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

100%

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

Nukleonika

2013

tom 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.

PM2.5 elemental composition and source apportionment in a residential area of Wrocław, Poland

58%

Sówka I. , Zwoździak A. , Trzepla-Nabaglo K. , Skrętowicz M. , Zwoździak J.

Environment Protection Engineering

2012

tom Vol. 38, nr 1

73--79

Indoor PM2.5 levels have been measured in the Cerrahpasa Medical Faculty during the autumn of 2007 between September and December. PM2.5 was measured for a period of 8 h during the workday (8.30 a.m.–4.30 p.m.). The maximum PM2.5 level equal to 388.5 μg/m3 was found at the administrative building. The highest average PM2.5 was 160.1 μg/m3 measured at the waiting room of central laboratory.