Published 2017 | Version v1
Journal article Metadata-only

Radiological hazard indices and elemental composition of Brazilian and Swiss ornamental rocks

Creators

  • 1. Universidade Federal de Alfenas (UNIFAL), Pocos de Caldas, MG (Brazil)
  • 2. Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
  • 3. Universita della Svizzera Italiana (USI), Lugano (Switzerland)
  • 4. Universidade de Sao Paulo (USP), SP (Brazil)

Description

The objective of this paper was to evaluate the radiological risk index of ornamental rocks sold both in Brazil and Europe and to correlate their radioactive content with their chemical composition. The 238U, 232Th and 40K mean values were 62 ± 65, 122 ± 111, 1126 ± 516 Bq kg-1 for Brazilian and 93 ± 59, 70 ± 67 and 1005 ± 780 Bq kg-1 for Swiss samples, respectively. The radiological index: radium equivalent, external hazard index, absorbed dose rate in air, annual gonadal equivalent dose, annual effective dose equivalent, and excess lifetime cancer risk for Brazilian and Swiss samples were calculated. The main contribution for the radiological indices observed was the radionuclide 232Th, which is associated with REE, Br, Hf, Na, Rb, Sb and Zr in the rock matrix. (author)

Availability note (English)

Available from http://www.bjrs.org.br/revista/index.php/REVISTA/article/view/269/216

Additional details

Identifiers

URL
http://www.bjrs.org.br/revista/index.php/REVISTA/article/view/269/216;

Publishing Information

Journal Title
Brazilian Journal of Radiation Sciences
Journal Volume
5
Journal Issue
2
Journal Page Range
p. 1-29
ISSN
2319-0612

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
48077178
Subject category
S61: RADIATION PROTECTION AND DOSIMETRY;
Descriptors DEI
ABSORBED RADIATION DOSES; BRAZIL; GRANITES; POTASSIUM 40; RADIATION HAZARDS; RISK ASSESSMENT; ROCKS; SWITZERLAND; THORIUM 232; THORIUM 238; URANIUM 238
Descriptors DEC
ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; DEVELOPED COUNTRIES; DEVELOPING COUNTRIES; DOSES; ELECTRON CAPTURE RADIOISOTOPES; EUROPE; EVEN-EVEN NUCLEI; HAZARDS; HEALTH HAZARDS; HEAVY NUCLEI; IGNEOUS ROCKS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LATIN AMERICA; LIGHT NUCLEI; NANOSECONDS LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; PLUTONIC ROCKS; POTASSIUM ISOTOPES; RADIATION DOSES; RADIOISOTOPES; ROCKS; SOUTH AMERICA; SPONTANEOUS FISSION RADIOISOTOPES; THORIUM ISOTOPES; URANIUM ISOTOPES; WESTERN EUROPE; YEARS LIVING RADIOISOTOPES