| Autor: |
Baglio, Lorenzo, Copani, Fabio, Leanza, Matteo, Amara, Giuseppe, Lombardo, Enrico, Ruscica, Rita |
| Předmět: |
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| Zdroj: |
Procedia-Environmental Science, Engineering & Management; 2018, Vol. 5 Issue 1, p11-20, 10p |
| Abstrakt: |
Fly ashes from hazardous waste incineration contain high concentrations of several heavy metals, and due to the potential leaching of these heavy metals and other toxic components. The speciation of heavy metals in fly ashes and other combustion residues is highly influenced by the metal's behavior and fate during the combustion process. More volatile metals, as for instance Cd, may vaporize during combustion and subsequent condense out on the surface of fly ash particles when the flue gas cools down downstream of the boiler. Thereby, the fly ash becomes enriched in volatile elements whereas the bottom ash is depleted in these elements. Non-volatile elements, on the other hand, are highly retained in the bottom ashes. Cd, Pb and Zn have all been found to be enriched in the fly ash fractions due to initial volatilization whereas Cu and Cr to a great extent are retained in the bottom ashes. Every firm operating in the field of the circular economy should adopt an industrial approach based on resource efficiency and the use and supply of sustainable raw materials, which can be achieved through innovative technologies, innovative methodologies and new business models. GE.S.P.I, one of the most innovative firms in Sicily, has become a leader in the sector of hazardous industrial waste disposal, adding value to waste through a groundbreaking technology. The result of the process is the production of energy, as well as the creation of ash, treated in order to separate dangerous heavy metals from the ash through the technique of eddy currents. Metals and purified ash can be then put on the market. The aim of this paper is to strictly analyze ashes coming from the process of incineration of hazardous industrial waste, and all the possible treatments to be implemented to extract heavy and precious metals from them. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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