Petrography, textural, morphological and structural characteristics of tuffite for Cu(II) removal. Effect of adsorption process variables

作者：Blanco Flores Alien; Ortega Hernandez Luis Ibrain; Toledo Jaldin Helen Paola; Sanchez Mendieta Victor; Cabadas Baez Hector Victor; Pi Puig Teresa

来源：Separation Science and Technology, 2018, 53(4): 598-612.

DOI：10.1080/01496395.2017.1404615

• Copper
• tuffite
• process variables
• ammoniacal medium
• adsorbers design

Tuffite has been studied for Cu(II) adsorption from aqueous and ammoniacal solutions. Tuffite was characterized by mercury porosimetry, Brunnauer-Emmet-Teller (BET), scanning electron microscopy-energy X-ray dispersive spectroscopy (SEM-EDS), Fourier transform infrared spectra (FTIR), X-ray powder diffraction (XRD), inductively coupled plasma-atomic emission spectrometry (ICP-OES) and petrographic microscopy. The equilibrium time was 50 min. The second-order model is the best model to describe the process. It was determined that the intraparticle diffusion was not the only limited step. Process variables were studied to improve the adsorption process. The material washed contributes to increase the Cu(II) adsorption from 213.05 to 276 mg/g. The flow countercurrent system requires at least 6 g of tuffite to achieve 90% of removal.

• 出版日期2018