使用添加了活性炭的三醋酸纤维素膜从水中去除铀。
Uranium removal from water using cellulose triacetate membranes added with activated carbon.
作者信息
Villalobos-Rodríguez R, Montero-Cabrera M E, Esparza-Ponce H E, Herrera-Peraza E F, Ballinas-Casarrubias M L
机构信息
Centro de Investigación en Materiales Avanzados, Chihuahua, Chih., Mexico.
出版信息
Appl Radiat Isot. 2012 May;70(5):872-81. doi: 10.1016/j.apradiso.2012.01.017. Epub 2012 Feb 8.
Ultrafiltration removal of uranium from water, with composite activated carbon cellulose triacetate membranes (AC-CTA), was investigated. The filtrate was provided by uraninite dissolution with pH=6-8. Removal efficiencies were calculated measuring solutions' radioactivities. Membranes were mainly characterized by microscopy analysis, revealing iron after permeation. Uranyl removal was 35±7%. Chemical speciation indicates the presence of (UO(2))(2)CO(3)(OH)(3)(-), UO(2)CO(3), UO(2)(CO(3))(2)(2-) and Fe(2)O(3)(s) as main compounds in the dissolution, suggesting co-adsorption of uranium and iron by the AC during filtration, as the leading rejection path.
研究了用复合活性炭三醋酸纤维素膜（AC-CTA）从水中超滤去除铀的情况。滤液由pH值为6-8的晶质铀矿溶解提供。通过测量溶液的放射性来计算去除效率。主要通过显微镜分析对膜进行表征，结果显示渗透后有铁存在。铀酰的去除率为35±7%。化学形态分析表明，溶解物中的主要化合物有（UO(2)）(2)CO(3)(OH)(3)(-)、UO(2)CO(3)、UO(2)(CO(3))(2)(2-)和Fe(2)O(3)(s)，这表明在过滤过程中，AC对铀和铁的共吸附是主要的截留途径。
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