Activity concentration of terrestrial and anthropogenic radionuclides (Ra-226, Rn-222, Th-232, K-40, and Cs-137) in soil samples

Altikulac A., TURHAN Ş., Gumus H.

ENVIRONMENTAL EARTH SCIENCES, vol.75, no.1, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 75 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.1007/s12665-015-4841-5
  • Journal Name: ENVIRONMENTAL EARTH SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Soil, Natural radioactivity, Radon, Gamma dose rate, Effective dose rate, Inhalation exposure, NATURAL RADIOACTIVITY, PROVINCE, ANATOLIA, BASIN, CITY
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Measurement of the activity concentrations of terrestrial and anthropogenic radionuclides in one hundred fifteen soil samples collected from various locations in Samsun city was taken using a gamma-ray spectrometer with a NaI (Tl) detector. The average activity concentrations of terrestrial radionuclides Ra-226, Th-232, and K-40 were measured as 38.1 +/- 1.4, 39.3 +/- 0.8, and 375.3 +/- 10.2 Bq kg(-1), respectively. The average activity concentration of anthropogenic radionuclide Cs-137 measured in some soil samples was found as 12.1 +/- 0.7 Bq kg(-1). Radon concentrations in soil and in air were estimated using results of the measurement of activity concentrations of Ra-226. The average concentrations of radon in soil and air were found as 32 kBq m(-3) and 101 Bq m(-3), respectively. The absorbed gamma dose rate in outdoor air due to terrestrial radionuclides in soil samples varied from 28 to 95 nGy h(-1) with an average of 57 nGy h(-1). The annual effective dose rates caused from external and inhalation exposure were estimated as 70 and 958 mu Sv y(-1), respectively.