Abstract
The objectives of this work were to develop a means of sampling atmospheric dusts on the premises of an oil refinery for electron microscopic study to carry out preliminary morphological analyses and to compare these dusts with those collected at sites beyond the refinery limits. Carbon and collodion membranes were used as a support for collection of dust particles straight on transmission electron microscopy (TEM) grids. Micrographs of the dust particles were taken at magnifications from ×4,000 to ×80,000 with a Tesla BS500 transmission electron microscope. Four parameters were defined on the basis of the micrographs: surface area, Feret diameter, circumference, and shape coefficient. The micrographs and literature data were used to classify the atmospheric dusts into six groups: particles with an irregular shape and rounded edges; particles with an irregular shape and sharp edges; soot and its aggregates; spherical particles; singly occurring, ultrafine dust particles; and particles not allocated to any of the previous five groups. The types of dusts found in all the samples were similar, although differences did exist between the various morphological parameters. Dust particles with the largest Feret diameter were present in sample 3 (mean, 0.739 μm)—these were collected near the refinery's effluent treatment plant. The particles with the smallest diameter were found in the sample that had been intended to be a reference sample for the remaining results (mean, 0.326 μm). The dust particles collected in the refinery had larger mean Feret diameters, even 100% larger, than those collected beyond it. Particles with diameters from 0.1 to 0.2 μm made up the most numerous group in all the samples collected in the refinery.
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Published in the special issue Focus on Analytical Science in Poland (VIIIth Polish Conference on Analytical Chemistry) with Guest Editor Pawel Koscielniak.
An erratum to this article can be found online at http://dx.doi.org/10.1007/s00216-013-7285-3.
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Sielicki, P., Janik, H., Guzman, A. et al. Oil refinery dusts: morphological and size analysis by TEM. Anal Bioanal Chem 399, 3261–3270 (2011). https://doi.org/10.1007/s00216-010-4416-y
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DOI: https://doi.org/10.1007/s00216-010-4416-y