Abu Elgoud Elsayed M, Aly Mohamed I, Hamed Mostafa M, Nayl AbdElAziz A
Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo 13759, Egypt.
Department of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Aljouf, Saudi Arabia.
ACS Omega. 2022 Mar 16;7(12):10447-10457. doi: 10.1021/acsomega.1c07255. eCollection 2022 Mar 29.
Now the wide use of nanooxides is attributed to their remarkable collection of properties. Nanocomposites have an impressive variety of important applications. A thermal decomposition approach provides a more optimistic method for nanocrystal synthesis due to the low cost, high efficiency, and expectations for large-scale production. Therefore, in this study a new eco-friendly nanooxide composite with sorption characteristics for europium (Eu(III)) and strontium (Sr(II)) was synthesized by a one-step thermal treatment process using earth-abundant tafla clay as a starting material to prepare a modified tafla (M-Taf) nanocomposite. The synthesized nancomposite was characterized by different techniques before and after sorption processes. Different factors that affected the sorption behavior of Eu(III) and Sr(II) in aqueous media by the M-Taf nanocomposite were studied. The results obtained illustrated that the kinetics of sorption of Eu(III) and Sr(II) by the M-Taf nanocomposite are obeyed according to the pseudo-second order and controlled by a Langmuir isotherm model with maximum sorption capacities ( ) of 25.5 and 23.36 mg/g for Eu(III) and Sr(II), respectively. Also, this novel low-cost and eco-friendly sorbent has promising properties and can be used to separate and retain some radionuclides in different applications.
如今，纳米氧化物的广泛应用归因于其卓越的性能组合。纳米复合材料有着各种各样令人瞩目的重要应用。热分解法由于成本低、效率高且有望大规模生产，为纳米晶体合成提供了一种更具前景的方法。因此，在本研究中，以储量丰富的塔夫拉粘土为起始原料，通过一步热处理工艺合成了一种对铕（Eu(III)）和锶（Sr(II)）具有吸附特性的新型环保纳米氧化物复合材料，以制备改性塔夫拉（M-Taf）纳米复合材料。在吸附过程前后，采用不同技术对合成的纳米复合材料进行了表征。研究了影响M-Taf纳米复合材料在水介质中对Eu(III)和Sr(II)吸附行为的不同因素。所得结果表明，M-Taf纳米复合材料对Eu(III)和Sr(II)的吸附动力学符合准二级动力学，且受朗缪尔等温线模型控制，Eu(III)和Sr(II)的最大吸附容量（ ）分别为25.5和23.36 mg/g。此外，这种新型低成本且环保的吸附剂具有良好的性能，可用于不同应用中分离和保留一些放射性核素。
