Atmospheric selenium in an industrialized area of Portugal

M. C. Freitas; M. M. Farinha; A. M. G. Pacheco; M. G. Ventura; S. M. Almeida; M. A. Reis

doi:10.1007/s10967-005-0647-3

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 263: Issue 3

Atmospheric selenium in an industrialized area of Portugal

Authors:

M. C. Freitas

M. C. Freitas ITN-Instituto Tecnológico e Nuclear Apartado 21, E.N.10, 2686-953 Sacavém, Portugal

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M. M. Farinha

M. M. Farinha ITN-Instituto Tecnológico e Nuclear Apartado 21, E.N.10, 2686-953 Sacavém, Portugal

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A. M. G. Pacheco

A. M. G. Pacheco CVRM - Instituto Superior Técnico Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal

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M. G. Ventura

M. G. Ventura ITN-Instituto Tecnológico e Nuclear Apartado 21, E.N.10, 2686-953 Sacavém, Portugal

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S. M. Almeida

S. M. Almeida ITN-Instituto Tecnológico e Nuclear Apartado 21, E.N.10, 2686-953 Sacavém, Portugal

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M. A. Reis

M. A. Reis ITN-Instituto Tecnológico e Nuclear Apartado 21, E.N.10, 2686-953 Sacavém, Portugal

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Pages:: 710–720

Online Publication Date:: 24 Mar 2005

Publication Date:: 17 Feb 2005

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-005-0647-3

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Summary

Selenium is determined by instrumental neutron activation analysis (INAA), based on measurement of the long-lived ⁷⁵Se nuclide. In the urban and industrialized areas of Portugal selenium contents have been found of the order of of 0.5-1 ng/m³ in PM10 and PM2.5, according to the data collected since 1994. From November 12, 2001 and for not more than 3 months, the Se contents in PM10 and PM2.5 increased by a factor of 1000 in the northern area of Lisbon. More than other nutrients, selenium illustrates the dichotomy between essentiality and toxicity. There is no legislation on Se for ambient air and on indoor ambient point threshold limit values (US and Germany legislation), were 100 times higher than the abnormal values found that winter. The increase was also visible for mercury although not to such an extent. Attempts were made to understand the trend, going into a study of the emission sources located in the area using both INAA and PIXE. It was concluded that the observation occurred due to abnormal meteorological wind direction, which pushed the pollutants towards the populated area, when usually they flow into the Tagus estuary.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)