毛竹基Fe-Co/C复合材料对水体中阿特拉津的去除

以毛竹为载体、铁钴复合盐溶液为前驱体,采用水热浸渍法制备了毛竹基Fe-Co/C复合材料,并用扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(FT-IR)和比表面积分析仪(BET)对样品进行了表征分析。通过批量实验研究了Fe-Co/C复合材料对阿特拉津的吸附特性。该吸附材料对水体中阿特拉津显示了良好的吸附性能。在阿特拉津初始浓度为10.0 mg/L,溶液pH为7.0,吸附剂用量为0.4 g/L,反应温度为25℃时,阿特拉津的平衡吸附量为21.89 mg/g。吸附过程符合二级动力学模型和Langmuir吸附等温式。热力学结果表明,Fe-Co/C复合材料对阿特拉津吸附是自发吸热过程。红外结果表明,氢键是Fe-Co/C复合材料对阿特拉津吸附的主要作用力,孔隙效应和л-л电子共轭作用也可能促进复合材料对阿特拉津的吸附。

ATRAZINE REMOVAL FROM WATER BY MOSO BAMBOO BASED Fe-Co/C COMPOSITE

The moso bamboo based Fe-Co/C composite was prepared by hydrothermal impregnation with the bamboo as the carrier and iron-cobalt composite salt solution as the precursor, and characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Infrared spectroscopy (FT-IR) and specific surface area analyzer (BET). The adsorption process of Fe-Co/C composites for atrazine was investigated by batch experiments. The Fe-Co/C composite exhibited good performance for atrazine removal in water. The equilibrium adsorption capacity of the Fe-Co/C composite was 21.89 mg/g at pH of 7.0, initial concentration of 10 mg/L, dosage of the Fe-Co/C composite of 0.4 g/L and temperature of 25℃. The adsorption process of atrazine on the Fe-Co/C composite could be simulated by the pseudo-second-order model and Langmuir isotherm model. The thermodynamic results showed that the adsorption of atrazine on Fe-Co/C magnetic composite was an endothermic process. The thermodynamic analysis illustrated an endothermic and spontaneous process of atrazine removal using the Fe-Co/C composite. Infrared spectra revealed that hydrogen bonding was one of the major adsorption forces for atrazine on Fe-Co/C composite, and pore effect and л-л conjugate interaction may also promote the adsorption of atrazine on composites.