- Environmental Characteristics of Naturally Occurring Radioactive Materials (238U, 222Rn) Concentration in Drinking Groundwaters of Metamorphic Rock Areas: Korea
- Ju, Byoung Kyu;Kim, Moon Su;Jeong, Do Hwan;Hong, Jung Ki;Kim, Dong Su;Noh, Hoe Jung;Yoon, Jeong Ki;Kim, Tae Seung;
- Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;Soil and Groundwater Division, National Institute of Environmental Research;
- 국내 변성암 지역 음용지하수 중 자연방사성물질(238U, 222Rn)의 환경 특성 연구
- 주병규;김문수;정도환;홍정기;김동수;노회정;윤정기;김태승;
- 국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;
Abstract
This study has investigated naturally occurring radioactive materials (N.O.R.M; $^{238}U$ , $^{222}Rn$ ) for 353 drinking groundwater wells in metamorphic rock areas in Korea. Uranium concentrations ranged from N.D (not detected) to 563.56 ${\mu}g/L$ (median value, 0.68 ${\mu}g/L$ ) and radon concentrations ranged from 108 to 11,612 pCi/L (median value, 1,400 pCi/L). Uranium and radon concentrations in the groundwater generally are similar to USA with similar geological setting. Uranium concentrations in 9 wells (2.6%) exceeded 30 ${\mu}g/L$ , which is the maximum contaminant level (MCL) by the US environmental protection agency (EPA), radon concentrations in 46 wells (13%) exceeded 4,000 pCi/L, which is the Alternative MCL (AMCL) by the US.EPA. The log-log correlation coefficient between uranium and radon was 0.32. The correlation coefficient between uranium and pH was 0.12 and the correlation coefficient between radon and temperature was -0.01. The correlation coefficient between uranium and $HCO_3$ was 0.09 and the correlation coefficient between uranium and Ca was 0.11. The median value of uranium was high Chung-Buk (1.78 ${\mu}g /L$ ), Gyeong-Buk (1.37 ${\mu}g/L$ ), In-Cheon (1.06 ${\mu}g/L$ ) for each province. On the other hand, the median value of radon was high In-Cheon (2,962 pCi/L), Chung-Buk (2,339 pCi/L), Jeon-Buk (2,165 pCi/L) for each province. Jeon-Buk for log-log correlation coefficient is the highest (0.63) among provinces.
Keywords: NORM (Uranium, Radon);Metamorphic rock;Groundwater;Correlation coefficient;MCL and AMCL;
This Article