Investigation of Aerosol Number Concentration in Jonava Town
Journal Title: Journal of Environmental Engineering and Landscape Management - Year 2009, Vol 17, Issue 1
Abstract
Though some authors declare that aerosol number concentration might be a better indicator of health effects of the particulates than the mass method, there is lack of aerosol number investigation studies. Most of air quality studies so far have been based on aerosol mass concentration measurements. Lithuanian National Air Quality Monitoring Network does not carry out aerosol number concentration measurements. Nonetheless, detailed particulate matter mass concentration investigation studies are made periodically in the biggest Lithuanian cities by various scientific organiza-tions. Jonava seems to be overpassed even there. This is the reason for choosing the investigation object. In Jonava town persistent measurements of aerosol number concentration were performed since 21 till 29 of November in the year 2006. The pollutants were measured with an optical particle counter AZ-5. The fluctuations of 24 hours, diurnal aerosol number concentration were analysed. The weather was favorable for pollutant accumulation and stood quite stable dur-ing the experimental period. The variation of aerosol number concentration was compared with other pollutants and wind speed changes. The increase of aerosol number concentration was detected with the decrease of wind speed and vice versa. The biggest concentration was detected when the wind blew from the South, there green territories are lo-cated. The increase of particulate concentration was not observed with the South-eastern wind directions coming from a fertilizer plant. The correlation between aerosol number concentration and nitrogen compounds was found. The ten-dency for high aerosol number concentrations was not observed during the rush hours as well as weekend effect could not be detected, indicating about low impact of local transportation. Comparison between particulate matter (PM10) mass and aerosol number concentrations was performed. The linear tendency between aerosol number and mass con-centration was found. The increase of PM10 mass concentration was found to be 1,6 μg/m3 for each additional 1000 aerosol particle cm–3. While comparing aerosol number concentration fluctuations in Jonava and Preila locations, the results exhibited great variability on both monitoring sites. Aerosol number concentration was higher in Preila in Febru-ary, March and April. Meanwhile, in summer months the aerosol number concentration increased on the urban site. These urban and rural differences were influenced by geographical and meteorological site peculiarities and air mass transport.
Authors and Affiliations
Raminta Vyzienė, Aloyzas Girgždys
Keywords
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- EP ID EP83252
- DOI 10.3846/1648-6897.2009.17.51-59
- Views 143
- Downloads 0
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