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Accelerated carbonation of different size fractions of bottom ash from RDF incineration

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jul 2010 Italy Publisher:Elsevier BVJournal:Waste Management, volume 30, pages 1,310-1,317 (issn: 0956-053X,

Authors: R. Baciocchi; G. Costa; E. Lategano; MARINI, CARLO; POLETTINI, Alessandra; POMI, Raffaella; POSTORINO, Paolo; +1 Authors

doi: 10.1016/j.wasman.2009.11.027

pmid: 20045306

handle: 20.500.14243/239868 , 2108/10208 , 11573/227597

Accelerated carbonation of different size fractions of bottom ash from RDF incineration

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Abstract

This paper investigates the effects of accelerated carbonation on the characteristics of bottom ash from refuse derived fuel (RDF) incineration, in terms of CO(2) uptake, heavy metal leaching and mineralogy of different particle size fractions. Accelerated aqueous carbonation batch experiments were performed to assess the influence of operating parameters (temperature, CO(2) pressure and L/S ratio) on reaction kinetics. Pressure was found to be the most relevant parameter affecting the carbonation yield. This was also found to be largely dependent on the specific BA fraction treated, with CO(2) uptakes ranging from approximately 4% for the coarse fractions to approximately 14% for the finest one. Carbonation affected both the mineralogical characteristics of bottom ash, with the appearance of neo-formation minerals, and the leaching behaviour of the material, which was found to be mainly related to the change upon carbonation in the natural pH of the ash.

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Italy

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Keywords

Waste Products, MANAGEMENT; RESIDUES, Settore ICAR/03 - INGEGNERIA SANITARIA - AMBIENTALE, Incineration, Carbon Dioxide, CAPACITY, SOLID-WASTE INCINERATOR, Kinetics, Metals, Heavy, Particle Size, BEHAVIOR

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