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Determination of th...
Determination of the cd-bearing phases in municipal solid waste and Biomass single fly ash particles using SR-mu XRF Spectroscopy
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- Camerani, Maria Caterina (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Somogyi, Andrea (author)
- SOLEIL Synchrotron
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- Vekemans, Bart (author)
- Universiteit Antwerpen,University of Antwerp
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- Ansell, Stuart (author)
- STFC Rutherford Appleton Laboratory
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- Simionovici, Alexandre S. (author)
- École Normale Supérieure de Lyon
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- Steenari, Britt-Marie, 1953 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Panas, Itai, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2007-08-04
- 2007
- English.
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In: Analytical Chemistry. - : American Chemical Society (ACS). - 0003-2700 .- 1520-6882. ; 79:17, s. 6496-6506
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Abstract
Subject headings
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- By using an excitation energy of 27.0 keV, synchrotron radiation-induced micro-X-ray fluorescence (SR-mu XRF) is employed to extract information regarding the composition and distribution of Cd-bearing phases in municipal solid waste (MSW) and biomass fly ashes. Significance of observation is based on statistics of totally more than 100 individual MSW and biomass fly ash particles from a fluidized bed combustion (FBC) plant. Cd concentrations in the parts-per-million range are determined. In general, although previous leaching studies have indicated Cd to be predominant in the smaller-size ash particles, in the present study Cd is more evenly distributed throughout all the particle sizes. For MSW fly ashes, results indicate the presence of Cd mainly as CdBr2 hot-spots, whereas for biomass fly ashes, which exhibit lower CdX2 concentration, a thin Cd layer on/in the particles is reported. For both ashes, Ca-containing matrixes are found to be the main Cd-bearing phases. Support for this observation is found from independent first-principles periodic density functional theory calculations. The observations are condensed into a schematic mechanism for Cd adsorption on the fly ash particles.
Subject headings
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- COMBUSTION
- X-RAY FLUORESCENCE
- INDIVIDUAL PARTICLES
- TOXIC METAL EMISSIONS
- MICRO-BEAM SPECTROMETRY
- INCINERATION
- ELEMENTS
- HEAVY-METALS
- SPECIATION
- BEHAVIOR
Publication and Content Type
- art (subject category)
- ref (subject category)
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