Shalaby Th I, Fikrt N M, Mohamed M M, El Kady M F
Department of Medical Biophysics, Medical Research Institute, University of Alexandria, 16 Horria Avenue, El Hadra, Postal address 21561, Egypt E-mail:
Water Sci Technol. 2014;70(6):1004-10. doi: 10.2166/wst.2014.315.
This study investigated the applicability of magnetite Fe(3)O(4) nanoparticles coated with chitosan (CMNs) for the removal of some toxic heavy metals from simulated wastewater. Magnetic nanomaterials were synthesized using the co-precipitation method and characterized by transmission electron microscope, scanning electron microscope, X-ray diffraction, and Fourier transformer infrared spectroscopy. The magnetic properties of the prepared magnetic nanoparticles were determined by a vibrating-sample magnetometer. Batch experiments were carried out to determine the adsorption kinetics of Cr(VI) and Cd(II) by magnetic nanoparticles. It is noteworthy that CMNs show a highly efficient adsorption capacity for low concentration Cr(VI) and Cd(II) ions solution, which can reach 98% within 10 min.
本研究考察了壳聚糖包覆的磁铁矿Fe(3)O(4)纳米颗粒（CMNs）用于去除模拟废水中某些有毒重金属的适用性。采用共沉淀法合成磁性纳米材料，并通过透射电子显微镜、扫描电子显微镜、X射线衍射和傅里叶变换红外光谱对其进行表征。用振动样品磁强计测定所制备磁性纳米颗粒的磁性。进行批量实验以确定磁性纳米颗粒对Cr(VI)和Cd(II)的吸附动力学。值得注意的是，CMNs对低浓度Cr(VI)和Cd(II)离子溶液表现出高效的吸附能力，在10分钟内吸附率可达98%。
