Abstract

The removal of U(VI) ions from aqueous solutions with Bakul leaves was studied using a batch adsorption technique. The adsorption equilibrium, thermodynamics, and kinetic models were analyzed. The influence of pH, initial uranium concentration, contact time, temperature, and adsorbent dose on the uranium adsorption was estimated. The maximal uranium uptake was 86.4%. The U(VI) adsorption is well fitted using the Langmuir model and the pseudo-second-order model. Analysis of the thermodynamic functions of adsorption (ΔG°, ΔH°, ΔS°) at 303, 313 and 323 K shows that the adsorption on the surface of Bakul leaves is spontaneous and endothermic. Thus, Bakul leaves can be utilized as an economical, active, and eco-friendly adsorbent for uranium removal.

中文翻译：

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Mimusops Elengi叶作为生物吸附剂，用于去除水溶液中的铀酰离子

摘要

使用分批吸附技术研究了用Bakul叶片从水溶液中去除U（VI）离子的过程。分析了吸附平衡，热力学和动力学模型。估算了pH，初始铀浓度，接触时间，温度和吸附剂剂量对铀吸附的影响。最大铀吸收率为86.4％。使用Langmuir模型和伪二级模型可以很好地拟合U（VI）吸附。对303、313和323 K处的吸附热力学函数（ΔG °，ΔH °，ΔS °）的分析表明，Bakul叶片表面的吸附是自发的并且是吸热的。因此，Bakul叶片可用作去除铀的经济，有效和环保的吸附剂。