| 石宇,丁德馨,张辉,王学兵.内蒙古纳岭沟砂岩铀矿床CO2+O2地浸采铀浸出剂对地下水化学参数的调控作用研究[J].南华大学学报(自然科学版),2025,(1):1~6.[SHI Yu,DING Dexin,ZHANG Hui,WANG Xuebing.Study on the Role of CO2+O2 In-situ Uranium Leaching Agent in the Regulation of Groundwater Chemical Parameters in the Sandstone Uranium Deposit of Nalinggou, Inner Mongolia[J].Journal of University of South China(Science and Technology),2025,(1):1~6.] |
| 内蒙古纳岭沟砂岩铀矿床CO2+O2地浸采铀浸出剂对地下水化学参数的调控作用研究 |
| Study on the Role of CO2+O2 In-situ Uranium Leaching Agent in the Regulation of Groundwater Chemical Parameters in the Sandstone Uranium Deposit of Nalinggou, Inner Mongolia |
| 投稿时间：2024-05-27 |
| DOI： |
| 中文关键词: CO2+O2地浸采铀 砂岩铀矿 CO2+O2中性浸出 |
| 英文关键词:uranium extraction by ground leaching with CO2 and O2 sandstone-type uranium deposit CO2+O2 neutral leaching |
| 基金项目:国家自然科学基金面上项目(42277264) |
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| 中文摘要: |
| 采用内蒙古纳岭沟砂岩铀矿床的地下水样,根据其具体成分制备模拟地下水,研究了CO2+O2地浸采铀浸出剂对砂岩铀矿床地下水pH、Eh和HCO－3质量浓度的调控作用。研究结果表明:1)随着CO2注入量增加,地下水的pH迅速降低、Eh小幅度升高、HCO－3质量浓度小幅度降低;随着O2注入量增加,地下水的Eh大幅度升高、pH小幅度升高、HCO－3质量浓度保持稳定;随着NH4HCO3加入量增加,地下水的pH小幅度升高、Eh小幅度降低、HCO－3质量浓度显著升高;CO2、O2、NH4HCO3各自单独作用,对地下水pH、Eh、HCO－3质量浓度的调控结果不符合浸铀的实际要求。2)当CO2的分压为0.08 MPa、O2的分压为0.7 MPa、NH4HCO3的质量浓度为1 040 mg/L时,地下水的pH被调控至6.25,Eh被调控至251 mV,HCO－3的质量浓度被调控至1 027 mg/L左右,符合浸铀的实际要求。 |
| 英文摘要: |
| The authors collected groundwater samples from the sandstone uranium deposit of Nalinggou, Inner Mongolia,simulated groundwater in the laboratory according to the specific composition of this groundwater, and investigated the role of CO2+O2 in-situ uranium leaching agent in the regulation of pH, Eh, and HCO－3 concentration of the groundwater in the sandstone uranium deposit. The results of the experimentation showed that:1) as CO2 injection increases, the pH of groundwater decreased rapidly, the Eh increased slightly, and the HCO－3 concentration decreased slightly; as O2 injection increases, the Eh of groundwater increased substantially, the pH increased slightly, and the HCO－3 concentration remained stable; as NH4HCO3 addition increases, the pH of groundwater increased slightly, and the Eh decreased slightly, HCO－3 concentration increased significantly; CO2, O2, and NH4HCO3 acted separately, and the results of regulation of groundwater pH, Eh, and HCO－3 concentration did not meet the practical requirements for uranium leaching 2) Under the condition of the partial pressure of CO2 being 0.08 MPa, the partial pressure of O2 was 0.7 MPa, and when the concentration of NH4HCO3 was 1 040 mg/L, the pH of groundwater was regulated to 6.25, Eh was regulated to 251 mV, and HCO－3 concentration was regulated to about 1027 mg/L, which met the practical requirements for uranium leaching. These above results provide experimental support for CO2 and O2 ground leaching mining in Nalingou sandstone uranium deposit. |
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