LEACHING TEST OF VITRIFIED FLY ASH AND CERAMIC SLAG FROM AN INCINERATOR OF MUNICIPAL SOLID WASTE (MSW) TREATED WITH Ca(OH)2 AT DIFFERENT CONCENTRATIONS AND WITH MARLSTONE
TEST DE LESSIVAGE DE CENDRES VITRIFIÉES ET DÉCHETS DE CÉRAMIQUES D'UN INCINÉRATEUR DE RÉSIDUS SOLIDES URBAINS, RSU TRAITÉS AVEC Ca(OH)2 À DIFFÉRENTES CONCENTRATIONS ET AVEC DE LA MARNE
TEST DI CESSIONE DI CENERI VETRIFICATE E SCORIE DI CERAMICHE DI UN INCENERITORE DI RIFIUTI SOLIDI URBANI (RSU) TRATTATE CON Ca(OH)2 A DIFFERENTI CONCENTRAZIONI E MARNE
Creators: name: Vittori Antisari, Livia; Department Of Agroenvironmental Sciences And Technologies, University Of Bologna, Soil Study And Analysis Experimental Centre, Bologna
name: Pontalti, Francesca; Department Of Agroenvironmental Sciences And Technologies, University Of Bologna, Soil Study And Analysis Experimental Centre, Bologna
name: Simoni, Andrea; Department Of Agroenvironmental Sciences And Technologies, University Of Bologna, Soil Study And Analysis Experimental Centre, Bologna
name: Vianello, Gilmo; Department Of Agroenvironmental Sciences And Technologies, University Of Bologna, Soil Study And Analysis Experimental Centre, Bologna
Publisher: name: EQA - International Journal of Environmental QualityEQA - International Journal of Environmental Quality
Year: 2013
Subjects: incinerator ashes; in-situ remediation; leaching test; Ca(OH)2; smectitic marlstone; environmental restoration
scorie di incenerimento; bonifica in-situ; test di cessione; Ca(OH)2; marne smectitiche; rinaturalizzazione

description: A public property site, situated on an alluvial terrace of the Idice Stream (Emilia Romagna Region-Italy) was contaminated by a layer of waste, constituted by vitrified fly ashes and ceramic materials produced by an incinerator of municipal solid waste. The waste had high contents of heavy metals which exceeded the Italian legal concentration limits for Cd, Cu, Pb and Zn (D. Lgs. 152/06, all. 5, tab.1). The in-situ remediation of the area was possible. In this study, alternative materials than the Portland cement were tested for the environmental restoration and the further naturalization of the area. Leaching tests were carried out treating the ashes with different concentrations of hydrated lime (CaOH2) and also with lime at 20% concentration and smectic marlstone. At the end of the leaching test, most of the heavy metals in the waste were immobilized in the waste by the lime/marlstone treatment.
description: A public property site, situated on an alluvial terrace of the Idice Stream (Emilia Romagna Region-Italy) was contaminated by a layer of waste, constituted by vitrified fly ashes and ceramic materials produced by an incinerator of municipal solid waste. The waste had high contents of heavy metals which exceeded the Italian legal concentration limits for Cd, Cu, Pb and Zn (D. Lgs. 152/06, all. 5, tab.1). The in-situ remediation of the area was possible. In this study, alternative materials than the Portland cement were tested for the environmental restoration and the further naturalization of the area. Leaching tests were carried out treating the ashes with different concentrations of hydrated lime (CaOH2) and also with lime at 20% concentration and smectic marlstone. At the end of the leaching test, most of the heavy metals in the waste were immobilized in the waste by the lime/marlstone treatment.
description: Un sito di proprietà pubblica, posto su un terrazzo alluvionale del torrente Idice (Emilia Romagna-Italia) è risultato contaminato da uno strato di scorie costituite da materiale ceramico e ceneri vetrificate provenienti da un impianto di incenerimento di rifiuti solidi urbani. Le scorie presentavano concentrazioni in alcuni metalli pesanti (Cd, Cu, Pb, Zn) che  superavano i limiti previsti dalla legge italiana (D. Lgs. 152/06, all. 5, tab.1). Essendo possibile la bonifica in-situ dell’area si è voluto testare l’uso di materiali di inertizzazione alternativi al cemento Portland, per un più idoneo recupero ambientale e per una successiva rinaturalizzazione dell’area. È stato applicato il metodo del test di cessione sulle scorie trattate con  concentrazioni diverse di calce Ca(OH)2 e con calce addizionata a marne smectitiche. Quest’ultimo trattamento si è dimostrato il più efficace nell’immobilizzare la quasi totalità dei metalli pesanti presenti nelle scorie.
description: EQA - International Journal of Environmental Quality; Vol 5 (2010); 23-32