Sulphur speciation of PM10 samples by XANES spectroscopy |
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Authors: | Federico Cozzi Italo Pellegrini Gianpiero Adami Edoardo Reisenhofer Massimo Bovenzi Pierluigi Barbieri |
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Institution: | (1) Department of Chemical Sciences, University of Trieste, 34127 Trieste, Italy;(2) Regional Agency for Environmental Protection, Friuli-Venezia Giulia, Province of Trieste, 34139 Trieste, Italy;(3) Clinical Unit of Occupational Medicine, Department of Public Health Sciences, University of Trieste, Centro Tumori, 34129 Trieste, Italy |
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Abstract: | Sulphur K-edge X-ray absorption near edge structure (XANES) spectroscopy was used to identify sulphur compounds in PM10 samples
collected simultaneously at two sites with different environmental situations in the province of Trieste (NE of Italy), during
summer and winter seasons respectively. The first site is an industrial site located near a steel mill plant and the second
is a coastal site. The sulphur speciation at the industrial site has shown the presence of the following sulphur compounds
in both seasons: organic compounds (thiophenes or Polycyclic Aromatic Sulphur Heterocycles — PAHs) and sulphates while in
the winter season sulphites were also present. In the coastal site organic compounds (thiophenes or PASHs) and sulphate were
found during winter season, moreover bisulphates were found during summer season. Relative percentages of the different sulphur
compounds have shown that sulphate is the most abundant form of sulphur in the industrial site samples during both seasons
and in the coastal site sample collected during the winter season (> 98%); in the coastal site sample collected during the
summer season the relative percentages of bisulphate and sulphate were around 40% and 60% respectively.
![MediaObjects/11532_2009_52_Fig1_HTML.jpg](/content/q3654m42633vj831/MediaObjects/11532_2009_52_Fig1_HTML.jpg) |
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Keywords: | Synchrotron radiation Industrial pollution Steel mill Thiophenes PASHs sulphites |
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