Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-23T16:15:04.875Z Has data issue: false hasContentIssue false
  • English
  • Français

Evidence of formation of the tridymite form of AlPO4 in some municipal sewage sludge ashes

Published online by Cambridge University Press:  14 November 2013

B. Peplinski ,
C. Adam ,
B. Adamczyk ,
R. Müller ,
R. Schadrack ,
M. Michaelis ,
F. Emmerling ,
H. Reuther  and
M. Menzel
B. Peplinski*
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
C. Adam
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
B. Adamczyk
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
R. Müller
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
R. Schadrack
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
M. Michaelis
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
F. Emmerling
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
H. Reuther
Affiliation:
Helmholtz-Zentrum Dresden-Rossendorf, Germany
M. Menzel
Affiliation:
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
*
E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Evidence is provided that the tridymite component observed in the X-ray diffraction patterns of some sewage sludge ashes (SSAs) should not be interpreted as the tridymite modification of SiO2 but as the tridymite form of AlPO4. This proof is based on a combined X-ray Powder Diffraction (XRD), X-ray fluorescence (XRF) and Mossbauer spectroscopy investigation of two SSAs produced at two fluidized bed incineration facilities, located in different municipalities and operated differently. The structural and chemical characterization was carried out on the ‘as received’ SSA samples as well as on the residues of these two SSAs pretreated by leaching in citric acid. In addition, direct proof is presented that the tridymite form of AlPO4 does crystallize from X-ray amorphous precursors under conditions that mimic the huge heating rate and short retention time (just seconds at T ≈ 850 °C) typical for fluidized bed incinerators.

Keywords

aluminum phosphateashfly ashincinerator ashsewage sludge ashtridymite form
Type
Technical Articles
Information
Powder Diffraction , Volume 28 , Supplement S2 , September 2013 , pp. S425 - S435
Copyright
Copyright © International Centre for Diffraction Data 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Adam, C., Peplinski, B., Michaelis, M., Kley, G. and Simon, F. G., (2009). “Thermochemical treatment of sewage sludge ashes for phosphorus recovery,” Waste Manage. (Oxford, U. K.) 29 (3), 1122–1128.CrossRefGoogle ScholarPubMed
Mahieux, P.-Y., Aubert, J.-E., Cyr, M., Coutand, M. and Husson, B. (2010). “Quantitative mineralogical composition of complex mineral wastes – Contribution of the Rietveld method,” Waste Manage. (Oxford, U. K.) 30 (3), 378–388.Google Scholar
Peplinski, B., Köcher, P. and Kley, G. (2006). “Application of the Rietveld method to the severely superimposed diffraction patterns of technical products containing a large number of solid solution phases,” Z. Kristallogr. Suppl. 23, 29–34.Google Scholar
Peplinski, B., Adam, C., Reuther, H., Vogel, C., Adamczyk, B., Menzel, M., Emmerling, F. and Simon, F.-G. (2011a). “First identification of the tridymite form of AlPO4 in municipal sewage sludge ash,” Z. Kristallogr. Proc. 1, 443–448.Google Scholar
Peplinski, B., Adamczyk, B., Adam, C. and Emmerling, F. (2011b). “Glimpses at individual reaction steps accompanying the crystallization of the tridymite form(s) of AlPO4 from an X-ray amorphous precipitate doped with potassium and magnesium,” Z. Kristallogr. Suppl. 31, 39.Google Scholar
Phillips, B. and Muan, A. (1959). “Phase equilibria in the system CaO-Iron oxide-SiO2 in Air,” J. Am. Ceram. Soc. 42, 413–423.CrossRefGoogle Scholar