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Chemical, magnetic and Mössbauer effect analysis of road dust from expressway

Szumiata T., Gawroński M., Górka B., Brzózka K., Świetlik R., Trojanowska M., Strzelecka M.

Nukleonika

2013

Vol. 58, No. 1

109-112

Environmental dusts of urban and industrial origin are one of the most important factors responsible for air and soil pollution - mainly because of heavy metals content. In this work a dust collected from the acoustic barriers of E-77 expressway (Poland) has been investigated. Chemical analysis was performed by means of atomic absorption spectrometer with flame atomization (F-AAS). Fe, Al and Zn metals dominate in the investigated road dusts. Mossbauer spectra collected at room temperature enabled the identification of several iron-containing phases in the dust. Some traces of hematite and magnetite have been found as well as alfa-Fe phase in ferromagnetic state. A significant component could be interpreted as pure iron in paramagnetic state. The dominating doublet in the spectrum of high quadrupole splitting could correspond to iron carbonates. Complementary measurements of low-field AC magnetic susceptibility confirmed a different metal content in the road dust samples collected from different altitudes of acoustic barriers.