Characterisation Of Inhalable
Atmospheric Aerosols
Author(s)
N. A. Kgabi, J. J. Pienaar & M. Kulmala
Abstract
A better understanding of the chemical constituents of ambient particles is
fundamental in bridging the knowledge gap between the air quality and its health
effects. In this study, Inductively Coupled Plasma Mass Spectroscopy (ICP-MS),
Atomic Absorption Spectrometry (AAS) and Scanning Electron Microscopy
coupled with Energy Dispersive Spectrometry (SEM/EDS) were used to
characterise the inhalable atmospheric particulate matter (PM10). About 30
elements were identified using ICP-MS and the mean concentrations of Cr, Ni, V
and Pb for the sites RMINE and RCBD were found to be 2.55(±1.42) and
0.18(±0.08), 1.41(±0.73) and 0.13(±0.07), 0.28(±0.12) and 0.03(±0.01), and
0.35(±0.15) and 0.48(±0.28) µg/m3 respectively. SEM/EDS yielded information
on most crustal elements and their total oxides but could not detect Ni, V and Pb.
The Cr concentrations at the two sites in the Rustenburg municipality were
measured as 2.28(±0.64) and 0.14(±0.04) µg/m3. AAS yielded the toxic metal
concentrations of 1.03(±0.54) and 1.52(±0.56) for Cr, 0.29(±0.09) and
0.58(±0.23) for Ni, 1.37(±1.02) and 1.38(±0.59) for V, and 1.32(±0.27) and
1.31(±0.57) µg/m3 for Pb. All the methods used could not give unambiguous
information on specific oxides of metals.
Keywords: particulate matter, ICP-MS, SEM/EDS, AAS.
Keywords
particulate matter, ICP-MS, SEM/EDS, AAS.
Related Book
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