| 초록 |
An investigation has been conducted regarding the application of manganese nodule and leaching residue as the adsorbent for Cd2+ ion. The equilibrium adsorption behavior of Cd2+ ion was interpreted by several adsorption isotherms and the relevant experimental parameters have been estimated. Also, the adsorption/desorption features of Cd2+ ion were observed for several operational variables taking manganese nodule, its leached residue, and activated carbon as the adsorbent. The adsorbability of Cd2+ was found to increase with pH and the increase in ionic strength of solution hindered its adsorption for all adsorbents. The electrokinetic characteristics of adsorbents were investigation to understand its relationship with the adsorption behavior of adsorbate. Although little desorption of Cd2+ was observed in distilled water and dilute HCl solution for all adsorbents, it began to desorb as the concentration of HCl became high. The desorption behavior of Cd2+ was shown to be affected by the kind of adsobent and the solution conditions. |
