Abstract:
The samples of precipitated tin (IV) phosphate, modified using hydrothermal, microwave, and mechanochemical procedures, were studied in the process of Cs(I), Sr(II), and U(VI) ion sorption. The initial and modified samples were investigated before and after sorption using XRD, XRF, FTIR, and nitrogen adsorption-desorption. It was found that the modification procedures transformed the micro-mesoporous structure of the initial sample into a meso-macroporous structure. As a result, the sorption capacity in relation to all ions increases several times. This indicates the determining role of the porous structure, primary content, and mesopore size on the sorption activity of tin phosphate. The samples, treated in the form of a wet gel, which is a novel procedure, showed the maximum sorption indicators. The sorption of all the tested ions is described by the Langmuir isotherm.
摘要:
沉淀的磷酸锡(IV)的样品,使用水热改性,微波炉,和机械化学程序,在Cs(I)的过程中进行了研究,高级(二)、和U(VI)离子吸附。使用XRD对初始和改性样品在吸附前后进行了研究,XRF,FTIR,和氮气吸附-解吸。发现改性程序将初始样品的微孔结构转化为中孔-大孔结构。因此,相对于所有离子的吸附能力增加了数倍。这表明了多孔结构的决定性作用,主要内容,中孔尺寸对磷酸锡吸附活性的影响。样品,以湿凝胶的形式处理,这是一个新颖的程序,显示了最大吸附指标。所有测试离子的吸附由Langmuir等温线描述。