Department of Chemistry, Faculty of Science, University of Birjand, P.O. Box. 97175/615, Birjand, Iran.
J Hazard Mater. 2012 May 15;215-216:208-16. doi: 10.1016/j.jhazmat.2012.02.054. Epub 2012 Mar 3.
In this study, silica-coated magnetic nanoparticles modified with quercetin were synthesized by a sol-gel method. These magnetic nanoparticles were assessed as a new solid phase sorbent for extraction of uranyl ions from aqueous solutions. The crystal and chemical structures and magnetic property of the new sorbent were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectrophotometer (FT-IR), and vibration sample magnetometer (VSM). The experimental parameters affecting the extraction efficiency of uranyl ions from aqueous solutions using the synthesized sorbent were optimized by means of the response surface methodology. The adsorption equilibrium of uranyl ions onto the sorbent was explained by Langmuir isotherm and maximum monolayer adsorption capacity was found 12.33mg/g. The synthesized sorbent was applied to extraction of uranyl ions from different water samples.
在这项研究中，通过溶胶-凝胶法合成了用槲皮素修饰的硅涂层磁性纳米粒子。这些磁性纳米粒子被评估为一种从水溶液中提取铀酰离子的新型固相吸附剂。通过 X 射线衍射 (XRD)、透射电子显微镜 (TEM)、傅里叶变换红外分光光度计 (FT-IR) 和振动样品磁强计 (VSM) 对新吸附剂的晶体和化学结构以及磁性进行了表征。通过响应面法优化了实验参数，以研究合成的吸附剂从水溶液中萃取铀酰离子的效率。铀酰离子在吸附剂上的吸附平衡符合 Langmuir 等温线，最大单层吸附容量为 12.33mg/g。该合成的吸附剂被应用于从不同水样中萃取铀酰离子。
