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Removal of Cd(II) ions from contaminated water by a new modified magnetic chitosan nano composite

机译：新型改性磁性壳聚糖纳米复合材料去除污水中的Cd（II）离子

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Magnetic chitosan nanocomposites are one of the more recent advanced groups of adsorbents used to remove contaminants from waste water. In this research, N- Nicotinyl-N', N"-bis (Hexamethylenyl) phosphoric triamide (HE) was used as an additive to form a new nanocomposite with the structure of chitosan / 5% Fe3O4 Nps/10% HE resulting in the highly efficient removal of Cd(II) ions from an aqueous solution. Several techniques were applied to characterize the new-fabricated nanocomposite: X-ray Powder Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDX), Field Emission Scanning Electron Microscopy (FE-SEM), Fourier transform infrared (FTIR) and vibrating sample magnetometer (VSM). Atomic Absorption Spectroscopy (AAS) was used to measure the removal percentage of Cd(II) ions from the contaminated water samples. Results showed that 15 mg of the nanocomposite could remove Cd(II) ions with a rate of 99.9% from 20 mL of its 100 ppm aqueous solution in pH=9 with contact time of 1h. Furthermore, the same amount of the nanocomposite was applied to remove Cd(II) ions from 20 mL of a real wastewater sample with a pH=9 and the same contact time. The resulting removal rate of Cd(II) ions was 99.5%.
机译：磁性壳聚糖纳米复合材料是用于清除废水中污染物的较先进的吸附剂组之一。在这项研究中，N-烟酰胺基-N'，N”-双（六亚甲基）磷酸三酰胺（HE）被用作添加剂，以壳聚糖/ 5％Fe3O4 Nps / 10％HE的结构形成新的纳米复合材料，高效去除水溶液中的Cd（II）离子几种技术被用来表征新型纳米复合材料：X射线粉末衍射（XRD），能量色散X射线光谱（EDX），场发射扫描电子显微镜（FE-SEM），傅立叶变换红外（FTIR）和振动样品磁强计（VSM）。原子吸收光谱法（AAS）测定了被污染水样中Cd（II）离子的去除率，结果表明15 mg的纳米复合材料可在20分钟的pH = 9的条件下从20 mL的100 ppm水溶液中去除Cd（II）离子，接触时间为1h，而且去除率达99.9％。 ）来自20 mL pH = 9和t的真实废水样品中的离子他的联系时间相同。所得的Cd（II）离子去除率为99.5％。

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