Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux

Abstract : Great variability of nanomaterials wastes are widely produced throughout the world. At the end of their life, the leaching of the wastes stored in landfills, leads to the emission of contaminants (organic and metallic) which modes of transport differ widely according to the interactions they have with ligands present in the medium. The European Union wants to promote long-term gradual reduction of contaminant releases to the environment and the Ministry of Ecology plans to establish specific standards limiting emissions of nanoparticles. But to date, limited data are available on the quantities of contaminants potentially emitted by wastes and their transport capacity. In particular, the contaminants present in nanoparticulate form, easily bioavailable, have a dynamic behavior misidentified and therefore unpredictable.The complexity and variability in the composition of waste and nanomaterials involve the study of a wide range of them; so, our work has focused on quantifying the emission of nanoparticles during their aging from various wastes (red mud residues, sewage sludge, marine sediments and domestic wastes incineration bottom ash MIOMs) and their transport through a porous medium.We identified metallic elements largely present in colloidal form and their fate after 1½ years of aging. Transport tests of nanoparticles led by column percolation experiments have shown that the transport of the metal nanoparticles is facilitated in some cases, in others, more typically slowed down. Scanning Electron Microscopy have shown that many metals were associated with aluminum and iron oxides and natural organic humic-like substances.
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Amandine Anderson. Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux. Chimie organique. Université de Toulon, 2016. Français. ⟨NNT : 2016TOUL0020⟩. ⟨tel-01583986⟩

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