Radiological Impact of Phosphogypsum Application in Agriculture

Phosphogypsum (PG) contains radionuclides from {sup 238}U and {sup 232}Th decay series. Due to the presence of these radionuclides, many countries restricted the use of PG in agriculture, however there is not such restriction in Brazil. The main objective of this work was to evaluate the impact of P...

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Hauptverfasser:	Dias, Nivea M. P., Caires, Eduardo F., Pires, Luiz F., Bacchi, Marcio A., Fernandes, Elisabete A. N.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	60 APPLIED LIFE SCIENCES ACTINIDE NUCLEI AGRICULTURE ALKALINE EARTH ISOTOPES ALPHA DECAY RADIOISOTOPES BETA DECAY RADIOISOTOPES BETA-MINUS DECAY RADIOISOTOPES BRAZIL CARBON 14 DECAY RADIOISOTOPES DECAY DEVELOPING COUNTRIES DOSES EVEN-EVEN NUCLEI GAMMA SPECTROSCOPY GE SEMICONDUCTOR DETECTORS HEAVY ION DECAY RADIOISOTOPES HEAVY NUCLEI HIGH-PURITY GE DETECTORS INTERNAL CONVERSION RADIOISOTOPES ISOTOPES LATIN AMERICA MEASURING INSTRUMENTS NUCLEAR DECAY NUCLEI RADIATION DETECTORS RADIATION DOSES RADIOISOTOPES RADIUM 226 RADIUM 228 RADIUM ISOTOPES SEMICONDUCTOR DETECTORS SOILS SOUTH AMERICA SPECTROSCOPY SPONTANEOUS FISSION RADIOISOTOPES THORIUM 232 THORIUM ISOTOPES URANIUM 238 URANIUM ISOTOPES YEARS LIVING RADIOISOTOPES
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Zusammenfassung:	Phosphogypsum (PG) contains radionuclides from {sup 238}U and {sup 232}Th decay series. Due to the presence of these radionuclides, many countries restricted the use of PG in agriculture, however there is not such restriction in Brazil. The main objective of this work was to evaluate the impact of PG application on {sup 226}Ra ({sup 238}U) and {sup 228}Ra ({sup 232}Th) concentrations in soil. Gamma-spectrometry was carried out using HPGe detector. No increment of {sup 226}Ra and {sup 228}Ra was observed for increasing PG doses. Average values found for {sup 226}Ra and {sup 228}Ra were respectively 37 Bq kg{sup -1} and 57 Bq kg{sup -1}. The results showed that the increasing PG doses in the specific conditions of the experiment did not cause a significant increment of radionuclides.
ISSN:	0094-243X 1551-7616
DOI:	10.1063/1.3480230