The manuscript presents the results on the sorption of U(VI), Am(III) & Eu(III) from pH medium by a novel amido-amine functionalized multiwalled carbon nanotube (MWCNT). The novel functional group was introduced in the MWCNT by two step processes and characterized by various instrumental techniques like Scanning Electron Microscopy (SEM), Raman and X-ray Photoelectron Spectroscopy (XPS). The sorption process was found to be highly dependent on the pH of the solution with maximum sorption for both 233U, 241Am & 152+154Eu at pH 7.0. Kinetics of sorption was found to be fast with equilibrium reached in ∼15 minutes and the sorption was found to be following pseudo 2nd order kinetics for the radionuclides. The sorption for both 233U and 152+154Eu followed Langmuir sorption model with maximum sorption capacity of 20.66 mg/g and 16.1 mg/g respectively. This has been explained by DFT calculations which shows that more negative solvation energy of U(VI) compared to Am(III) and Eu(III) and stronger U-MWCNT-AA complex is responsible for higher sorption capacity of U(VI) compared to Am(III) and Eu(III).The synthesized amido-amine functionalized MWCNT is a very promising candidate for removal of actinides and lanthanides from waste water solution with high efficiency

中文翻译：

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碳纳米管用新型官能团-氨基胺进行功能化，以吸收act系元素

该手稿介绍了新型酰胺基胺官能化多壁碳纳米管（MWCNT）从pH介质吸附U（VI），Am（III）和Eu（III）的结果。通过两个步骤将新的官能团引入到MWCNT中，并通过各种仪器技术，如扫描电子显微镜（SEM），拉曼光谱和X射线光电子能谱（XPS）对其进行了表征。发现吸附过程高度依赖于溶液的pH，在pH 7.0下对233U，241Am和152 + 154Eu都具有最大吸附。发现吸附动力学很快，在约15分钟内达到平衡，并且吸附遵循放射性核素的伪二级动力学。233U和152 + 154Eu的吸附均遵循Langmuir吸附模型，最大吸附容量为20.66 mg / g和16。分别为1 mg / g。DFT计算已解释了这一点，该计算表明，与Am（III）和Eu（III）相比，U（VI）的负溶剂化能更多，而U-MWCNT-AA配合物更强，是U（VI）的更高吸附能力的原因。合成的氨基胺官能化多壁碳纳米管是高效去除废水中act系元素和镧系元素的极有希望的候选者