作者机构：
[Wangzhengqing; Liushan; Huyang; Xieyanshi; Duanxianzhe; Fengzhigang; Chenliang] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.;[Huyang] Univ South China, Postdoctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.;[Huyang] Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.;[Jiazhikun] Sinochem Petr Explorat & Prod Co Ltd, Beijing 100031, Peoples R China.
会议名称：
4th International Conference on Energy and Environmental Protection (ICEEP)
会议时间：
JUN 02-04, 2015
会议地点：
Shenzhen, PEOPLES R CHINA
会议主办单位：
[Huyang;Fengzhigang;Xieyanshi;Chenliang;Duanxianzhe;Wangzhengqing;Liushan] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.^[Huyang] Univ South China, Postdoctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.^[Huyang] Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.^[Jiazhikun] Sinochem Petr Explorat & Prod Co Ltd, Beijing 100031, Peoples R China.
关键词：
sandstone-type uranium deposit;chemical speciation of uranium;sequential chemical extraction;in-situ Leaching
摘要：
This paper presents a method of studying uranium speciation with six different hole depth and numbers from in-situ leaching sandstone-type uranium deposits by a sequential extraction procedure and demonstrates its application to sandstone uranium exploration. The chemical extraction procedure was modified from Tessier. The chemical speciation of uranium in samples was classified into six speciation: exchangeable ions, bound to carbonates, bound to sulfide-organic matter, bound to amorphous Fe-Mn oxides/bound to hydroxide, bound to sparry Fe-Mn oxides/bound to hydroxide and residual speciation. Studying the chemical speciation of uranium by method of sequential extraction show that the uranium distribution characteristics were significantly different whether they were in different samples or in the same sample. Therefore, a research on chemical speciation of Deposit behind the production is essential to reasonable evaluation of Deposit and guide the technology of in-situ leaching uranium Deposit. It also can rich the mineralization mechanism of sandstone-type uranium Deposit. The average amounts of bound to carbonates, exchangeable ions, bound to amorphous Fe-Mn oxides, residual speciation, bound to sulfide-organic matter and bound to sparry Fe-Mn oxides in order as 58.9%, 22.6%, 13.3%, 2.3%, 1.4% and 1.4%.
