某尾矿库尾矿渗水中铀的化学形态研究

Research on Chemical Species of Uranium in Seepage of Uranium Tailings

运用环境水化学平衡软件Visual MINTEQ 3.1研究了某尾矿库尾矿渗水中铀的化学形态,并模拟在不同pH、F-浓度、U浓度等条件下铀化学形态的变化规律。结果表明:尾矿渗水中,铀主要以UO_2F^+和UO_2F_2(aq)形态存在;pH对铀的存在形态影响较大,F-和铀在较低浓度范围内对铀的化学形态影响不明显,但对其浓度影响较大。

The uranium＇s chemical species in seepage of uranium tailings was studied by the Visual MINTEQ 3.1 soft.The effects of some factors such as pH,concentration of F-and uranium on chemical species of uranium were examined.The results show that UO2F~＋ and UO2F2（aq）are mainly species of uranium in the seepage.Uranium forms in the seepage are mainly affected by solution pH.The change of concentration of F-and uranium has less influence on the chemical species of uranium,but has a significant influence on the content of uranium species.