Citation: XU Zhen, LU Chun-Hai, CHEN Min, CHEN Wen-Kai, HUANG Shuo, ZHANG Qi. Simulation of Uranium Formed in Groundwater of a Low-Level Radioactive Waste Repository Site in Southwest China[J]. Acta Physico-Chimica Sinica, ;2015, 31(S1): 45-48. doi: 10.3866/PKU.WHXB2014Ac05 shu

Simulation of Uranium Formed in Groundwater of a Low-Level Radioactive Waste Repository Site in Southwest China

XU Zhen ¹ ,
LU Chun-Hai ^1,2,, ,
CHEN Min ³ ,
CHEN Wen-Kai ⁴ ,
HUANG Shuo ¹ ,
ZHANG Qi ¹

1.
1 Sichuan Key Laboratory of Applied Nuclear Techniques in Geosciences, Chengdu University of Technology, Chengdu 610059, P. R. China;
2.
2 Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, P. R. China;
3.
3 School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan Province, P. R. China;
4.
4 Department of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China

Corresponding author: LU Chun-Hai,
Fund Project: 国家自然科学基金(41273031) (41273031) 四川省教育厅重点科研项目(13ZA0067) (13ZA0067) 贵州省教育厅科技项目(2011010) (2011010) 成都理工大学科研启动项目(KR1115) (KR1115) 核废物与环境安全国防重点学科实验室开放基金(10zxnk01) (10zxnk01)放射性地质与勘探技术国防重点学科实验室开放基金(2011RGET022)资助 (2011RGET022)

PHREEQC software was used to study the chemical form of uranium based on the chemical composition of groundwater from a low-level radioactive waste repository located in southwest China. The effects of pH, temperature, and pE (the equilibrium state of electronic activity) on the distribution in uranium chemical form were studied. The results show that uranium presents in the VI chemical valence and [UO₂(CO₃)₂]^2-, [UO₂(CO₃)₃]^4-, and UO₂CO₃ forms when pH=7.6, T=12.2 ℃, and pE=4 in groundwater. Temperature and pH strongly impact the distribution of the uranium chemical form. However, pE has little effect on the chemical form distribution. Therefore, pH and groundwater temperature should be taken key considerations during the selection of waste landfill sites.
- Uranium,
- Chemical form,
- PHREEQC,
- Groundwater,
- Simulation
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