engleski

Seasonal variations in particulate mass concentrations and elemental composition of urban aerosols in Zagreb, Croatia, using ED(P)XRF analysis

Significant efforts in time, instrumentation, expertise, and money are required in aerosol sampling and data generation. It is therefore unfortunate to focus mainly on mass concentration measurements in air pollution studies. Subsequent and additional determination of the chemical composition of aerosol particles is needful, and of interest in deriving maximum information from collected aerosols [1]. Particle mass concentrations of suspended particulates in an urban residential area in Zagreb, Croatia, have been determined using the Gent air sampler at an average flow rate of 1 m3/h. Twenty four hour samples were collected during the periods July – September 2007, and December 2007 – January 2008, and the mass concentrations for coarse and fine particle fractions have been determined and compared for the two seasons. This was followed by elemental composition analysis using energy dispersive polarized x-ray fluorescence (ED(P)XRF) spectrometry, with four secondary/polarizing excitation targets [2]. Also presented and compared, are the elemental concentration results of the following identified elements: Al, Si, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Cu, Zn, Pb, and Br. This paper also discusses the seasonal influences on the particulate and elemental concentration levels.

elemental composition; airborne particulates

nije evidentirano