Résidus ultimes de l'incinération de déchets ménagers : caractérisation chimique et minéralogique, essais de stabilisation par vitrification et comportement des verres à la lixiviation

Abstract : Incineration is an efficient way of eliminating household wastes, but the scrubbing of the fumes produces fly ash (REFIOM), which contains mainly Ca-Al silicates as well as alkali chlorides and calcium sulphates, and a large number of pollutant elements. Because of their toxic effects on the environment, Fench legislation requires that they be stabilized before strage. It is, however, first necessary to characterize the ashes. Methods were developed giving fractions of washed ashes through sieving and density separation, followed by analytical technique to determine the textures, mineralogy and chemical compositions of the fractions. It was possible to estimate weight proportions of the main phases and to obtain information about the host phases for the pollutant elements. High-temperature experiments were then performed to test the feasibility of vitrifying the ashes, particularly concerning the possible dissolution of chlorides and pollutant elements in a glassy or partly crystallized matrix. The last part of the study dealt with the durability of the stabilized glasses during leaching experiments under controlled conditions to determine the influence of pH of the solution, temperature and the specific surface of the glass, as a guide to estimate the long-term behaviour of glasses made from fly ash
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Theses
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http://docnum.univ-lorraine.fr/prive/INPL_T_1996_LE_FORESTIER_L.pdf
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Submitted on : Thursday, March 29, 2018 - 1:40:52 PM
Last modification on : Monday, April 8, 2019 - 12:06:02 PM

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Lydie Le Forestier. Résidus ultimes de l'incinération de déchets ménagers : caractérisation chimique et minéralogique, essais de stabilisation par vitrification et comportement des verres à la lixiviation. Autre. Institut National Polytechnique de Lorraine, 1996. Français. ⟨NNT : 1996INPL025N⟩. ⟨tel-01752315⟩

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