Approximate total Fe content determined by Mössbauer spectrometry: Application to determine the correlation between gamma-ray-emitter activities and total content of Fe phases in soils of the Province of Buenos Aires, Argentina

Autor: Roberto C. Mercader, Patricia C. Rivas, María Luciana Montes, Marcela Andrea Taylor
Rok vydání: 2016
Předmět:
Soil test
MÖSSBAUER SPECTROSCOPY
Health
Toxicology and Mutagenesis
Iron
Analytical chemistry
Argentina
02 engineering and technology
SOIL NATURAL RADIOACTIVITY
010501 environmental sciences
engineering.material
01 natural sciences
Ciencias de la Tierra y relacionadas con el Medio Ambiente
symbols.namesake
Soil
Spectroscopy
Mossbauer
Phase (matter)
Mössbauer spectroscopy
Environmental Chemistry
Soil Pollutants
Radioactive
Waste Management and Disposal
0105 earth and related environmental sciences
Mossbauer spectrometry
Radionuclide
Chemistry
General Medicine
021001 nanoscience & nanotechnology
TOTAL FE FRACTIONS
Pollution
Pearson product-moment correlation coefficient
CORRELATION COEFFICIENTS
Illite
Soil water
symbols
engineering
Meteorología y Ciencias Atmosféricas
0210 nano-technology
CIENCIAS NATURALES Y EXACTAS
Zdroj: Journal of environmental radioactivity.
ISSN: 1879-1700
Popis: Pearson correlation coefficients between 40K, 226Ra and 232Th activities and the total Fe phase fractions yielded by Mössbauer spectroscopy have been calculated for soils of the Province of Buenos Aires, Argentina. Total fractions of Fe phases have been obtained from the relative fractions reported in previous works weighted by the Fe soil content and the recoilless-fraction of each Fe phase. An approximate method based on the relationship between the Mössbauer spectral absorption area (obtained from the 57Fe Mössbauer data) and the total Fe concentration (determined by colorimetric methods, after microwave assisted acid digestion of soil samples) has been used for the first time to determine the Fe concentration in soils with an accuracy of 15%. Protocol to extend the method for unknown samples is also discussed. The determined new coefficients differ from those reported previously. A significant and positive correlation between the total fraction of Fe2+ and the 40K activity values has been obtained. This result validates the hypothesis put forward in a previous work, i.e., that illite captures the 40K existing in the soil. In addition, with the new approximation, the Pearson correlation coefficients for the other natural radionuclides give values that indicate that the methodology reported here is appropriate to study the correlations between the activity values with the total fractions of Fe phases. Fil: Montes, María Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina Fil: Rivas, Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina Fil: Taylor, Marcela Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina Fil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina
Databáze: OpenAIRE
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