Characteristics of Occurrence and Distribution of Natural Radioactive Materials, Uranium and Radon in Groundwater of the Danyang Area
| Autor: | Chang Oh Choo, Uk Yun, Tae Seung Kim, Jae Hong Hwang, Byeong Dae Lee, Byong Wook Cho, Moon Su Kim |
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| Rok vydání: | 2013 |
| Předmět: |
Radionuclide
Environmental Engineering Radiogenic nuclide Lithology chemistry.chemical_element Mineralogy Radon Uranium Geotechnical Engineering and Engineering Geology chemistry Piper diagram Earth and Planetary Sciences (miscellaneous) Maximum Contaminant Level Engineering (miscellaneous) Geology Groundwater |
| Zdroj: | The Journal of Engineering Geology. 23:477-491 |
| ISSN: | 1226-5268 |
| Popis: | Natural radionuclides in groundwater in the Danyang area were investigated to characterize the behaviors of uranium and radon with respect to lithology and physico-chemical components, which can aid our understanding of their occurrence, properties, and origins. To this end, a total of 100 groundwater samples were collected and analyzed, and radionuclide levels were used to construct detailed concentration maps. The water type of the groundwater, assessed using a Piper diagram, is mainly Ca-Na-. The concentrations of uranium range from 0.02 to (average, ) and only 1% exceed USEPA`s MCL (Maximum Contaminant Level). Uranium is enriched in groundwaters of Cretaceous granites and Precambrian metamorphic rocks, whereas it is depleted in groundwaters of sedimentary rocks. The concentrations of radon range from 13 to 28,470 pCi/L (average, 2397 pCi/L). Only 15% of the samples exceed AMCL (Alternative Maximum Contaminant Level) of 4000 pCi/L. The radon concentration is highest in groundwater of Cretaceous granites and lowest in groundwater of sedimentary rocks. In conclusion, the distribution and occurrence of radionuclides are intimately related to the basic geological characteristics of the rocks in which the radiogenic minerals are primarily contained. The behavior of uranium is only weakly related to that of radon (correlation coefficient |
| Databáze: | OpenAIRE |
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