Thermodynamic modeling of the behavior of Uranium and Arsenic in mineralized Shaazgai-Nuur Lake (Northwest Mongolia)
Thermodynamic modeling of the behavior of Uranium and Arsenic in mineralized Shaazgai-Nuur Lake (Northwest Mongolia)
复制标题
矿化沙兹盖努尔湖（蒙古西北部）中铀和砷行为的热力学模型
DOI：
10.1134/s1028334x15110094
复制
发表时间：
2015
影响因子：
0.9
通讯作者：
M. Kolpakova
中科院分区：
文献类型：
--
作者：
O. Gaskova;V. Isupov;A. Vladimirov;S. Shvartsev;M. Kolpakova
蒙古矿区境内高度矿化的封闭湖泊对于寻找非常规金属来源特别感兴趣。沙兹盖努尔湖纯碱水中的铀含量约为1毫克/升，不良混合物砷的含量高达300微克/升。使用热力学模型估算了溶液和湖底沉积物中的铀和砷形态，并提出了它们的分离方法。对针铁矿和方解石吸附这些元素的模型的计算表明，在天然水的典型 pH 值 9.4 下，它仅在高浓度的 FeOOH 吸附剂下才有效。在这种情况下，在 pH <5 和 >8（U 吸附区域）时，可以通过在额外凝结时从悬浮液中简单过滤溶液来去除 As。
Highly mineralized closed lakes on the territory of ore regions of Mongolia are of special interest in relation to the search for nonconventional sources of metals. Water of soda Shaazgai-Nuur Lake contains ~1 mg/L U, and the content of the undesirable admixture of As is up to 300 μg/L. Uranium and Arsenic speciation in solution and in the bottom sediments of the lake was estimated using thermodynamic modeling, and a method of their separation was suggested. Calculation of the models of sorption of these elements by goethite and calcite showed that at pH 9.4 typical of natural water it could be effective only at a high concentration of FeOOH sorbent. In this case, at pH <5 and >8 (the area of U sorption), As may be removed by simple filtering of solutions from the suspension upon additional coagulation.