دورية أكاديمية
Alternatives to 137 Cs for 210 Pb dating validation in south America and in the Carribean region: Point and diffuse sources.
| العنوان: | Alternatives to 137 Cs for 210 Pb dating validation in south America and in the Carribean region: Point and diffuse sources. |
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| المؤلفون: | Godoy JM; Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, RJ, Brazil. Electronic address: jmgodoy@puc-rio.br., Massone CG; Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, RJ, Brazil., Carreira RS; Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, RJ, Brazil., Wagener AR; Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, RJ, Brazil., Carvalho F; Instituto de Radioproteção e Dosimetria, Comissão Nacional de Energia Nuclear, Av. Salvador Allende s/n, CEP 22780-160, Rio de Janeiro, RJ, Brazil. |
| المصدر: | Journal of environmental radioactivity [J Environ Radioact] 2024 Sep; Vol. 278, pp. 107489. Date of Electronic Publication: 2024 Jul 15. |
| 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: | Cesium Radioisotopes*/analysis , Radiation Monitoring*/methods , Lead Radioisotopes*/analysis, Water Pollutants, Radioactive/analysis ; South America ; Brazil ; Geologic Sediments/chemistry ; Radiometric Dating/methods |
| مستخلص: | As today the 137 Cs fallout peak, in sediment cores, corresponds only to 25% of its initial concentration, alternatives to the use of 137 Cs as a 210 Pb sediment dating validation tool are proposed. In highly industrialized bays, such as Guanabara Bay in the Rio de Janeiro metropolitan region, several chemical/compounds from the surrounding industry releases may be applied as validation tools. Chromium and copper profiles in a sediment core adequately fit the expected pattern due to the implementation of a chemical plant in 1958, reaching their maximum discharge in 1982 and subsequently decreasing due to the operation of a new wastewater treatment plant. A diffuse source such, as the PCB-based mixture Askarel, was also applied as an alternative validation tool, and the observed concentration profile reproduced the expected behavior, with increasing concentration after the Second World War and a decrease after the ban of this product in 1981. The observed Aroclor 1254 and 1260 mixture chlorination rates fit the most widely distributed PCB-based products in the country. Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2024 Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: (210)Pb dating; Guanabara bay; PCB; Trace elements |
| المشرفين على المادة: | 0 (Cesium Radioisotopes) 0 (Lead Radioisotopes) 0 (Water Pollutants, Radioactive) 4T2E65IAR7 (Cesium-137) 0 (Lead-210) |
| تواريخ الأحداث: | Date Created: 20240716 Date Completed: 20240820 Latest Revision: 20240820 |
| رمز التحديث: | 20240821 |
| DOI: | 10.1016/j.jenvrad.2024.107489 |
| PMID: | 39013309 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1700 |
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| DOI: | 10.1016/j.jenvrad.2024.107489 |