Author/Editor		Beričnik-Vrbošek, Julija; Pichlmayer, Friederich; Blochberger, Karl; Jeran, Zvonka; Marsel, Jože
Title		Isotopic analysis of sulphur in the assessment of SO2 emission sources
Type		članek
Source		Acta Chim Slov
Vol. and No.		Letnik 49
Publication year		2002
Volume		str. 149-57
Language		eng
Abstract		Reported herein is the isotopic composition of sulphur in Norway spruce needles, lichens and soils from two well-detined climatic regions in Slovenia: The Šalek Valley and the Zasav,je region. The samples are from distinct locations in these regions, where the irnpact of SO2 on vegetation is well documented. In both regions, the main source of SO2 pollution is from thermal power stations. The isotopic measurements of Nor,vay spruce needles were complemented with delta 31S-analyses of coals (lignite and brown coal) and SU in stack-gases from two thermal power plants, to correlate SO2 pollution with a specitic emission source. Reference samples of SO2 from an unpolluted region (The Triglav National Park;) were collected for comparison. To elucidate the turn over of SO2 from source to spruce needles ria air and/or soil, characteristic soils and lichens (Hypogymnia physodes) were sampled. The sulphur in the samples was converted by combustion in a small oxygen bomb (Parr Instrument> to sulphate, precipitated as BaSO1 and the delta 31S values measured using an isotope ratio mass spectrometer coupled on-line to an elemental analyser. The delta 31S values demonstrate only a close relationship between environmental SO2 and lichens. Correlation between a particular emission source and the apparent impact on vegetation from the delta 31S values is not straightforward.
Descriptors		SULFUR POWER PLANTS AIR POLLUTANTS, ENVIRONMENTAL SULFUR DIOXIDE LICHENS TREES SOIL POLLUTANTS GLUTATHIONE SPECTRUM ANALYSIS, MASS