| Article |
|---|
| Article name |
Microstructural Features of the Structure of Silicates in Slags of Thermal Processing of Municipal Solid Waste |
| Authors |
Kolodezhnaya E.V. candidate of technical sciences, senior researcher, engineer-technologist, kev@uralomega.ruGorlova, O.. doctor of technical sciences, professor, gorlova_o_e@mail.ruShadrunova I.V. professor, doctor of technical sciences, head of the Mining Ecology department, shadrunova_@mail.ruKolkova M.S. candidate of technical sciences, associate professor, kolkova_ms@mail.ruEfimova Y.. , Vorobyev K.A. postgraduate, junior researcher, Mining Ecology department, k.vorobyev98@mail.ru |
| Bibliographic description |
Kolodezhnaya E. V., Gorlova O. E., Shadrunova I. V., Kolkova M. S., Efimova Yu.Yu., Vorobiev K. A. Microstructural Features of the Structure of Silicates in Slags of Thermal Processing of Municipal Solid Waste // Transbaikal State University Journal. 2025. Vol. 31, no. 1. P. 39–50. DOI: 10.21209/2227-9245-2025-31-1-39-50 |
| Category |
Earth and Environmental Sciences |
| DOI |
669.054.82; 553.086 |
| DOI |
10.21209/2227-9245-2025-31-1-39-50 |
| Article type |
Original article |
| Annotation |
Modern sources of negative environmental impact are not limited to waste from the operation of industrial enterprises. A relatively new type of man-made waste for our country is slags of thermal processing of municipal solid waste (MSW). The article is devoted to the study of the specific features of the chemical and phase composition of slags formed during the combustion of MSW, the forms of inert and eco-controlled compounds in the slag, and the structure of its grains. The object of the study is the dump slag of the MSW thermal neutralization plant (Moscow region). Representative samples of solid waste were collected at the incinerator. The purpose of the study is to determine the directions of slag disposal to reduce environmental risks at landfills based on the study of the main components of slag and morphostructural features of technogenic phases. Slag is a complex-structured technogenic raw material, and therefore a detailed study of its material composition was carried out by a complex of mineralogical and analytical methods: mineralogical-petrographic, X-ray phase and electron microscopic with microprobe analysis. The results of the granulometric, chemical and mineral composition of slag from garbage incineration are presented. Morphostructural features of silicate slag grains have been established. The results of the chemical analysis of slag by X-ray fluorescence showed the presence of Cu, Zn, Cr, P and Ni in quantities exceeding MPC. However, the absence of independent phases, grains and secretions containing these elements indicates that metals in the slag may be contained in the form of trace impurities in other mineral complexes. It is concluded that technological solutions for complex slag disposal should include magnetic separation, fractionation and stabilization. The presence of phases in slags with a developed surface and a large number of active centers, the hydration of which is activated in the presence of alkali, has been established, which proves the possibility of using slag as an additive to cement. Recommendations are given on the choice of ways to stabilize the slag and proposed directions for the disposal of this waste to reduce the environmental impact.
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| Key words |
solid municipal waste, slag of thermal utilization of solid municipal swaste, leaching of pollutants, environmental impact, utilization of man-made waste, structure of man-made phases, morphostructural studies of silicates, granulometric composition, chemical composition, phase composition, hydration |
| Article information |
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| References |
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