Sborník abstraktů 2010 - Fakulta chemická - Vysoké učení technické ...

Monosaccharide anhydrides in PM1
and PM2.5 aerosol in urban areas
Kamil Křůmal
Zbyněk Večeřa, Pavel Mikuška
Brno University of Technology, Faculty of Chemistry,
Institue of Chemistry and Technology of Environmental Protection
Purkyňova 464/118, 612 00 Brno, Czech Republic
krumal@fch.vutbr.cz
The concentrations of monosaccharide anhydrides (levoglucosan, mannosan,
galactosan) in PM1 and PM2.5 aerosol samples were measured in Brno and
Šlapanice in the Czech Republic in winter and summer 2009. 56 aerosol samples
were collected together at both sites to investigate the different sources that contribute
to aerosol composition in studied localities. Daily PM1 and PM2.5 aerosol
samples were collected on pre-fired quartz fibre filters.
The sum of average atmospheric concentration of levoglucosan, mannosan
and galactosan in PM1 aerosol in Šlapanice and Brno during winter was 513 and
273 ng m -3 , while in summer the sum of average atmospheric concentration of monosaccharide
anhydrides (MAs) was 42 and 38 ng m -3 , respectively. The sum of average
atmospheric concentration of MAs in PM1 aerosol formed 71 and 63% of the
sum of MA concentration in PM2.5 aerosol collected in winter in Šlapanice and
Brno, whereas in summer the sum of average atmospheric concentration of MAs in
PM1 aerosol formed 45 and 43% of the sum of MA concentration in PM2.5 aerosol
in Šlapanice and Brno, respectively.
In winter, the sum of MAs contributed significantly to PM1 mass ranging between
1.37% and 2.67% of PM1 mass (Brno - Šlapanice), while in summer the contribution
of the sum of MAs was smaller (0.28–0.32%). Contribution of the sum of MAs
to PM2.5 mass is similar both in winter (1.37–2.71%) and summer (0.44–0.55%).
The higher concentrations of monosaccharide anhydrides in aerosols in
Šlapanice indicate higher biomass combustion in this location than in Brno during
winter season. The comparison of levoglucosan concentration in PM1 and PM2.5
aerosol shows prevailing presence of levoglucosan in PM1 aerosol both in winter
(72% on average) and summer (60% on average).
The aerosol samples collected in Šlapanice and Brno in winter and summer
show comparable contributions of levoglucosan, mannosan and galactosan to the
total amount of monosaccharide anhydrides in both aerosol size fractions. Levoglucosan
was the most abundant monosaccharide anhydride with a relative average
contribution to the total amount of MAs in the range of 71–82% for PM1 aerosols
and 52–79% for PM2.5 aerosols.
Keywords: monosaccharide anhydrides; biomass burning; levoglucosan; manmonosaccharide
anhydrides; biomass burning; levoglucosan; mannosan;
galactosan