Influence of Na2O/Al2O3and SiO2/Al2O3ratios on the immobilization of Pb from electric arc furnace into the fly ash based geopolymers
| Autor: | Radomir Zejak, Dijana Đurović, D. Blečić, Boban Mugoša, Irena Nikolić, Velimir Radmilovic |
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| Rok vydání: | 2013 |
| Předmět: |
electric arc furnace
lcsh:GE1-350 lead 021110 strategic defence & security studies Materials science Metallurgy 0211 other engineering and technologies Scrap 02 engineering and technology Geopolymer geopolymerization fly ash Compressive strength 13. Climate action Fly ash Water environment Chemical stability Leaching (metallurgy) Composite material lcsh:Environmental sciences 021102 mining & metallurgy Electric arc furnace |
| Zdroj: | E3S Web of Conferences, Vol 1, p 31007 (2013) |
| ISSN: | 2267-1242 |
| DOI: | 10.1051/e3sconf/20130131007 |
| Popis: | Electric arc furnace dust (EAFD) is by-product of iron and steel scrap remelting in electric arc furnace. This waste is classified as a hazardous material due to the leaching of heavy metals into the environment. Geopolymeryzation of fly ash into construction materials called - geopolymer is a considering as a possible way of immobilization of heavy metals from EAFD. Mechanical properties and chemical stability of geopolymers are mostly determined by the ratio between main oxides, Na2O, Al2O3 and SiO2. In this paper we have investigated possibility of Pb immobilization from EAFD into the fly ash based geopolymer. Geopolymers are synthesized at different Na2O/Al2O3 and SiO2/Al2O3 ratios. Compressive strength and chemical stability of geopolymers with respect to the leaching of Pb in water according to the EN 12457 regulation were tested. The results have shown that Na2O/Al2O3 and SiO2/Al2O3 ratios have influence on the compressive strength of geopolymers and Pb release in the water environment. |
| Databáze: | OpenAIRE |
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