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Recovery of titanium (IV) by hydrometallurgical treatments from fly ashes generated from municipal incineration plants

TitoloRecovery of titanium (IV) by hydrometallurgical treatments from fly ashes generated from municipal incineration plants
Tipo di pubblicazionePresentazione a Congresso
Anno di Pubblicazione2005
AutoriFontana, Danilo, Giacco S., Pietrelli L., and Porzio V.
Conference NameREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology
Conference LocationMadrid
Parole chiaveAir control systems, Fly ash, Heavy metals, Hydrometallurgical treatments, Hydrometallurgy, Municipal solid wastes, Solvents, Sulfuric acid, Titanium, Waste treatment
Abstract

The incineration of municipal solid wastes produces several volatile heavy metals and these metals are vaporized as chlorides and concentrated in newly formed fly ash (FA) due to the application of the air control system to reduce the emissions of contaminants to the atmosphere. The FA produced during the incineration process is appreciatively within 10-30 kg of dry matter per ton of refuse. The FA contains many elements such as titanium that could be recovered instead disposed as hazardous waste. This investigation has shown that sulphuric acid leaching of fly ashes is effective where most of Ti was dissolved, then a selective recovery by solvent extraction is indispensable to obtain pure compounds. We have demonstrated that hydrometallurgical treatment of FA to recover some materials and in particular quaternary titanium is a potentially feasible method.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-32044461804&partnerID=40&md5=2b387c9ea78f4b74d3f30e5961b8ab67
Citation KeyFontana2005263