SIZE-DISTRIBUTIONS OF WATER SOLUBLE COMPONENTS OF ATMOSPHERIC AEROSOL MEASURED WITH A MOUDI IMPACTOR

D. Contini, D. Cesari, A. Genga, M. Siciliano, P. Ielpo, M. R. Guascito, M. Conte

Abstract

Understanding climate and health effects of atmospheric aerosol is an important aspect of research. These effects are strongly related to the size-distribution of particles and of chemical components contained in aerosol. In this work aerosol was collected, in an urban background site in Lecce, using a 10-stages Micro-Orifice Uniform Deposit Impactor (MOUDI). Collected samples were analysed to evaluate the size-segregated composition of water soluble ions (Ca²⁺, Mg²⁺, K⁺, NH₄⁺, Na⁺, SO₄^2-, NO3^- and Cl^-), using High Performance Ion Chromatography (HPIC), and of water soluble organic (WSOC) and inorganic (WSIC) carbon, using a TOC analyzer. Collected data were used to estimate the losses in the impactor, to characterise the size distributions of the different species and to obtain information on the main aerosol sources acting on the studied area.

Keywords

MOUDI, aerosol size-distributions, sizesegregated composition, losses in impactor

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TC19 - Environmental Measurements

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