Please use this identifier to cite or link to this item:
Title: Removal of metallic Al and Al/Zn alloys in MSWI bottom ash by alkaline treatment
Authors: Xuan, D 
Poon, CS 
Keywords: Alkali-silica effect
Alkaline treatment
Heavy metals
Incineration bottom ash
Metallic Al and alloy
Issue Date: 2018
Publisher: Elsevier
Source: Journal of hazardous materials, 2018, v. 344, p. 73-80 How to cite?
Journal: Journal of hazardous materials 
Abstract: In order to reduce the leaching of pollutants and remove the Al and Zn/Al alloy from municipal solid waste incineration bottom ash (MSWIBA), an optimized alkaline pre-treatment procedure was developed in this study. The influences of alkaline conditions on the removal rate of Al and Zn/Al alloy were investigated, including [OH]− concentration, temperature, particle size, liquid/solid ratio and treatment duration. The experimental results showed that the optimized alkaline pre-treatment conditions to efficiently remove the Al and Zn/Al alloy was by using a minimum of 1.0 mol/l [OH]−, at 55 °C and with a minimal liquid/solid ratio of 5. The removal rate of Al and Zn/Al alloy followed an S-shape curve, in which the slow beginning stage was attributed to the protection of the oxidation layer and the quenched product around the Al and Al/Zn alloy. After 3 h of the optimized alkaline pre-treatment, the leaching of Cr, Cu, Pb and Zn of the treated MSWIBA was reduced by more than 90% of that of the original MSWIBA. The alkali-silica reaction test further indicated that the expansion of concrete prepared with the pre-treated MSWIBA was significantly reduced and there was no macro-crack or spalling damage on the surface of the tested specimens.
ISSN: 0304-3894
EISSN: 1873-3336
DOI: 10.1016/j.jhazmat.2017.10.002
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Apr 6, 2019


Last Week
Last month
Citations as of Apr 8, 2019

Page view(s)

Last Week
Last month
Citations as of Apr 23, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.