Title: Synthesis of zeolitic-type adsorbent material from municipal solid waste incinerator bottom ash and its application in heavy metal adsorption
Authors: Chiang, Yi Wai ×
Ghyselbrecht, Karel
Santos, Rafael
Meesschaert, Boudewijn
Martens, Johan #
Issue Date: 1-Aug-2012
Publisher: Elsevier Science Publishers
Series Title: Catalysis Today vol:190 issue:1 pages:23-30
Abstract: Municipal solid waste incinerator (MSWI) bottom ash (BA) was converted to zeolitic-type adsorbent materials by hydrothermal conversion under strongly alkaline conditions. The conversion product was determined to be a mixture of sodium aluminum silicate hydrate (SASH) (Na2O·Al2O3·1.68SiO2·1.73H2O) and tobermorite (Ca5Si6O16(OH)2·4H2O). The BET specific surface area was 22.1 m2/g, which represented a significant gain compared to the BA (4.6 m2/g) due to the formation of micropores and mesopores. The converted BA demonstrated promising performance for application as a sorbent towards several heavy metals (oxyanions of As(V), and Cd2+, Co2+, Ni2+, Pb2+, and Zn2+). Its performance was found to be generally superior to that of a mainly clinoptilolite natural zeolite, achieving greater sorption extents and better stabilizing capability of contaminated sediments. At a lower dosage rate (50 mg sorbent per gram sediment) to that of natural zeolite, converted BA achieved greater than 80% reduction of cationic heavy metal concentrations in sediment porewater. These results suggest a promising route for reutilization of MSWI-BA, which can greatly enhance the sustainability of waste incineration technology.
ISSN: 0920-5861
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Process Engineering for Sustainable Systems Section
Microbial and Molecular Systems - miscellaneous
Centre for Surface Chemistry and Catalysis
Technologiecluster Bioengineering Technologie
Bioengineering Technology TC, Campus Bruges
× corresponding author
# (joint) last author

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