杨其文,王圃.磁性高交联纳米吸附树脂的合成及其对酚类的吸附[J].环境科学学报,2021,41(8):3235-3242
磁性高交联纳米吸附树脂的合成及其对酚类的吸附
- The preparation of magnetic hyper-cross-linked polymeric nano adsorbent and its adsorption of phenolic pollutants
- 基金项目：教育部春晖计划项目（No.Z2015140）；重庆市教委科技研究项目（No.KJQN201801222）
- 杨其文
- 重庆大学, 环境与生态学院, 重庆 400030
- 王圃
- 重庆大学, 环境与生态学院, 重庆 400030
- 摘要：采用油酸双层包覆Fe3O4纳米粒子，然后进行共聚和交联反应，制备出耐酸性的磁性高交联纳米吸附树脂YQ-3.YQ-3树脂的比表面积为653.5 m2·g-1，平均孔径为4.12 nm，磁化强度为1.72 emμ·g-1，具有超顺磁性.苯酚（PN）、对苯二酚（HN）、对硝基苯酚（PNP）在YQ-3上的吸附等温线符合Freundlich方程，主要通过疏水和 π-π作用进行吸附.3种酚的饱和吸附量顺序为PNP>PN>HN，与其疏水性顺序一致.准一级动力学和颗粒内模型适合拟合YQ-3对酚的吸附，由于YQ-3磁性树脂具有较小的粒径和丰富的中-大孔隙，其动力学速率比传统超高交联树脂更快.
- Abstract：Magnetite Fe3O4 nanoparticles were dual-covered with oleic acid, then co-polymerization and post-crosslinking were carried out to prepare acid-resistant and high-crosslinking magnetic nano adsorption resin YQ-3. YQ-3 exhibited a specific surface area of 635.5 m2·g-1 and the average pore width of 4.12 nm.YQ-3 was superparamagnetic with a saturation magnetization of 1.72 emμ·g-1. The adsorption process of phenol (PN), hydroquinone (HN) and p-nitrophenol (PNP) on YQ-3 fitted the Freundlich equations and was mainly through hydrophobic and π-π action. The order of saturation adsorption of the three phenols was PNP>PN>HN, which was consistent with its hydrophobicity. The adsorption of phenols onto YQ-3 followed both pseudo-first-order and intra-particle model equations. YQ-3 displayed much faster kinetics than the other traditional hyper-cross-linked resins because of its small particle size and abundant macropores.
