Trace elemental characterization of fly ash |
| |
| Authors: | Michaela Kröppl Irene Lahoz Muñoz Michaela Zeiner |
| |
| Institution: | 1. Bio- and Environmental Technology, University of Applied Sciences , Upper Austria Campus Wels;2. Stelzhamerstr. 23, 4600 Wels, Austria michaela.kroeppl@fh-wels.at;4. School of Technical Engineering, University of Zaragoza , 50018 Zaragoza, Spain;5. Hasenhutgasse 7/5/9, 1120 Wien, Austria |
| |
| Abstract: | The purpose of this study was to determine heavy metal concentrations in ash samples taken from the filter of the gas cleaning system of biomass incinerators in Austria. Knowing the concentrations of heavy metals is important for the decision of further treatment or utilization of the ashes. The heavy metals contained in the ashes remain in the bottom ash of the incinerator or leave the incinerator with the off-gas and are collected in the off-gas filter. The amount of the metals in the collected fly ash depends on the composition of the input material. The aim of this study was to examine this influence and compare the results with literature data. For measurement, the fly ash samples were at first dissolved in a microwave digestion unit using nitric acid and hydrochloric acid. Afterwards, 20 metals were analyzed by inductively coupled plasma optical emission spectrometry. Al, Fe, Mg, Mn, and Zn were found in higher concentrations in the fly ash samples. The enrichment factor between the concentrations in the fly ash and the concentrations in the input material was on average in the range of 18. |
| |
| Keywords: | biomass incineration heavy metals fly ash |
|
|
