Effect of Grinding on Chrysotile, Amosite and Crocidolite and Implications for Thermal Treatment
| Autor: | Manuela Catalano, Alessandro F. Gualtieri, Andrea Bloise |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
amosite
lcsh:QE351-399.2 0211 other engineering and technologies 02 engineering and technology Thermal treatment 010502 geochemistry & geophysics medicine.disease_cause 01 natural sciences Amosite Asbestos Chrysotile Crocidolite Grinding Geotechnical Engineering and Engineering Geology Geology Crystallinity Adverse health effect medicine 0105 earth and related environmental sciences 021110 strategic defence & security studies lcsh:Mineralogy Metallurgy chrysotile crocidolite Fiber size asbestos grinding Agglomerate |
| Zdroj: | Minerals, Vol 8, Iss 4, p 135 (2018) Minerals; Volume 8; Issue 4; Pages: 135 |
| Popis: | Nowadays, due to the adverse health effects associated with exposure to asbestos, its inertization is one of the most important issues of waste risk management. Based on the research line of mechano-chemical and thermal treatment of asbestos containing materials, the aim of this study was to examine the effects of dry grinding on the structure, temperature stability and fibre size of chrysotile from Balangero (Italy), as well as standard UICC (Union for International Cancer Control) amosite and standard UICC (Union for International Cancer Control) crocidolite. Dry grinding was accomplished in an eccentric vibration mill by varying the grinding time (30 s, 5 and 10 min). Results show a decrease in crystallinity, the formation of lattice defects and size reduction with progressive formation of agglomerates in the samples after the mechanical treatment. Transmission electron microscopy (TEM) results show that the final product obtained after 10 min of grinding is composed of non-crystalline particles and a minor residue of crystalline fibres that are not regulated because they do not meet the size criteria for a regulated fibre. Grinding results in a decrease of temperature and enthalpy of dehydroxylation (ΔHdehy) of chrysotile, amosite and crocidolite. This permits us to completely destroy these fibres in thermal inertization processes using a lower net thermal energy than that used for the raw samples. |
| Databáze: | OpenAIRE |
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