Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
Int J Biol Macromol. 2019 Jul 1;132:1031-1038. doi: 10.1016/j.ijbiomac.2019.04.004. Epub 2019 Apr 3.
In this study, highly porous N/S doped magnetic carbon aerogel (N/S-MCA) was successfully fabricated using sugarcane bagasse based cellulose and used for the removal of bisphenol‑A (BPA) from aqueous solution. The fabricated N/S-MCA nanocomposite derived from cellulose was characterized by various analytical techniques and supports the formation of the N/S-MCA in good yield and high purity. The batch adsorption studies were used for the adsorption of BPA onto N/S-MCA. The maximum removal of the BPA (98-99%) by the N/S-MCA was noted at pH 7, temperature 343 K, and initial BPA concentration of 100 ppm. The adsorption process followed pseudo-second-order reaction kinetics, as well as Langmuir isotherms. The thermodynamic parameters of the adsorption (the Gibbs free energy, entropy, and enthalpy) supported the spontaneity of the adsorption process. The results revealed that the mechanism on the synergistic adsorption between N/S doped magnetic carbon aerogel and BPA will therefore be an important guideline to design a carbon based adsorbent for high-efficient adsorption of environmental pollutants.
在这项研究中，成功地使用甘蔗渣基纤维素制备了高多孔 N/S 掺杂磁性碳气凝胶（N/S-MCA），并将其用于从水溶液中去除双酚 A（BPA）。所制备的源自纤维素的 N/S-MCA 纳米复合材料通过各种分析技术进行了表征，并支持以良好的收率和高纯度形成 N/S-MCA。分批吸附研究用于将 BPA 吸附到 N/S-MCA 上。在 pH 值为 7、温度为 343 K 和初始 BPA 浓度为 100 ppm 的条件下，N/S-MCA 对 BPA 的最大去除率为 98-99%。吸附过程遵循拟二级反应动力学和 Langmuir 等温线。吸附的热力学参数（吉布斯自由能、熵和焓）支持吸附过程的自发性。结果表明，N/S 掺杂磁性碳气凝胶与 BPA 之间协同吸附的机理将成为设计用于高效吸附环境污染物的基于碳的吸附剂的重要指南。
