Carbonation of Municipal Solid Waste Incineration Fly Ash and the Impact on Metal Mobility
Publication: Journal of Environmental Engineering
Volume 129, Issue 5
Abstract
Fly ash from municipal solid waste incineration (MSWI) is considered as hazardous waste that calls for a robust, reliable, and reasonable treatment technique. This investigation aims to assess the impact of partial pressure, water addition, time, and temperature on the stabilization of MSWI fly ash with particular emphasis on Pb, Zn, Cd, and Cr. Carbonation and element mobility were studied by applying thermal analysis and leaching assays on fly ash samples treated according to a factorial design. The relationship between the factors and the response variables was evaluated using partial least squares modeling. Chemical equilibrium calculations were performed so as to complement the experimental findings. Decalcification of carbonated fly ash in a typical Swedish landfill was estimated at Treatment through carbonation reduced the availability of Pb and Zn about 100 times and also the carbonate alkalinity of (FS represents the fixed solids) was remedied successfully. However, shortcomings that need to be resolved are the remobilization of Cr with time and the mobilization of Cd.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 129 • Issue 5 • May 2003
Pages: 435 - 440
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jan 15, 2002
Accepted: Apr 16, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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