search for




 

Hydrogeochemistry and Occurrences of Uranium and Radon in Groundwater of Mungyeong Area
문경지역 지하수의 수리지화학 및 우라늄과 라돈의 산출 특성
Econ. Environ. Geol. 2018 Dec;51(6):553-66
Published online December 31, 2018;  https://doi.org/10.9719/EEG.2018.51.6.553
Copyright © 2018 the Korean society of economic and environmental gelology.

Byeongdae Lee1*, Byung Uk Cho1, Moon Su Kim2 and Jae Hong Hwang3
이병대1* ·조병욱1 ·김문수2 ·황재홍3

1Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
2Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, Korea
3Geoplatform Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
1한국지질자원연구원 지질환경연구본부, 2국립환경과학원 토양지하수연구과, 3한국지질자원연구원 지오플랫폼연구본부
Received November 27, 2018; Revised December 14, 2018; Accepted December 15, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
The occurrence of natural radionuclides like uranium and radon in groundwater was hydrochemically examined based on 40 well groundwaters in Mungyeong area. The range of electrical conductivity (EC) value in the study area was 68~574 μS/cm. In addition to the increase of EC value, the content of cations and anions also tends to increase. Uranium concentrations ranged from 0.03~169 μg/L (median value, 0.82 μg/L) and radon concentrations ranged from 70~30,700 pCi/L (median value, 955 pCi/L). Only 1 out of 40 wells (2.5%) showed uranium concentration exceeding the maximum contaminant level (MCL; 30 μg/L) proposed by the US Environmental Protection Agency (EPA). Radon concentrations of eight wells (20%) exceeded AMCL(Alternative maximum contaminant level) of the US EPA (4,000 pCi/L). Four out of those eight wells even exceeded Finland’s guideline level (8,100 pCi/L). When concentrations of uranium and radon were investigated in terms of geology, the highest values are generally associated with granite. The uranium and radon levels observed in this study are low in comparison to those of other countries with similar geological settings. It is likely that the measured value was lower than the actual content due to the inflow of shallow groundwater by the lack of casing and grouting.
Keywords : radionuclide, uranium, radon, groundwater, well

 

December 2018, 51 (6)