دورية أكاديمية
Natural radioactivity in soils of the state of Rio de Janeiro (Brazil): Radiological characterization and relationships to geological formation, soil types and soil properties.
| العنوان: | Natural radioactivity in soils of the state of Rio de Janeiro (Brazil): Radiological characterization and relationships to geological formation, soil types and soil properties. |
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| المؤلفون: | Ribeiro FCA; Institute of Radiation Protection and Dosimetry (IRD), Brazilian National Commission on Nuclear Energy (CNEN), Av. Salvador Allende, s/n, Barra da Tijuca, Rio de Janeiro, RJ 22783-127 Brazil. Electronic address: fribeiro@ird.gov.br., Silva JIR; Institute of Radiation Protection and Dosimetry (IRD), Brazilian National Commission on Nuclear Energy (CNEN), Av. Salvador Allende, s/n, Barra da Tijuca, Rio de Janeiro, RJ 22783-127 Brazil. Electronic address: jivan@ird.gov.br., Lima ESA; Department of Soils, Institute of Agronomy, Federal Rural University of Rio de Janeiro (Universidade Federal Rural do Rio de Janeiro-UFRRJ), Rodovia BR 465, Km 07, s/n, Seropédica, RJ 23890-000, Brazil. Electronic address: ericaabreulima@gmail.com., do Amaral Sobrinho NMB; Department of Soils, Institute of Agronomy, Federal Rural University of Rio de Janeiro (Universidade Federal Rural do Rio de Janeiro-UFRRJ), Rodovia BR 465, Km 07, s/n, Seropédica, RJ 23890-000, Brazil. Electronic address: nmbdas@gmail.com., Perez DV; National Centre of Soil Research (CNPS), Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Rua Jardim Botânico, nº 1024, Bairro Jardim Botânico, Rio de Janeiro, RJ 22460-000, Brazil. Electronic address: daniel.perez@embrapa.br., Lauria DC; Institute of Radiation Protection and Dosimetry (IRD), Brazilian National Commission on Nuclear Energy (CNEN), Av. Salvador Allende, s/n, Barra da Tijuca, Rio de Janeiro, RJ 22783-127 Brazil. Electronic address: dejanira@ird.gov.br. |
| المصدر: | Journal of environmental radioactivity [J Environ Radioact] 2018 Feb; Vol. 182, pp. 34-43. Date of Electronic Publication: 2017 Nov 25. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8508119 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1700 (Electronic) Linking ISSN: 0265931X NLM ISO Abbreviation: J Environ Radioact Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Barking, Essex : Elsevier Applied Science Publishers, |
| مواضيع طبية MeSH: | Radiation Monitoring*, Soil/*chemistry , Soil Pollutants, Radioactive/*analysis, Background Radiation ; Brazil ; Potassium Radioisotopes/analysis ; Radioactivity ; Radium/analysis ; Thorium/analysis |
| مستخلص: | Located in the south-western part of Brazil, the state of Rio de Janeiro is geotectonically contained within a complex structural province that resulted in the amalgamation of the Western Gondwana Paleocontinent. To undertake an extensive radiological characterization of this complex geological province and investigate the influence of bedrock, soil type and soil chemical-physical characteristics on natural radionuclide levels in soils, 259 surface soil samples were collected that encompassed the main soil types and geological formations throughout the state. Gamma spectrometry analysis of the samples resulted in median values of 114 Bq.kg -1 for 40 K, 32 Bq.kg -1 for 226 Ra and 74 Bq.kg -1 for 228 Ra. The median value for 226 Ra was similar to the world median value for soils, the 40 K value was well below the worldwide value, and that for 228 Ra exceeded the world median value. The intense weathering caused by the high rainfall rates and high temperatures may be responsible for the low levels of 40 K in the soils, of which the strongly acidic and clayey soils are markedly K-depleted. A soil from a high-grade metamorphic rock (granulite) presented the lowest 226 Ra (18 Bq.kg -1 ) content, whereas the highest levels for 226 Ra (92 Bq.kg -1 ) and 228 Ra (139 Bq.kg - 1) were observed in a young soil enriched in primary minerals (Leptsol). A lowland soil (Gleysol) showed the highest median of 40 K (301 Bq.kg -1 ). Strongly acidic soils tended to present high amounts of 226 Ra, and sandy soils tended to contain low levels of 228 Ra. The external radiation dose indicates that the state has a background radiation level within the natural range. (Copyright © 2017 Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Natural radionuclides; Radioactivity mapping; Soil |
| المشرفين على المادة: | 0 (Potassium Radioisotopes) 0 (Soil) 0 (Soil Pollutants, Radioactive) 60YU5MIG9W (Thorium) W90AYD6R3Q (Radium) |
| تواريخ الأحداث: | Date Created: 20171129 Date Completed: 20171228 Latest Revision: 20171228 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1016/j.jenvrad.2017.11.017 |
| PMID: | 29182917 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1700 |
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| DOI: | 10.1016/j.jenvrad.2017.11.017 |