Abstract
A field study aimed to characterize atmospheric pollutants in the gaseous and the particulate phases was conducted during the fall–winter of 2004 and the summer of 2005 in the Ashdod area, Israel. The site is influenced by both anthropogenic sources (power plants, refineries, chemical and metal industries, a cargo port, road traffic) and natural sources (sea-spray and desert dust). The use of diffusion lines—a series of annular diffusion denuders for sampling gaseous compounds followed by a cyclone and a filter pack for determining PM2.5 composition—allowed a good daily characterization of the main inorganic compounds in both the gaseous (HCl, HNO3, SO2, NH3) and the particulate phase (Cl−, NO3 −, SO4 =, NH4 +, and base cations). During the summer campaign two other activities were added: an intensive 3-h sampling period and the determination of PM2.5 bulk composition. The results were interpreted on the basis of meteorological condition, especially the mixing properties of the lower atmosphere as determined by monitoring the natural radioactivity due to Radon progeny, a good proxy of the atmospheric ability to dilute pollutants. Several pollution episodes were identified and the predominance of different sources was highlighted (sea-spray, desert dust, secondary photochemical pollutants). During the summer period a considerable increase of nitric acid and particulate sulphate was observed. Secondary inorganic pollutants (nitrate, sulphate and ammonium) constituted, on the average, 57% of the fine particle fraction, organic compounds 20%, primary anthropogenic compounds 14%, natural components (sea-spray and crustal elements) 9%. The advantages of the diffusion lines in determining gaseous and particulate N- and S- inorganic compounds are discussed.
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Perrino, C., Catrambone, M., Esposito, G. et al. Characterisation of gaseous and particulate atmospheric pollutants in the East Mediterranean by diffusion denuder sampling lines. Environ Monit Assess 152, 231–244 (2009). https://doi.org/10.1007/s10661-008-0311-9
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DOI: https://doi.org/10.1007/s10661-008-0311-9