Jabbar Ali A, Hussain Dhia H, Latif Kamal H, Albukhaty Salim, Jasim Adel Kareem, Sulaiman Ghassan M, Abomughaid Mosleh M
College of Science/Chemistry Department, Mustansiriyah University, Baghdad, Iraq.
The Iraqi Authority for the Control of Radioactive Sources, Baghdad, Iraq.
Sci Rep. 2024 Jan 13;14(1):1285. doi: 10.1038/s41598-024-52043-1.
Waste-water pollution by radioactive elements such as uranium has emerged as a major issue that might seriously harm human health. Graphene oxide, graphene oxide nanoribbons, and sodium alginate nanocomposite aerogels (GO/GONRs/SA) were combined to create a novel nanocomposite using a modified Hummer's process and freeze-drying as an efficient adsorbent. Batch studies were conducted to determine the adsorption of uranium (VI) by aerogel. Aerogels composed of (GO/GONRs/SA) were used as an effective adsorbent for the removal of U (VI) from aqueous solution. Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to describe the structure, morphologies, and characteristics of (GO/GONRs/SA) aerogels. The initial concentration of uranium (VI) and other environmental factors on U (VI) adsorption were investigated, period of contact, pH, and temperature. A pseudo-second-order kinetic model can be employed to characterize the kinetics of U (VI) adsorption onto aerogels. The Langmuir model could be applied to understand the adsorption isotherm, and the maximum adsorption capacity was 929.16 mg/g. The adsorption reaction is endothermic and occurs spontaneously.
铀等放射性元素造成的废水污染已成为一个可能严重危害人类健康的重大问题。通过改良的Hummer法和冷冻干燥法，将氧化石墨烯、氧化石墨烯纳米带和海藻酸钠纳米复合气凝胶（GO/GONRs/SA）结合起来，制备出一种新型纳米复合材料作为高效吸附剂。进行了批次研究以确定气凝胶对铀（VI）的吸附情况。由（GO/GONRs/SA）组成的气凝胶被用作从水溶液中去除U（VI）的有效吸附剂。利用傅里叶变换红外（FT-IR）光谱、X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）来描述（GO/GONRs/SA）气凝胶的结构、形态和特性。研究了铀（VI）的初始浓度以及接触时间、pH值和温度等其他环境因素对U（VI）吸附的影响。可以采用准二级动力学模型来表征U（VI）在气凝胶上的吸附动力学。Langmuir模型可用于理解吸附等温线，最大吸附容量为929.16 mg/g。吸附反应是吸热的且自发进行。
