Department of Physical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran.
Department of Physical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran.
Int J Biol Macromol. 2023 Aug 1;245:125473. doi: 10.1016/j.ijbiomac.2023.125473. Epub 2023 Jun 19.
Recently, the leakage of Gasoil and other petroleum substances into the seas, surface water, and wastewater has become a global problem; therefore, providing a solution to remove these pollutants seems vital. In the current research, we investigated the removal of floating Gasoil from aqueous solutions. First, the magnetic metal-organic framework was prepared as a new adsorbent based on the cellulosic fibrous of the Prosopis farcta plant (magnetic- cellulose@MIL-53(Fe) carbon aerogel). Using design of experiment, the effect of parameters pH, Gasoil concentration, and adsorbent weight on Gasoil removal were investigated. The adsorbent prepared under optimal parameters can remove 100% floating Gasoil from the aqueous solution. The adsorption capacity of the magnetic- cellulose@MIL-53 (Fe) carbon aerogel is 7.48 g.g, which is almost 100 times more than other Fe-based adsorbents. The study of the effect of time showed that the adsorption of Gasoil by the adsorbent is not dependent on time. Gasoil adsorption on magnetic- cellulose@MIL-53(Fe) carbon aerogel follows the Freundlich isotherm with a correlation coefficient of 0.9933. Thermodynamic factors Gibbs free energy, enthalpy, and entropy changes have been calculated. Accordingly, magnetic- cellulose @MIL-53(Fe) carbon aerogel has rapid separation and high stability, and it could be used as a good adsorbent to remove Gasoil from an aqueous solution. With good cycling stability of 86% retention of the initial adsorption value after ten adsorption/desorption cycles.
最近，汽油和其他石油物质泄漏到海洋、地表水和废水中已成为一个全球性问题；因此，提供一种去除这些污染物的解决方案似乎至关重要。在目前的研究中，我们研究了从水溶液中去除浮油。首先，基于龙舌兰科龙舌兰属的纤维素纤维，制备了一种新型吸附剂磁性金属-有机骨架（纤维素@MIL-53(Fe) 碳气凝胶）。通过实验设计，考察了 pH 值、汽油浓度和吸附剂用量等参数对汽油去除的影响。在最佳参数下制备的吸附剂可将 100%的浮油从水溶液中去除。磁性纤维素@MIL-53(Fe) 碳气凝胶的吸附容量为 7.48 g.g，几乎是其他 Fe 基吸附剂的 100 倍。时间效应研究表明，吸附剂对汽油的吸附不受时间的影响。汽油在磁性纤维素@MIL-53(Fe) 碳气凝胶上的吸附符合 Freundlich 等温线，相关系数为 0.9933。计算了吉布斯自由能、焓和熵变化等热力学因素。因此，磁性纤维素@MIL-53(Fe) 碳气凝胶具有快速分离和高稳定性，可用作从水溶液中去除汽油的良好吸附剂。经过十次吸附/解吸循环后，其循环稳定性良好，保留了初始吸附值的 86%。
