Alkali activation processes for incinerator residues management.

Incinerator bottom ash (BA) is produced in large amount worldwide and in Italy, where 5.1 millionstons of municipal solid residues have been incinerated in 2010, corresponding to 1.2-1.5 millionstons of produced bottom ash. This residue has been used in the present study for producing dense geopolymers containing high percentage (50-70 wt%) of ash. The amount of potentially reactive aluminosilicate fraction in the ash has been determined by means of test in NaOH. The final properties of geopolymers prepared with or without taking into account this reactive fraction have been compared. The results showed that due to the presence of both amorphous and crystalline fractions with a different degree of reactivity, the incinerator BA geopolymers exhibit significant differences in terms of Si/Al ratio and microstructure when reactive fraction is considered.

[1]  W. Schmahl,et al.  Characterization of MSWI fly ash through mineralogy and water extraction , 2011 .

[2]  L. M. Schabbach,et al.  Minimization of Pb content in a ceramic glaze by reformulation the composition with secondary raw materials , 2011 .

[3]  J. Zhai,et al.  Synthesis of thermostable geopolymer from circulating fluidized bed combustion (CFBC) bottom ashes. , 2010, Journal of hazardous materials.

[4]  J. Provis,et al.  Attenuated total reflectance fourier transform infrared analysis of fly ash geopolymer gel aging. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[5]  Joel Davis,et al.  Aqueous leachability of metakaolin-based geopolymers with molar ratios of Si/Al = 1.5 4 , 2008 .

[6]  Hideki Yamamoto,et al.  Mechanism of zeolite synthesis from coal fly ash by alkali hydrothermal reaction , 2002 .

[7]  L Morselli,et al.  Reuse of incinerator bottom and fly ashes to obtain glassy materials. , 2008, Journal of hazardous materials.

[8]  J. Vale,et al.  Stabilization/solidification of a municipal solid waste incineration residue using fly ash-based geopolymers. , 2011, Journal of hazardous materials.

[9]  Rupert J. Myers,et al.  X-ray microtomography shows pore structure and tortuosity in alkali-activated binders , 2012 .

[10]  J. Davidovits.  Geopolymers : inorganic polymeric new materials , 1991 .

[11]  Alexander Hoppe,et al.  Bottom Ash‐Based Geopolymer Materials: Mechanical and Environmental Properties , 2011 .

[12]  J.S.J. van Deventer,et al.  The Role of Mathematical Modelling and Gel Chemistry in Advancing Geopolymer Technology , 2005 .

[13]  P. Michaud,et al.  Defining existence domains in geopolymers through their physicochemical properties , 2013 .

[14]  J. Deventer,et al.  Do Geopolymers Actually Contain Nanocrystalline Zeolites? A Reexamination of Existing Results , 2005 .

[15]  A. Karamanov,et al.  Structure, chemical durability and crystallization behavior of incinerator-based glassy systems , 2008 .

[16]  Wei Wang,et al.  The effects of alkaline dosage and Si/Al ratio on the immobilization of heavy metals in municipal solid waste incineration fly ash-based geopolymer. , 2010, Chemosphere.

[17]  M. H. Fernandes,et al.  Characterization of MSWI bottom ashes towards utilization as glass raw material. , 2008, Waste management.

[18]  Warren A. Dick,et al.  Compressive strength and microstructural characteristics of class C fly ash geopolymer , 2010 .

[19]  I. Topcu,et al.  Properties of geopolymer from circulating fluidized bed combustion coal bottom ash , 2011 .

[20]  M. Ferraris,et al.  Use of vitrified MSWI bottom ashes for concrete production. , 2009, Waste management.

[21]  Xingbao Gao,et al.  Immobilization of MSWI fly ash through geopolymerization: effects of water-wash. , 2011, Waste management.

[22]  E. Karamanova,et al.  Post-treated incinerator bottom ash as alternative raw material for ceramic manufacturing , 2012 .

[23]  W. H. Flank,et al.  Mechanism of Zeolite A Synthesis , 1977 .

[24]  Michelina Catauro,et al.  Inorganic polymers from alkali activation of metakaolin: Effect of setting and curing on structure , 2013 .

[25]  Wei Wang,et al.  A study on the chemical and mineralogical characterization of MSWI fly ash using a sequential extraction procedure. , 2006, Journal of hazardous materials.

[26]  P. Chindaprasirt,et al.  Comparative study on the characteristics of fly ash and bottom ash geopolymers. , 2009, Waste management.

[27]  Prinya Chindaprasirt,et al.  Utilization of blended fluidized bed combustion (FBC) ash and pulverized coal combustion (PCC) fly ash in geopolymer. , 2010, Waste management.

[28]  Dottorato Di Ricerca.  Istituto Superiore per la Protezione e Ricerca Ambi entale , 2011 .

[29]  Luisa Barbieri,et al.  Chemical stability of geopolymers containing municipal solid waste incinerator fly ash. , 2010, Waste management.

[30]  John L. Provis,et al.  Technical and commercial progress in the adoption of geopolymer cement , 2012 .

[31]  Ivano Vassura,et al.  The recycling of MSWI bottom ash in silicate based ceramic , 2010 .

[32]  E. Karamanova,et al.  Integrated approach to establish the sinter-crystallization ability of glasses from secondary raw material , 2011 .

[33]  I. Lancellotti,et al.  Structural studies and electrical properties of recycled glasses from glass and incinerator wastes , 2001 .

[34]  Catherine L. Nicholson,et al.  The composition range of aluminosilicate geopolymers , 2005 .

[35]  L. M. Schabbach,et al.  Valorization of MSWI bottom ash through ceramic glazing process: a new technology , 2012 .

[36]  A. V. Riessen,et al.  Quantification of the Extent of Reaction of Metakaolin-Based Geopolymers using X-Ray Diffraction, Scanning Electron Microscopy, and Energy-Dispersive Spectroscopy , 2011 .