Spatial distribution and risk assessment of radioactivity and heavy metal levels of sediment, surface water and fish samples from Lake Van, Turkey


Erentürk S. , YUŞAN S., Türközü D. A. , Camtakan Z. , ÖLGEN M. K. , ASLANİ M. A. A. , ...More

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, vol.300, no.3, pp.919-931, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 300 Issue: 3
  • Publication Date: 2014
  • Doi Number: 10.1007/s10967-014-3042-0
  • Title of Journal : JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
  • Page Numbers: pp.919-931
  • Keywords: Lake, Natural radioactivity, Sediment, Surface water, Fish, Gross alpha/gross beta, NATURAL RADIONUCLIDES, CS-137, SOIL, ENVIRONMENT, URANIUM, PB-210, RIVER

Abstract

In this study, radioactivity levels of 228 lake water samples, 63 upper and depth sediment samples and 12 fish samples from Lake Van were investigated from 2005 to 2008 and the distribution patterns of the radionuclides were presented. Analysis included gross alpha-beta and total radium isotopes activities and uranium concentrations of the water, and gross alpha and gross beta activities and relevant U-238, Th-232 and K-40 activity of the sediment and fish samples of the lake. Mean gross alpha, gross beta and radium isotopes activities of lake water were found 0.74 +/- A 0.46, 0.02 +/- A 0.01 and 0.06 +/- A 0.04 Bq/L, respectively. Mean gross alpha and beta activities in upper and depth sediments were found to be 41 +/- A 6 and 1,514 +/- A 74 Bq/kg; 77 +/- A 5 and 394 +/- A 24 Bq/kg at a 95 % confidence level, respectively. Mean activities of U-238, Th-232 and K-40 activity concentrations in upper and depth sediments were determined to be 225 +/- A 22, 70 +/- A 7 and 486 +/- A 39 Bq/kg; 174 +/- A 4, 63 +/- A 3 and 263 +/- A 25 Bq/kg, respectively. The mean gross alpha and beta, U-238, Th-232 and K-40 aktivities in fish samples were established as 47 +/- A 18, 470 +/- A 12, 0.57 +/- A 0.220, 0.022 +/- A 0.006, 319 +/- A 11 Bq/kg, respectively. The transfer factor from lake water to fish tissues, annual intake by humans consuming fish, and annual committed effective doses were estimated and evaluated.