磁性羧基功能化纳米多孔聚合物：合成、表征及其对亚甲基蓝的吸附应用
Magnetic carboxyl functional nanoporous polymer: synthesis, characterization and its application for methylene blue adsorption.
作者信息
Su Hongxin, Li Weiwei, Han Yide, Liu Ningning
机构信息
College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, P.R. China.
Department of Chemistry, College of Science, Northeastern University, Shenyang, 110819, P.R. China.
出版信息
Sci Rep. 2018 Apr 25;8(1):6506. doi: 10.1038/s41598-018-24873-3.
Magnetic carboxyl functional nanoporous polymer (MCFNP) was chemically fabricated by incorporation of magnetic FeO precursor into the carboxyl functional nanoporous polymer (CFNP). The as-synthesized MCFNP was characterized and used as an adsorbent for rapid adsorption removal of methylene blue (MB) from wastewater. Several experimental parameters affecting the adsorption efficiency were investigated including initial pH, adsorbent dosage, initial MB concentration, contact time and temperature. The adsorption behavior of MCFNP displayed that adsorption kinetics and isotherms could be well fitted to the pseudo-second-order and Langmuir models, respectively. The experimental results showed that MCFNP was an effective adsorbent with a maximum adsorption capacity of 57.74 mg g for MB at 298 K. The negative free energy (ΔG) and positive enthalpy change (ΔH) confirmed that the adsorption reaction was a spontaneous and endothermic process. In addition, ethanol was used as an effective extractant for the regeneration of MCFNP, and the adsorption efficiency could remain 80% after the ninth regeneration cycle.
通过将磁性FeO前驱体引入羧基功能化纳米多孔聚合物（CFNP）中，化学合成了磁性羧基功能化纳米多孔聚合物（MCFNP）。对合成的MCFNP进行了表征，并将其用作吸附剂，用于快速吸附去除废水中的亚甲基蓝（MB）。研究了影响吸附效率的几个实验参数，包括初始pH值、吸附剂用量、初始MB浓度、接触时间和温度。MCFNP的吸附行为表明，吸附动力学和等温线分别能很好地拟合准二级模型和朗缪尔模型。实验结果表明，MCFNP是一种有效的吸附剂，在298K时对MB的最大吸附容量为57.74mg/g。负自由能（ΔG）和正焓变（ΔH）证实吸附反应是一个自发的吸热过程。此外，乙醇被用作MCFNP再生的有效萃取剂，在第九次再生循环后，吸附效率仍可保持80%。
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