期刊论文

中文

岩矿测试

0254-5357

2012

31

3

501-506

10.15898/j.cnki.11-2131/td.2012.03.019

国家自然科学基金项目（40973070）；

本校为第一机构

以新疆某地浸砂岩型铀矿为研究对象,参考Tessier逐级化学提取方法,对10件矿芯试样进行铀赋存形态的研究。将铀赋存形态分为可交换离子态、碳酸盐结合态、铁锰氧化物结合态、硫化物及有机物结合态和残渣态,其中前4种形态铀为活性铀,残渣态铀为惰性铀。研究结果显示,无论是试样间还是同一试样内,铀的形态分布特征都存在明显的差异。各形态铀的含量(平均值)占总量铀的比例为:残渣态(37.75%,RSD为1.80%)>碳酸盐结合态(20.56%,RSD为2.72%)>可交换离子态(15.51%,RSD为1.85%)>硫化物及有机物结合态(14.26%,RSD为2.08%)>铁锰氧化物结合态(11.91%,RSD为1.75%),表明残渣态铀是砂岩型铀矿石中铀的重要赋存形...

This paper presents a method of studying uranium speciation 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. Uranium in samples was classified into five speciations： exchangeable ions, bound to carbonates, bound to Fe-Mn oxides, bound to sulfide-organic matter and residual speciation. The first four phases consisted of active uranium with the residual uranium being stable uran...