Abstract In the present study, ground dry powder of Myriophyllum spicatum L. was utilized for adsorption of cobalt and cesium dissolved in water to imitate an aqueous solution contaminated with stable or radioactive elements. The dried biomass was characterized by FT-IR. The adsorption behavior was evaluated with varying various factors such as time effect, concentration of metal ion, temperature and pH-value to find out kinetic and equilibrium isotherms parameters. The experimental results indicated that about 85% of Co and more than 50% of Cs were efficiently removed from contaminated water by using the dried plant of M. spicatum L. as a function of metal concentration. Moreover, the equilibrium data were carried out by extrapolation of the “Langmuir” and “Freundlich” isotherms. Pseudo-first order, pseudo-second- order and intra-particular diffusion models were applied for the kinetic study. Based on the experimental and theoretical data obtained, it is suggested that dried biomass of M. spicatum L. could be used as an inexpensive and efficient natural adsorbent material of reasonable efficiency for the accumulation of cobalt and cesium metals from aqueous solutions.

中文翻译：

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铯和钴从放射性污染的水中吸附到干燥的狐尾兰上：实验和理论研究

摘要 在本研究中，磨碎的狐尾兰干粉用于吸附溶解在水中的钴和铯，以模拟被稳定或放射性元素污染的水溶液。干燥的生物质通过 FT-IR 表征。吸附行为通过各种因素进行评估，例如时间效应、金属离子浓度、温度和 pH 值，以找出动力学和平衡等温线参数。实验结果表明，通过使用 M. spicatum L. 的干燥植物作为金属浓度的函数，可以有效地从污染水中去除约 85% 的 Co 和超过 50% 的 Cs。此外，平衡数据是通过“Langmuir”和“Freundlich”等温线的外推法得出的。伪一阶，拟二级和特定内部扩散模型应用于动力学研究。根据获得的实验和理论数据，表明 M. spicatum L. 的干燥生物质可作为一种廉价且高效的天然吸附材料，具有合理的效率，可用于从水溶液中积累钴和铯金属。