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Hydrothermal treatment of bottom ash from the incineration of municipal solid waste: Retention of Cs(I), Cd(II), Pb(II) and Cr(III)

AuthorsPeña Penilla, Raúl; Guerrero Bustos, Ana María; Goñi Elizalde, Sara
KeywordsBottom ashIncineration of municipal solid waste
Metals retention waste disposal
Hydrothermal treatment
Issue Date28-Feb-2006
PublisherElsevier BV
CitationJournal of Hazardous Materials 129(1-3): 151-157 (2006)
AbstractThe retention of Cs+, Cd2+, Pb2+ and Cr3+ by the compounds formed as a result of the hydrothermal treatment of the bottom ash from the fluidized-bed incineration of municipal solid wastes is examined in this work. The amount of Cs+ retained and the distribution coefficient, Kd, were considerably lower than those for Cd2+, Pb2+ and Cr3+, independently of the type of compounds formed by the different bottom ash treatments. The high percentage of Cs+ retained (31%), with a Kd of 222 ml/g, occurred after treatment of the bottom ash in NaOH at 200°C, where zeolite-type A (Na6[AlSiO4]6·4H 2O) was the major compound, together with aluminum tobermorite (Ca5Si5Al(OH)O17·5H2O). In the case of Cd2+, Pb2+ and Cr3+, the amount retained was ∼99% under all of the conditions studied.
Publisher version (URL)http://dx.doi.org/10.1016/j.jhazmat.2005.08.024
Identifiersdoi: 10.1016/j.jhazmat.2005.08.024
issn: 0304-3894
Appears in Collections:(IETCC) Artículos
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