Radioactivity and hydrochemical properties of certain thermal Turkish spa waters.
J Water Health. 2017 Aug;15(4):591-601
Authors: Karakaya MÇ, Doğru M, Karakaya N, Kuluöztürk F, Nalbantçılar MT
The study aims to determine the radioactivity levels of thermal waters which have been used seasonally or permanently in spas for therapeutic intentions. Samples were collected from spas in different regions of Turkey. Some radionuclides ((40)K, (232)Th, (226)Ra, (137)Cs), gross alpha (GA) and gross beta (GB) activities, and physical and some chemical parameters were measured. Gamma radiation measurements for (226)Ra, (232)Th and (40)K radionuclides were performed by using a high purity germanium (HPGe) detector. The results of the gamma spectrometry ranged from 1.385 to 11.025 Bql(-1) for (226)Ra, <minimum detectable activity to 3.477 Bql(-1) for (232)Th and 9.679 to 36.989 Bql(-1) for (40)K. GA and GB activity concentrations were detected by using ultra-low level α/β counter. The GA and GB activity ranged from 43 to 3,182 mBql(-1) and 54 to 1,950 mBql(-1), respectively. Based on calculated annual effective dose equivalent, the total dose originated mostly from (226)Ra and slightly from (40)K. Furthermore, waters with high Cl content were enriched with (40)K, (226)Ra isotopes, and the source of GA and GB activity in these waters was mostly (226)Ra. Strong high positive correlation between Cl, (226)Ra and total dissolved solids in Cl-enriched samples indicated that the nuclides formed from dissolved minerals in these waters.
PMID: 28771156 [PubMed - indexed for MEDLINE]