Esrafili Ali, Ghambarian Mahnaz, Yousefi Mahmood, Yazdanfar Najmeh
Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran.
Sci Rep. 2024 Dec 28;14(1):30974. doi: 10.1038/s41598-024-82037-y.
This manuscript describes the successful synthesis of FeO nanoparticles coated with β-cyclodextrin-intercalated layered double hydroxide, which were utilized to remove Uranium (VI) from an aqueous solution effectively. The newly developed nano-adsorbent underwent thorough analysis through advanced techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), and energy-dispersive X-ray analysis (EDX). Through the utilization of a one-variable-at-a-time strategy, we effectively enhanced the removal process by optimizing key factors such as the sample's pH and the amount of adsorbent utilized. These adjustments proved crucial in achieving utmost success. The adsorption mechanism was identified by plotting Langmuir and Freundlich isotherms. Under the optimized conditions, the removal efficiency of as high as 96.21%, as well as the adsorption capacity of 461.89 mg g, were obtained showing the desirable performance of the synthesized nano-adsorbent in Uranium (VI) removal from aqueous solutions. The selectivity of the adsorbent was evaluated by calculating distribution coefficients for Uranium (VI) and some interfering ions. The applicability of the adsorbent was tested by removing uranium (VI) from diverse complex environmental water samples. As a result of the removal efficiencies exceeding 92.76% with relative standard deviations (RSDs%) below 6.73%, the synthesized adsorbent can successfully remove Uranium (VI) from complex real samples with acceptable precisions.
本手稿描述了成功合成涂覆有β-环糊精插层层状双氢氧化物的FeO纳米颗粒，该纳米颗粒被用于有效去除水溶液中的铀（VI）。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、振动样品磁强计（VSM）和能量色散X射线分析（EDX）等先进技术对新开发的纳米吸附剂进行了全面分析。通过采用一次改变一个变量的策略，我们通过优化样品pH值和吸附剂用量等关键因素有效地增强了去除过程。这些调整被证明对取得最大成功至关重要。通过绘制朗缪尔等温线和弗伦德利希等温线确定了吸附机理。在优化条件下，获得了高达96.21%的去除效率以及461.89 mg/g的吸附容量，表明合成的纳米吸附剂在从水溶液中去除铀（VI）方面具有理想的性能。通过计算铀（VI）和一些干扰离子的分配系数来评估吸附剂的选择性。通过从不同复杂环境水样中去除铀（VI）来测试吸附剂的适用性。由于去除效率超过92.76%，相对标准偏差（RSDs%）低于6.73%，合成的吸附剂能够以可接受的精度成功地从复杂实际样品中去除铀（VI）。
