Separation studies of 60Co (II) and 134Cs (I) radionuclides from aqueous solution using starch-grafted citric acid-acrylamide/magnesia hydrogel

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochimica Acta Pub Date : 2024-06-24 DOI:10.1515/ract-2024-0295

Maha Ali Youssef, Gehan Abdel Rahman Sadek Dakroury, Hisham Soliman Hassan

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Abstract

In this study, three starch hydrogels composite prepared using different ratios of starch, citric acid, acrylamide, and MgO nanoparticles (referred to as St1-g-(CA-AM), St2-g-(CA-AM), and St3-g-(CA-AM) MgO). These materials were assessed using FT-IR, SEM, and EDX. The adsorption of 134Cs(I) and 60Co (II) onto these materials studied using radiometric analysis. The investigation focused on how temperature, contact duration, initial metal ion concentration, and pH of the solution affected the sorption efficiency. It is found that a pH value of 7 optimized the adsorption reaction, reaching equilibrium after 40 minutes. The kinetics of the adsorption followed a pseudo-second order model. The Langmuir model adequately explained the sorption mechanism, supported by the analysis of isotherm models. The monolayer adsorption capacities for 60Co (II) and 134Cs (I) were 113.38 and 100.2 mg g−1, respectively. The thermodynamic study indicated that the sorption process is both endothermic and spontaneous.

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利用淀粉接枝柠檬酸-丙烯酰胺/镁水凝胶从水溶液中分离 60Co (II) 和 134Cs (I) 放射性核素的研究

本研究采用不同比例的淀粉、柠檬酸、丙烯酰胺和氧化镁纳米颗粒（简称为 St1-g-(CA-AM)、St2-g-(CA-AM)和 St3-g-(CA-AM) MgO）制备了三种淀粉水凝胶复合材料。使用傅立叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和电离辐射显微镜（EDX）对这些材料进行了评估。使用辐射分析法研究了 134Cs（I）和 60Co（II）在这些材料上的吸附情况。研究重点是温度、接触时间、初始金属离子浓度和溶液的 pH 值如何影响吸附效率。研究发现，pH 值为 7 时吸附反应最佳，40 分钟后达到平衡。吸附动力学遵循伪二阶模型。朗缪尔模型充分解释了吸附机理，等温线模型的分析也为其提供了支持。60Co (II) 和 134Cs (I) 的单层吸附容量分别为 113.38 和 100.2 mg g-1。热力学研究表明，吸附过程是内热和自发的。

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来源期刊

Radiochimica Acta 化学-核科学技术

CiteScore

2.90

自引率

16.70%

发文量

审稿时长

6 months

期刊介绍： Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.