Abstract
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 organizations. 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 a...
Highlights
Particulates are very complex pollutants, having various sizes, shapes and made up of hundreds of different chemicals (US EPA 2005; Lazaridis et al 1999)
There is growing concern related to the health effects of particles, because results of experiments support hypothesis that physical and chemical properties of particles are involved in toxic and carcinogenic health effects (Spurny 2000; Baltrėnas et al 2008)
Particulate matter content is emitted from a large variety of sources with significant technical and economic differences that are strongly influenced by specific conditions of various countries (Lazaridis et al 1999; Zbigniew et al 2002)
Summary
Particulates are very complex pollutants, having various sizes, shapes and made up of hundreds of different chemicals (US EPA 2005; Lazaridis et al 1999). These devices differ in their physical and chemical features and measuring precision (Baltrėnas and Kvasauskas 2005) It is emphasized in Cooperative Program for Monitoring and Evaluation of the Long-range Transmission of Air Pollutants in Europe (EMEP) that every local measurement is on the base importance as the existing regional network is not capable to provide all-around information regarding particular matter (Lazaridis et al 2000; Ketzel et al 2004). Air Quality Monitoring Network exists in Lithuania, giving information about the main pollutants (Baltrėnas et al 1999; Hoekstra et al 2004), but it does not carry out aerosol number concentration measurements. As the experiment in Jonava was carried out for quite a short period of time, it was purposive to compare the results with those in Preila benefiting in assessing the nature (regional, local or city background) of particulate matter pollution in Jonava
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