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.