琼脂糖
傅里叶变换红外光谱
水溶液
吸附
吸附
化学
热重分析
色谱法
化学工程
核化学
材料科学
分析化学(期刊)
有机化学
工程类
作者
Jiaxing Li,Zhiqiang Guo,Shouwei Zhang,Xiangke Wang
标识
DOI:10.1016/j.cej.2011.06.079
摘要
A kind of magnetic Fe3O4@Agarose microsphere (MAM) with a core-shell structure, large volume shrinkage and high stability in acidic solution was synthesized to remove radionuclides from aqueous solutions. The structure, magnetic and surface properties of MAM were characterized by microscope, Fourier transform infrared (FTIR) spectroscopy, vibrating sample magnetometry (VSM) and thermo gravimetric analysis (TGA). The agarose-functionalized MAM exhibits high sorption capacities of 1.151 mmol/g for U(VI) and 1.276 mmol/g for Eu(III) through the formation of strong complexes of radionuclides with abundant hydroxyl groups in the molecular chain of agarose. The radionuclide-loaded MAM could be recovered from aqueous solution by magnetic separation. Moreover, the volume of the MAM sample could shrink down to about a twentieth of the wet sample when dried, which is easy to be sealed and deposited. The findings of this present work highlight the potential using of MAM as an effective and safe adsorbent for the removal and preconcentration of radionuclides from wastewater.
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