利用CO_2地质存储富集盐湖卤水中铀的可行性探讨  

Feasibility Study of Uranium Concentration from Brine in Salt Lake by Carbon Dioxide Geological Storage Technology

作　　者：韩积斌[1] 许建新[1] 马海洲[1] 

机构地区：[1]中国科学院青海盐湖研究所盐湖地质与环境重点实验室,青海西宁810008

出　　处：《安全与环境工程》2014年第1期9-11,34,共4页Safety and Environmental Engineering

基　　金：中国科学院"西部之光"人才培养计划项目;中国科学院知识创新工程重要方向项目(KJCX2-YW-N50)

摘　　要：基于CO2地质存储的理论和方法,将CO2注入到盐湖晶间卤水层中,并把晶间卤水中的铀富集到湖表卤水,从而有利于更进一步地对其进行分离提取。本文研究了注入CO2对盐湖环境的脱碳酸作用、矿物溶解、pH值以及水循环方式的影响,并对利用CO2地质存储富集盐湖卤水中铀的可行性进行了探讨。结果表明:在盐湖晶间卤水中注入CO2来富集铀的方法具有一定的可行性,一定程度上可以缓解我国铀资源匮乏的困境,具有广阔的发展前景;但过量注入CO2可能对盐湖环境产生负面影响,因此应从定量的角度评价CO2的注入量及其对孔隙度、渗透率等的影响问题。This paper builds a hypothesis to inject CO2 into intercrystalline brine to concentrate the uranium from the intercrystalline brine to the surface brine, which is of great benefit to the further separation. Then the paper studies the impacts of CO2 injection on the decarbonation, mineral solution, pH value and water circulation of salt lake environment and discusses the feasibility of uranium concentration from brine in salt lake by carbon dioxide geological storage technology. The results show that injecting CO2 into intercrystal- line brine to concentrate the uranium is feasible and may help to resolve the lack of uranium in China to some extent. However,the excessive injection of CO2 will exert negative impacts on salt lake,and more re- searches about the quantitative evaluation of the injection rate of CO2 and the impacts of the rate on porosi- ty, permeability and so on should be carried out in future.

关 键 词：CO2地质存储 盐湖卤水 铀 富集 

分 类 号：X142[环境科学与工程—环境科学] P342[天文地球—水文科学]