磁性有序介孔碳的制备及其对水中双酚A的吸附

采用水热法成功制备了磁性有序介孔碳（Fe-OMC），用于吸附水中双酚A （BPA）.采用高倍投射电镜、X射线衍射仪、傅里叶红外光谱仪、比表面积分析仪和振动样品磁强计对Fe-OMC进行表征.结果表明，该吸附剂具备较大的比表面积、独特的有序介孔孔道结构、丰富的含氧官能团以及较强的超顺磁性.Fe-OMC能够高效地吸附去除水中的BPA，平衡吸附量可达72.62mg/g，经过外加磁场分离回收后依旧具备较好的吸附性能.随着BPA浓度从1mg/L提高到20mg/L，其平衡吸附量由8.33mg/g增至91.78mg/g.随着pH值的升高呈现出先降低后升高再降低的趋势，最高吸附量出现在pH=8（75.34mg/g）.Fe-OMC对BPA的吸附过程可用准二级吸附动力学模型和Langmuir吸附等温模型进行描述.计算的热力学参数表明，Fe-OMC对BPA的吸附过程是自发进行的放热过程.

Synthesis of magnetic ordered mesoporous carbon and its adsorption of bisphenol A in water

Magnetic ordered mesoporous carbon (Fe-OMC) was successfully synthesized via hydrothermal route and applied as adsorbent for the removal of bisphenol A (BPA) in water. Through the characterizations of high resolution transmission electron microscopy, X-ray diffraction, specific surface area analyzer and vibrating sample magnetometer, the adsorbent possessed large specific surface area, unique ordered mesoporous pore structure, rich oxygen-containing functional groups and high super paramagnetism. During the application, Fe-OMC could effectively adsorb and remove BPA from water and the equilibrium adsorption capacity reached 72.62mg/g, and still maintained favorable adsorption ability after separation and recovery. With increasing BPA concentration from 1mg/L to 20mg/L, the equilibrium adsorption capacity increased from 8.33mg/g to 91.78mg/g. As solution pH raised, it presented a trend of first decreasing, then increasing and finally decreasing and the highest adsorption occurred at pH 8 (75.34mg/g). The adsorption process could be well described by pseudo-second-order adsorption kinetic model and Langmuir adsorption isotherm model. The calculated thermodynamic parameters illustrated that the BPA adsorption onto Fe-OMC was a spontaneous and exothermic process.