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Krypton-85 dating of shallow aquifer in Hebei Plain

Xiang-yang ZHANG1,2, Zong-yu CHEN2, Guo-min YANG1, Le-yi TU1, Shui-ming HU1( )
University of Science and Technology of China, Hefei National Laboratory for Physical Sciences, Hefei 230026, China
Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang 050061, China
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Abstract

The inert gas radioactive isotope 85Kr (with a half-life of 10.74 years), due to its stable physical and chemical properties, is an ideal tracer for shallow groundwater dating. In such a dating application, first the dissolved gas is extracted from groundwater in the field, then krypton is separated from the gas sample, and finally the isotopic abundance 85Kr/Kr will be determined by an ATTA instrument. According to the atmospheric input curve of 85Kr, the 85Kr age of groundwater is determined. We conducted 85Kr analysis in three wells in Zhengding County on the plains in front of the Taihang Mountains, and made a comparison with tritium (3H) method.

Keywords

Tracer analysisKrypton-85TritiumGroundwaterIsotope dating

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Journal of Groundwater Science and Engineering
Volume 4 Issue 4,
December 2016
Pages 328-332
DOI: 10.26599/JGSE.2016.9280037

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Cite this article:
ZHANG X-y, CHEN Z-y, YANG G-m, et al. Krypton-85 dating of shallow aquifer in Hebei Plain. Journal of Groundwater Science and Engineering, 2016, 4(4): 328-332. https://doi.org/10.26599/JGSE.2016.9280037

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Published: 28 December 2016
© 2016 Journal of Groundwater Science and Engineering Editorial Office