecological restoration in mind adding a further dimension to the approach.
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