Distribution of radionuclides and elements in Cubatão River sediments

P. S. C. Silva; B. P. Mazzilli; D. I. T. Fávaro

doi:10.1007/s10967-006-0258-7

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 269: Issue 3

Distribution of radionuclides and elements in Cubatão River sediments

Authors:

P. S. C. Silva

P. S. C. Silva Instituto de Pesquisas Energéticas e Nucleares, Centro de Metrologia das Radiaç?es, Laboratório de Radiometria Ambiental Av. Prof. Lineu Prestes 2242, 05508-900 S?o Paulo, Brazil

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B. P. Mazzilli

B. P. Mazzilli Instituto de Pesquisas Energéticas e Nucleares, Centro de Metrologia das Radiaç?es, Laboratório de Radiometria Ambiental Av. Prof. Lineu Prestes 2242, 05508-900 S?o Paulo, Brazil

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D. I. T. Fávaro

D. I. T. Fávaro Instituto de Pesquisas Energéticas e Nucleares, Centro do Reator de Pesquisas, Laboratório de Análise por Ativaç?o Neutrônica Av. Prof. Lineu Prestes 2242, 05508-900 S?o Paulo, Brazil

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Pages:: 767–771

Online Publication Date:: 15 Sep 2006

Publication Date:: 17 Sep 2006

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-006-0258-7

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Summary

Cubatão River is located in Santos Basin, São Paulo State, Brazil. This region is characterized by the occurrence of estuaries and mangrove. Due to its location, near the coastal line, it is also an important industrial area, where phosphate fertilizer plants, petrol refineries, and chemical and steel industries are present. Such human activities contribute to the enhancement of elemental composition in sediments and, in some cases, also increase the radionuclide concentrations, the so called Technologically Enhanced Natural Occurring Radioactive Materials (TENORM). The contamination of land and sediments by TENORM is of major concern. The activity concentration of U and Th series radionuclides was determined in five sediment samples from Cubatão River. The activity concentration ratio was also determined. Equilibrium was observed for the ratio ²³⁴U/²³⁸U. The activity ratios of Th/²³⁸U, ²²⁸Ra/²²⁶Ra and ²¹⁰Pb/²²⁶Ra were higher than the unity. In the first two cases, the observed values are due to the higher activity of Th in the sediment and in the last case are probably due to the atmospheric deposition of ²¹⁰Pb.

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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)