Distribution of uranium isotopes in the main channel of Yellow river (Huanghe), China |
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| Authors: | Xueyan Jiang Zhigang Yu Teh-Lung Ku Xinglun Kang Wei Wei Hongtao Chen |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, PR China;2. Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA;3. Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, PR China;4. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, PR China |
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| Abstract: | Uranium isotopes were measured in waters and suspended particulate matters (SPM) of the main channel of Yellow River, China that were sampled during four field trips between August 2005 and July 2006. The results show that the concentration of dissolved U (2.04–7.83 μg/l) and the activity ratio of 234U/238U (1.36–1.67) are much higher than the average U concentrations and activity ratios of global major rivers. Mass balance calculations using the results of simulated experiments and measurement data show that the section of the Yellow River between Lanzhou and Sanmenxia has its dissolved U derived from two sources: suspended sediments (68%) and groundwater/runoff from loess deposits (32%). Both sources are related to the heavy erosion of the Chinese Loess Plateau. |
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| Keywords: | Yellow river Dissolved U 234U/238U activity ratio Chinese Loess Plateau |
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