Synthesis of Zeolitic-type Adsorbent Materials from Municipal Solid Waste Incinerator Bottom Ash and its Application in Heavy Metal Adsorption
heavy metals, adsorption, sorbent, zeolite, bottom ash, sediment
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.
Faculty of Applied Science & Technology
School of Chemical and Environmental Sciences
Peer Reviewed/Refereed Publication
© 2011 Elsevier B.V. All rights reserved.
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Original Publication Citation
Chiang, Y. W., Ghyselbrecht, K., Santos, R. M., Meesschaert, B., & Martens, J. A. (2012). Synthesis of Zeolitic-type Adsorbent Material From Municipal Solid Waste Incinerator Bottom Ash and Its Application in Heavy Metal Adsorption. Catalysis Today, 190(1), 23-30. doi:10.1016/j.cattod.2011.11.002
Chiang, Yi Wai; Ghyselbrecht, Karel; Santos, Rafael M.; Meesschaert, Boudewijn D.; and Martens, Johan A., "Synthesis of Zeolitic-type Adsorbent Materials from Municipal Solid Waste Incinerator Bottom Ash and its Application in Heavy Metal Adsorption" (2012). Faculty Publications and Scholarship. 10.
5 August 2016: At the time of publication, Sheridan College author Rafael M. Santos was associated with the Katholieke Universiteit Leuven in Belgium.