Ege University, Institute of Nuclear Sciences, 35100 Bornova-Izmir, Turkey.
J Hazard Mater. 2009 Dec 30;172(2-3):667-74. doi: 10.1016/j.jhazmat.2009.07.049. Epub 2009 Jul 22.
In this study, the effect of pH, contact time, temperature, and initial metal concentration on U(VI) adsorption on thermally activated bentonite (TAB) was investigated. Graphical correlation of various adsorption isotherm models like, Freundlich, and Dubinin-Radushkevich have been carried out for TAB. Various thermodynamic parameters, such as, Gibb's free energy, entropy and enthalpy of the on-going adsorption process have been calculated. In order to reveal the adsorptive characteristic of bentonite samples, surface area, FT-IR, and DTA-TG spectra analyses were carried out. The results show that TAB samples can be an alternative low cost adsorbent for removing U(VI) ions from aqueous solutions.
本研究考察了 pH 值、接触时间、温度和初始金属浓度对热活化膨润土 (TAB) 上 U(VI)吸附的影响。对各种吸附等温线模型（如 Freundlich 和 Dubinin-Radushkevich）进行了图形相关分析。计算了正在进行的吸附过程的各种热力学参数，如吉布斯自由能、熵和焓。为了揭示膨润土样品的吸附特性，进行了表面积、FT-IR 和 DTA-TG 光谱分析。结果表明，TAB 样品可以作为一种替代的低成本吸附剂，用于从水溶液中去除 U(VI)离子。
