Isotherm Studies of Adsorption of Cadmium (II) ion from Aqueous Solution onto Zeolite: Effects of Time, Temperature and pH
AbstractToday, synthetic zeolites are used commercially additional frequently than natural zeolites due to the purity of crystalline products and the regularity of particle sizes. A synthesized Na3K6(H2O)21[Si27Al9O72] (Lind type L) LTL zeolite was characterized using X-Ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission Electron Microscopy (TEM). The work reports the utilization of synthesized zeolite as an adsorbent for the removal of cadmium (II) ion from aqueous solution. The effects of sorption time, temperature, heavy metal concentration and pH, on the adsorption process were investigated using a batch method. Langmuir, Freundlich, and Temkin isotherms over the entire concentration range from 20-50 mg.L-1 were used to narrate the adsorption isotherms and their constants evaluated. The equilibrium data were found to be fitted the Langmuir and Freundlich models. Our study shows that the maximum adsorption of Cd is at pH 8.0 and 313K.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.