Lu Xingjie, Liu Zhen, Wang Wentao, Wang Xin, Ma Hongchao, Cao Meiwen
State Key Laboratory of Heavy Oil Processing, Department of Biological and Energy Chemical Engineering, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China.
Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China.
Nanomaterials (Basel). 2023 Dec 23;14(1):52. doi: 10.3390/nano14010052.
In this study, a novel organic-inorganic hybrid material IIGK@MnO (2-naphthalenemethyl-isoleucine-isoleucine-glycine-lysine@manganese dioxide) was designed as a novel adsorbent for the removal of strontium ions (Sr). The morphology and structure of IIGK@MnO were characterized using TEM, AFM, XRD, and XPS. The results indicate that the large specific surface area and abundant negative surface charges of IIGK@MnO make its surface rich in active adsorption sites for Sr adsorption. As expected, IIGK@MnO exhibited excellent adsorbing performance for Sr. According to the adsorption results, the interaction between Sr and IIGK@MnO can be fitted with the Langmuir isotherm and pseudo-second-order equation. Moreover, leaching and desorption experiments were conducted to assess the recycling capacity, demonstrating significant reusability of IIGK@MnO.
在本研究中，设计了一种新型有机-无机杂化材料IIGK@MnO（2-萘甲基-异亮氨酸-异亮氨酸-甘氨酸-赖氨酸@二氧化锰）作为去除锶离子（Sr）的新型吸附剂。采用透射电子显微镜（TEM）、原子力显微镜（AFM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对IIGK@MnO的形貌和结构进行了表征。结果表明，IIGK@MnO的大比表面积和丰富的表面负电荷使其表面富含用于吸附Sr的活性吸附位点。正如预期的那样，IIGK@MnO对Sr表现出优异的吸附性能。根据吸附结果，Sr与IIGK@MnO之间的相互作用可以用朗缪尔等温线和准二级方程拟合。此外，进行了浸出和脱附实验以评估回收能力，证明IIGK@MnO具有显著的可重复使用性。
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