Wet deposition and soil content of Beryllium – 7 in a micro-watershed of Minas Gerais (Brazil)
| Autor: | Rubens Martins Moreira, Jimena Juri Ayub, D.L. Valladares, Roberto Pellacani G. Monteiro, Alexander D. Esquivel L, Anômora A. Rochido Dos Santos |
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| Rok vydání: | 2017 |
| Předmět: |
Wet season
010504 meteorology & atmospheric sciences Rain Health Toxicology and Mutagenesis Soil science 010501 environmental sciences 01 natural sciences Ciencias de la Tierra y relacionadas con el Medio Ambiente Soil Radiation Monitoring Dry season Water Movements medicine Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences Radioisotopes Hydrology Acrisol ATMOSPHERIC DEPOSITION SOIL CONTENT General Medicine Seasonality Soil type medicine.disease Pollution Leaching model Deposition (aerosol physics) 7BE Soil water Environmental science Beryllium GAMMA SPECTROMETRY Meteorología y Ciencias Atmosféricas SOIL EROSION CIENCIAS NATURALES Y EXACTAS Brazil |
| Zdroj: | Journal of Environmental Radioactivity. :56-63 |
| ISSN: | 0265-931X |
| DOI: | 10.1016/j.jenvrad.2016.12.014 |
| Popis: | Beryllium-7 (7Be) is a natural radionuclide of cosmogenic origin, normally used as a tracer for several environmental processes; such as soil redistribution, sediment source discrimination, atmospheric mass transport, and trace metal scavenging from the atmosphere. In this research the content of 7Be in soil, its seasonal variation throughout the year and its relationship with the rainfall regime in the Mato Frio creek micro-watershed was investigated, to assess its potential use in estimating soil erosion. The 7Be content in soil shows a marked variation throughout the year. Minimum 7Be values were observed in the dry season (from April to September) and were between 7 and 14 times higher in the rainy season (from October to March). The seasonal oscillations in 7Be soil content could be explained by the asymmetric rainfall regime. A highly linear relationship between rainfall amount and 7Be deposition was observed in rain water. A good agreement between 7Be soil content and 7Be atmospheric deposition was noticed, mainly in wet months. 7Be penetration in soil reaches a 5 cm depth, this could be explained by the soil type in the region. The soils are Acrisol type, characterized by low pH values and clay illuviation in deeper layers of the soil. In some regions of Brazil special attention should be paid if this radionuclide will be used as soil erosion tracer, taking into account the soil origin and its particular properties. Fil: Esquivel L, Alexander D.. Universidad Tecnológica de Panamá; Panamá. Centro de Desenvolvimento da Tecnologia Nuclear; Brasil Fil: Moreira, Rubens M.. Centro de Desenvolvimento da Tecnologia Nuclear; Brasil Fil: Monteiro, Roberto Pellacani G.. Centro de Desenvolvimento da Tecnologia Nuclear; Brasil Fil: Dos Santos, Anômora A. Rochido. Pontifícia Universidade Católica de Minas Gerais; Brasil Fil: Juri Ayub, Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina Fil: Valladares, Diego Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina |
| Databáze: | OpenAIRE |
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