南华大学学报（自然科学版）2025，Vol.39Issue(1)：1-6,6.DOI:10.19431/j.cnki.1673-0062.2025.01.001
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
摘要
Abstract
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 urani-um leaching agent in the regulation of pH,Eh,and HCO3-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 in-creased slightly,and the HCO3-concentration decreased slightly;as O2 injection increases,the Eh of groundwater increased substantially,the pH increased slightly,and the HCO3-concentration remained stable;as NH4HCO3 addition increases,the pH of groundwater increased slightly,and the Eh decreased slightly,HCO3-concentration in-creased significantly;CO2,O2,and NH4HCO3 acted separately,and the results of regula-tion of groundwater pH,Eh,and HCO3-concentration did not meet the practical require-ments 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 regula-ted to 251 mV,and HCO3-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.关键词
CO2+O2地浸采铀/砂岩铀矿/CO2+O2中性浸出Key words
uranium extraction by ground leaching with CO2 and O2/sandstone-type urani-um deposit/CO2+O2 neutral leaching分类
核科学引用本文复制引用
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）,2025,39(1):1-6,6.基金项目
国家自然科学基金面上项目(42277264) （42277264）
