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| Sorption behavior of U(VI), ~(234)U(VI) and ~(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in China | |
| 作者姓名： | MIN Maozhong LUO Xingzhang WANG Ju JIN Yuanxin & WANG Rucheng . |
| 作者单位： | MIN Maozhong1，2，LUO Xingzhang3，WANG Ju4，JIN Yuanxin4 & WANG Rucheng1 1. Department of Earth Sciences，State Key Laboratory of Mineral Deposit Research，Nanjing University，Nanjing 210093，China; 2. Center of Materials Analysis，Nanjing University，Nanjing 210093，China; 3. Department of Environmental Science and Engineering，Nanjing University，Nanjing 210093，China; 4. Beijing Geology Institute，Nuclear Industry，Beijing 100029，China |
| 基金项目： | 国家自然科学基金，the Ph.D. Base Foundation of Chinese Education Ministry，Chinese High-level Radwaste Deep Geologic Disposal Research Foundation |
| 摘 要： | Knowing the transport of uranium and radionu-clides through the environment is important for as-sessing the risk posed by long-term disposal of rad-waste. Granitic rocks have been selected as a host-rock type for the first high-level radwaste repository in China. According to the Chinese High-level Rad-waste Management Program, high-level radwaste (HLW) will be buried at 800―1000 m depth in a granitic pluton in Northwest China and, specifically, in the A granitic complex of Beishan area,… |
Sorption behavior of U(VI), 234U(VI) and 238U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in China |
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| MIN Maozhong,,LUO Xingzhang,WANG Ju,JIN Yuanxin & WANG Rucheng ..Sorption behavior of U(VI), ~(234)U(VI) and ~(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in China[J].Science in China(Earth Sciences),2005,48(10). | |
| Authors: | MIN Maozhong LUO Xingzhang WANG Ju JIN Yuanxin WANG Rucheng |
| Institution: | 1. Department of Earth Sciences, State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093, China;Center of Materials Analysis, Nanjing University, Nanjing 210093, China 2. Department of Environmental Science and Engineering, Nanjing University, Nanjing 210093, China 3. Beijing Geology Institute, Nuclear Industry, Beijing 100029, China 4. Department of Earth Sciences, State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093, China |
| Abstract: | The first results of sorption experiments of U(VI), 234U(VI) and 238U(VI) onto original (unpurified) fracture-filling clays from No.1 monzonitic granite intrusion, Beishan area, Gansu Province, China are reported. The monzonitic granite intrusion is a potential location for a high-level radwaste (HLW) repository in China. The present experimental results show that the maximum U(VI) sorption reached 92% at near-neutral pH and the distribution coefficient (Kd) was 1226 mL/g. A high sorption capacity of the fracture-filling clays in host rock on radioactive ele-ments is necessary for HLW deep geological disposal repository. No preferential sorption of 234U onto the clays was found. Finally, the sorption of U(VI) onto the clays was also modeled using a surface complexation model. |
| Keywords: | HLW geological disposal repository granite uranium radionuclide clay sorption |
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