Analyse des molecules organochlorées piegées dans la matrice minérale des REFIOM

Abstract

Abstract Analysis of the chloroorganic trapped in the mineral matrix of fly ash. Incineration is often considered as the most efficient process for urban waste destruction. Although it is a rather clean technique, it is often suspected to be the source of severe pollutions such as metal pollution or dioxin and furan emissions. In order to reduce hazardous emissions, various operating furnace parameters can be controlled, like gas residence time, flame temperature and excess air flow rate, among others. According to European regulations, incineration fly ash corresponds to class I disposal landfills, which demonstrates that it is considered as a toxic waste. The aim of this work was to develop a non equilibrium plasma process in order to study the behaviour of chloroorganics trapped on fly ash by on-line mass spectrometric analysis. The identification of the desorption of chloroorganics trapped within the mineral matrix presents juridical and scientific aspects. This study shows the existence of chemical reactions between the excited species produced from the plasma and the molecules desorbed from the mineral matrix of fly ash during the plasma treatment through the chemical analysis of the gaseous effluent. Special emphasis was put on the physicochemical properties of fly ash (composition of mineral matrix, particles size…)