Hydrometallurgical recovery of zinc from ashes of automobile tire wastes.
Chemosphere
; 59(8): 1105-11, 2005 May.
Article
en En
| MEDLINE
| ID: mdl-15833484
ABSTRACT
Study has been performed on the investigation of metal leaching behavior for fly and bottom ashes from automobile tire wastes using acid and alkaline solutions from both viewpoints of environmental protection and resource utilization. The two ashes were found to contain substantial amounts of zinc and iron along with small quantities of cobalt, manganese, magnesium, copper, titanium and aluminum. The fly ash contained a much larger amount of zinc than the bottom ash, and seems to be a promising secondary source for the metal. Effects of such experimental parameters as temperature, time and solid-liquid ratio on the leaching behavior were investigated. Using three mineral acids and citric acid, selective leaching of zinc was successfully attained; the concentration of zinc in the leach liquors from the fly ash reached as high as 20 g l(-1) while the iron leaching was much suppressed. Selective separation of zinc was also attained in the leaching with alkaline solutions, though the percent leaching was lower than that in the acid leaching. Moreover, solvent extraction and precipitation were applied to the metal-loaded leach liquors as downstream processing to evaluate the feasibility of zinc recovery.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Zinc
/
Carbono
/
Eliminación de Residuos
/
Incineración
Idioma:
En
Revista:
Chemosphere
Año:
2005
Tipo del documento:
Article
País de afiliación:
Japón