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Waste Management & Research
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Article

Experimental design and process analysis for acidic leaching of metal-rich glass wastes

A Tuncuk1, A Ognyanova2, H Ciftci1, F Vegliò2, and Ata Akcil3*

1 Suleyman Demirel University
2 University of L’Aquila, Monteluco di Roio
3 Suleyman Demirel University,

* To whom correspondence should be addressed. E-mail: ata{at}mmf.sdu.edu.tr.


  Abstract

The removal of iron, titanium and aluminium from colourless and green waste glasses has been studied under various experimental conditions in order to optimize the process parameters and to decrease the metal content in the waste glass by acidic leaching. Statistical design of experiments and ANOVA (analysis of variance) were performed in order to determine the main effects and interactions between the investigated factors (sample ratio, acid concentration, temperature and leaching time). A full factorial experiment was performed by sulphuric acid leaching of glass for metal removal. After treating, the iron content was 530 ppm, corresponding to 1880 ppm initial concentration of Fe2O3 in the original colourless sample. This result is achieved using 1M H2SO4 and 30% sample ratio at 90°C leaching temperature for 2 hours. The iron content in the green waste glass sample was reduced from 3350 ppm initial concentration to 2470 ppm after treating.

First published on September 11, 2009
Waste Management & Research 2009, doi:10.1177/0734242X09335702
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