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Optimization and using mercury determination in air.
POSPÍCHAL, Aleš
In this master thesis, during 2009, 2010 and 2011, has been done measurement of total content of mercury in ambient air and soil air in urban and rural locations agglomeration of České Budějovice. The goal was to develop suitable method in order to provide sampling of air to evaluate rate of contamination from chosen locations. The aquaristic compressor was used for admission of air, thus collected air could pass through external amalgamator, which secured pre-concentration of mercury from air. Consecutively, captured mercury has been determined in laboratory by atomic absorption spectrometer AMA-254. In urban background locations has been found total average concentration of mercury in rate 4,01 +/- 3,5 ng.m-3 and urban locations influenced by traffic in rate 29,5 +/- 50,07 ng.m-3. The concentration of mercury in soil air taken from filter bed of constructed wetland (CW) was 16 +/- 9,44 ng.m-3 with average mercury flux 14,5 +/- 8,3 ng.m-2.h-1. In rural compared location has been concentration of mercury in rate 15,4 +/- 7,83 ng.m-3 and mercury flux in soil air was 16 +/- 9,3 ng.m-2.h-1 at this location. Significant differences in contamination of mercury among partial locations have not been ascertained to the exception. The statutory limit for amount of mercury in atmosphere is 50 ng.m-3, whose value has not been mostly reached in any of measured locations. Thus, it has been proved that air contamination is low at selected locations.
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