Natural and artificial nuclides in Salesópolis reservoir
DOI:
https://doi.org/10.15392/bjrs.v7i2A.657Keywords:
Salesópolis, natural radionuclides, artificial radionuclides, reservoirAbstract
Natural radioactivity is ubiquitous in the environment mainly due to the presence of the nuclides from the uranium and thorium series and 40K. Although in the South Hemisphere nuclear tests have been fewer in number than that in the North, artificial radionuclides can also be found spread at ground level. In this study, the activity concentrations of natural nuclides from the uranium and thorium series, 40K and the artificial 137Cs were determined in a sediment core with 42 cm depth collected in the middle of the Salesópolis reservoir, located in the Metropolitan Region of São Paulo city (SPMR). The Usina Parque Rio Tietê reservoir belongs to the Alto do Tietê system for the capture, storage and treatment of water for SPMR. Therefore, the quality of the water and sediments of this dam is of great importance. The activity concentrations were measured by gamma spectrometry. Samples were measured and saved at regular intervals at a maximum of 160 000 seconds. The gross area were determined for each peak and plotted against time and the counting rate was obtained by the slope of the curve. Background and reference materials were also counted and treated in the same way. Results showed that 226Ra varied from 45 to 116 Bq kg-1; 228Ra, from 80 to 165 Bq kg-1; 40K, from 155 to 1 187 Bq kg-1 and 137Cs varied from 0.3 to 7 Bq kg-1. The methodology applied for determining low levels of 137Cs in sediment proved to be efficient and reproducible.- Views: 138
- PDF Downloads: 120
Downloads
References
IAEA. Radiation, People and Environment. International Atomic Energy Agency, Viena, Austria, (2004).
P. A. L. Ferreira, P. A. Neves, R. C. L. Figueira, Evaluation of recent sedimentation rates in Guajará Bay (in Brasilina cost) with 210Pb and 137Cs. International Nuclear Atlantic Conference - INAC 2013, Recife, PE, Brazil, November 24 - 29, (2013).
F. M. Carvalho, D. C. Lauria, F. C. A. Ribeiro, R. T. Fonseca, S. S. Peres, N. S. F. Martins, “Natural and man-made radionuclides in sediments of an inlet in Rio de Janeiro State, Brazil”, Ma-rine Pollution Bulletin, 107, pp. 269 - 276 (2016).
F. Caridi, S. Marguccio, A. Belvedere, G. Belmusto, “Measurements of Gamma Radioac-tivity in River Sediment Samples of the Mediterranean Central Basin”, American Journal of Con-densed Matter Physics, 5(3), pp. 61- 68 (2015).
R. C. L. Figueira, R. L. N. Silva, A. M. G. Figueiredo, I. I. L. Cunha, Instrumental analysis by gamma spectrometry of low level caesium-137 in marine samples. Proceedings of an International Conference, Goiania, Brazil, 26 - 31 octouber, pp. 329 – 337 (1997).
UNSCEAR. Sources and Effects of Ionizing Radiation. Volume I: Effects. UNSCEAR 2008 Report. United Nations Scientific Committee on the Effects of Atomic Radiation, Report to the General Assembly, with scientific annexes. United Nations sales publication E.00.IX.4. United Nations, New York (2010).
V. L. B. Souza, K. R. G. Rodrigues, E. H. Pedroza, R. T. Melo, V. L. Lima, C. A. Hazin, M. G. O. Almeida, R. K. Nascimento, “Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil”, Sustainability, 4, pp. 2419 - 2429 (2012).
L. M. Sanders, C. J. Sanders, W. Luiz-Silva, W. Machado, E. V. Silva-Filho, S. R. Patchi-neelam, “Anthropogenic source assessment of 226Ra and 210Pb in a sediment core from the Cu-batão River estuary (SE Brazil)”, Journal of Radioanalytical and Nuclear Chemistry, 287(3), pp. 729 - 732 (2011).
P. S. C. Silva, B. P. Mazzilli, D. I. T. Fávaro, “Distribution of radionuclides and elements in Cubatão River sediments”, Journal of Radioanalytical and Nuclear Chemistry, 269 (3), pp. 767 - 771 (2006).
L. M. Cordero, R. C.L. Figueira, M. M. Mahiques, M. G. Tessler, “Natural radionuclides distribution in the shelf and upper slope off Southeast Brazil”. International Nuclear Atlantic Con-ference – INAC, Rio de Janeiro,RJ, Brazil, September 27 to October 2, pp. 1 – 7 (2009).
R. T. Saito, Radionuclídeos (210Pb, 226Ra, 210Po e 137Cs) no sistema costeiro Canaéia-Iguape: estudos ambientais. Doctorate Thesis IPEN, (2002). (in portuguese).
A. Baeza, J. Guillén, M. A. Ontalba Salamanca, A. Rodríguez, F. J.Ager, “Radiological and multi-element analysis of sediments from the Proserpina reservoir (Spain) dating from Roman times”, Journal of Environmental Radioactivity, 100, pp. 866 - 874 (2009).
S. Sugandhi, V. M. Joshi, P. M. Ravi, “Studies on natural and anthropogenic radionuclides in sediment and biota of Mumbai Harbour Bay”, J Radioanal Nucl Chem, 300, pp. 67 - 70 (2014).
A. B. Slimane, D. Raclot, O. Evrard, M. Sanaa, I. Lefèvre, M. Ahmadi, M. Tounsi, C. Rumpel, A. B. Mammou, Y. Bissonnais, “Fingerprinting sediment sources in the outlet reservoir of a hilly cultivated catchment in Tunisia”, J Soils Sediments, 13, pp. 801 - 815 (2013).
R. Tošić, D. J. Todorović, S. S. Dragićević, I. S. Bikit, S. Forkapić, B. Blagojević, “Radio-activity and measurements of sediment deposition rate of the Drenova Reservoir (B&H)”, Nuclear Technology & Radiation Protection, 27 (1), pp. 52 - 56 (2012).
X. Lu, H. Pan, C. Ren, L. Yang, “Natural radioactivity in reservoir sediment near an indus-trial park of northwest China”, J Radiol Prot, 36, pp. N26 - N33 (2016).
K. Szarlowicz, W. Reczynski, R. Misiak, B. Kubica, “Radionuclides and heavy metal oncentrations as complementary tools for studying the impact of industrialization on the environ-ment”, J Radioanal Nucl Chem, 298, pp. 1323 - 1333 (2013).
K. Szarlowicz, B. Kubica, “137Cs and 210Pb radionuclides in open and closed water eco-systems”, J Radioanal Nucl Chem, 299, pp. 1321 - 1328 (2014).
F. Kuilahcıa, Z. Șen, “Multivariate statistical analyses of artificial radionuclides and heavy metals contaminations in deep mud of Keban Dam Lake, Turkey”, Applied Radiation and Isotopes, 66, 236 - 246 (2008).
I. R. Santos, W. C. Burnett, J. M. Godoy, “Radionuclides as tracer of coastal processes in Brazil: review, synthesis, and perspectives”, Brazilian Journal of Oceanography, 56(2), 115 - 131, (2008).
I. D.L. Foster, J. Boardman, J. Keay-Bright, “Sediment tracing and environmental history for two small catchments, Karoo Uplands, South Africa”, Geomorphology, 90, 126 - 143 (2007).
Published
How to Cite
Issue
Section
License
Copyright (c) 2021 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
