磁性有序介孔碳的制备及其对水中双酚A的吸附  

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

作　　者：毕薇薇 陈娅 马晓雁[1] 邓靖[1] BI Wei-wei;CHEN Ya;MA Xiao-yan;DENG Jing(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023

出　　处：《中国环境科学》2020年第11期4762-4769,共8页China Environmental Science

基　　金：国家自然科学基金(51978618,51808497);浙江省自然科学基金(LY18E080036,LY20E080021);浙江省教育厅科研项目(Y201636517)。

摘　　要：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.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.

关 键 词：磁性 有序介孔碳 吸附 双酚A 

分 类 号：X703.5[环境科学与工程—环境工程]