• A Preliminary Study for the Analytical Method and Environmental Characteristics of Radium-226 in Groundwater
  • Jeong, Do-Hwan;Kim, Moon--Su;Noh, Hoe-Jung;Yoon, Yoon-Yeol;Kim, Dong-Soo;Lee, Young-Joon;Ju, Byoung-Kyu;Hong, Jung-Ki;Kim, Tae-Seung;
  • National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;Korea Institute of Geoscience and Mineral Resources;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;
  • 지하수 중 라듐-226의 분석방법 및 환경 특성에 관한 예비 연구
  • 정도환;김문수;노회정;윤윤열;김동수;이영준;주병규;홍정기;김태승;
  • 국립환경과학원;국립환경과학원;국립환경과학원;한국지질자원연구원;국립환경과학원;국립환경과학원;국립환경과학원;국립환경과학원;국립환경과학원;
Abstract
$^{226}Ra$ in groundwater could be analyzed by various methods. LSC (liquid scintillation counter) is used to measure its activity of Ba co-precipitates with Hisafe III scintillation cocktail solution. Counting efficiency was obtained using NIST $^{226}Ra$ standard solution in triplicate and calculated $^{226}Ra$ concentration using the efficiency values. $^{226}Ra$ values of 19 groundwaters having Gross-${\alpha}$ concentrations of more than 5 pCi/L ranged from ND (${\leq}$ 0.1 pCi/L) to 1.18 pCi/L. Geologic settings of the 19 areas are composed of granitic rocks of Pre-Cambrian and Jurassic and Cretaceous, gneiss (schist) of Pre-Cambrian, and volcanic rocks of Cretaceous. No relationship was shown among $^{226}Ra$ a concentrations and in-situ water quality data, and Gross-${\alpha}$, uranium, radon concentrations.

Keywords: $^{226}Ra$;LSC;Gross-${\alpha}$;Uranium;Geologic setting;

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