Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
A. Limbeck, G. Bauer, G. Friedbacher, P.H. Brunner:
"Characterization of single fly ash particles using LA-ICP-MS - investigation of particle composition and homogeneity";
Vortrag: 10. Symposium Massenspektrometrische Verfahren Elementspurenanalyse,
Tulln, Austria;
10.09.2012
- 12.09.2012; in: "ABSTRACTBAND",
(2012),
S. 25.
Kurzfassung englisch:
Ashes from municipal solid waste incineration (MSWI) as they are produced today are rich in heavy metals and are therefore potential resources for metal recovery but also potential sources for environmental pollution. So far state of the art treatment methods for MSWI bottom ash only remove coarse metals. Regarding highly toxic MSWI fly ashes, industrial scale decontamination technologies are not available yet. Knowledge on the distribution of metals in fly ash will help to find optimal treatment techniques and parameters (including use of additives) for the decontamination process. In this contribution LA-ICP-MS has been used for spatially resolved characterization of isolated fly ash particles. The varying bulk composition of fly ash particles is already documented in literature, but it has not been studied yet if distinct carrier particles exist for heavy metals respectively if several matrices preferentially incorporate these trace elements. Inner particle distribution is another open question, since this information might lead to a better understanding of how the fly ash matrix receives the heavy metal load during combustion - incorporation during particle formation or condensation of vapors on the particle surface. Thus the present study involved LA-ICP-MS investigations on the distribution of selected trace metals within fly ash particles. Measurements were performed using spatially resolved analysis (line profiling) as well as continuous in-depth ablation focusing at a particular spot (also referred as drilling mode). LA-ICP-MS measurements were complemented by scanning electron microscopy for improved assessment of particle shape and diameter.
Schlagworte:
LA-ICPMS, single particle analysis, trace metal analysis
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.