Natural radioactivity levels in lake sediment samples

Abstract

The radioactivity concentrations of nuclides (238)U, (232)Th and (40)K in lake sediments collected from 15 different stations at Altınkaya dam lake and 12 different stations at Derbent dam lake in Turkey were measured using high-resolution gamma-ray spectrometry. The measurement was done using a coaxial HPGe detector system coupled to the Ortec-Dspect jr digital MCA system. The average measured activity concentrations of the nuclides (238)U, (232)Th and (40)K were found to be 19.5, 27.7 and 460 Bq kg(-1) in Altınkaya dam, whereas the activity concentrations were 18.8, 25.5 and 365 Bq kg(-1) in Derbent dam, respectively. The measured activity concentrations in the present study have been compared with similar measurements from different locations in the world.

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

“…The activity concentrations of 226 Moreover, the comparison of mean activity concentrations of the present study with published results in sediment samples is shown in Table 3. The 226 Ra activity concentrations reported in the Van Lake [1], the Metiterranean Central Basin [19], the Altınkaya Dam Lake [8], the Derbent Dam Lake [8], the Kızılırmak Delta [11] and the Yangtze Estuary [20] are higher than our values, but those for the Deriner, Borçka and Muratlı Dam Lakes [10] and the Vaigai River [21] are not.…”

“…In addition, radionuclides accumulating in the lake contaminate the water environment in which they are in contact. Dam waters are frequently used to irrigate agricultural lands located in the nearby area and therefore the determination of radioactive pollution in sediment samples in lake environment shows the importance of this research study [8].…”

“…To determine radioactivity levels at the dam lake and river sediments, some investigations have been carried out in Turkey [1,[8][9][10][11]. However, the studies conducted to determine the radioactivity levels of the sediment samples of the Dam lakes are limited in Turkey.…”

Levels and effects of natural radionuclides in sediment banks of Rhumel River (Northeast Algeria)

“…The knowledge of radionuclides distributions in the sediments acts an essential part in monitoring of environmental contamination and assessment of radiological hazard arising from natural sources. For this purpose, in the recent years many studies give an importance to the measurements of the activity concentrations of natural radionuclides and their hazard on human health [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Late Paleozoic–Early Mesozoic granitoids in the Khangay–Khentey basin, Central Mongolia: Implication for the tectonic evolution of the Mongol–Okhotsk Ocean margin

“…These granitoids have high Lu/Hf ratios of 0.07 to 0.11, i.e. similar to those of meta-sedimentary rocks, 0.09 to 0.11 (Eroğlu et al, 2013), suggesting the participation of sediments. The crustal extension could involve sediments into magma generation, and change the proportion of Hf and Nd isotopes in the melt.…”