Adsorption of phenol from aqueous solutions by organomontmorillonite

作者：Su, Jin; Lin, Hong-fu; Wang, Qing-Ping; Xie, Zheng-Miao; Chen, Zu-liang^*

来源：Desalination, 2011, 269(1-3): 163-169.

DOI：10.1016/j.desal.2010.10.056

• Phenol
• Organomontmorillonite
• Adsorption
• Wastewater

Na-montmorillonite was modified via an ion-exchange reaction with octadecyl dihydroxy ethyl methylammonium bromide (ODEM). The modified material (Na-Mt) was characterized by X-ray diffraction (XRD), Fourier transform infrared (FUR) spectroscopy. and Scanning electron microscopy (SEM). The basal spacing of the modified Na-Mt was 2.47 nm and the IR spectra of modified Na-Mt showed CH2 vibrations. The adsorption of phenol by modified Na-Mt from aqueous solution was indicative of a pseudo-second-order model which was used to calculate the corresponding rate constants (2.07 g/mg min(-1) at 308 K), and the Langmuir isotherms fitted the adsorption best, giving the highest adsorption capacity (384.61 mg/g at 308 K). The calculated thermodynamic parameters suggested that the adsorption of phenol onto modified Na-Mt was physisorptive, spontaneous and exothermic in nature.

• 出版日期2011-3-15
• 单位福建师范大学; 杭州电子科技大学