Abstract
The desorption of cadmium (II) from mercaptoacetic acid modified and unmodified agricultural adsorbents following adsorption experiment was studied using five different desorbents. At the end of 25 minutes contact time the desorption efficiency followed the trend: 0.1 MHCl> 0.1 MH2SO4> 0.1 MHNO3> 0.1 MNaOH> hot deionized H2O for all three adsorbents (UOPF; 0.5 MOPF and 1.0 MOPF). Kinetic modelling of Cd2+ desorption using Elovich and pseudo-first order equations indicated that the pseudo-first order equation better described Cd2+ desorption from the surface of each adsorbent. The desorption rate constant β for 0.1MHCl were: 6.57 x10-1, 4.43 x10-1 and 3.98 x10-1 mg. mg-1min-1 for UOPF, 0.5MOPF and 1.0MOPF adsorbents respectively. While surface residence time, ح values for 0.1MHCl were; 31.4;33.8 and 30.72 seconds for UOPF, 0.5MOPF and 1.0MOPF adsorbents respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 89-97 |
| Number of pages | 9 |
| Journal | Global Journal of Environmental Sciences |
| Volume | 6 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2007 |