Cite this paper:
KONG Fancui, SHA Zhanjiang, DU Jinzhou, SU Weigang, YU Chenguang, ZHAO Shunli, HU Jufang, YE Mei. Analysis of the distribution characteristics of 226Ra and 228Ra and their sources in the western part of Qinghai Lake[J]. Journal of Oceanology and Limnology, 2015, 33(6): 1402-1412

Analysis of the distribution characteristics of 226Ra and 228Ra and their sources in the western part of Qinghai Lake
KONG Fancui1,2,3, SHA Zhanjiang1,4, DU Jinzhou5, SU Weigang1,2, YU Chenguang1,2, ZHAO Shunli1,2, HU Jufang1,2, YE Mei4
1 Qinghai Institute of Salt Lakes, Chinese Academy of Science s, Xining 810008, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Zoucheng Bureau of Land and Resources, Zoucheng 273500, China;
4 Life and Geographical Sciences College and Education Ministry Key Laboratory of Environments and Resources in the Tibetan Plateau, Qinghai Normal University, Xining 810008, China;
5 State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
Abstract:
The 226Ra and 228Ra activities of Qinghai Lake surface water, groundwater, river water, suspended particles, and bottom sediments were measured in a gamma-ray spectrometer. The sources of 226Ra and 228Ra were discussed according to their distribution characteristics. 226Ra and 228Ra activities (dpm/(100 L)) ranged from 14.13±0.22 to 19.22±0.42 and 17.72±0.66 to 30.96±1.47 in the surface water of the North Bay, respectively, and from 7.88±0.24 to 33.80±0.47 and 15.73±0.74 to 57.31±1.44, respectively, in the South Bay. The surface water near the estuary had a lower salinity and had a higher concentration of radium isotopes than the samples collected further away. The farther offshore the sample, the higher the salinity was, and the lower the radium isotope activity. The distribution of radium activities in the western part of Qinghai Lake is controlled by several factors, including Buha River runoff, desorption from suspended particles derived from the river, groundwater discharge, and a small amount of diffusion from the sediment.
Key words:    226Ra|228Ra|surface water of Qinghai lake|groundwater|river water|Qinghai Lake   
Received: 2014-12-11   Revised: 2015-02-21
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Articles by KONG Fancui
Articles by SHA Zhanjiang
Articles by DU Jinzhou
Articles by SU Weigang
Articles by YU Chenguang
Articles by ZHAO Shunli
Articles by HU Jufang
Articles by YE Mei
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