Cocondensation and postfunctionalization methods were employed to synthesize a mesoporous silica with large surface area ( ± m2 g −1 ) modified with 4-amino-5-hydrazino-1,2,4-triazole-3-thiol, which was successfully applied to adsorb and preconcentrate Cu(II), Co(II), and Cd(II) from aqueous media. Infrared spectroscopy of the adsorbent material demonstrated N-H stretching bonds related to primary amines existing in the ligand molecule, elemental analysis revealed the presence of mmol g −1 of nitrogen, scanning electron microscopy indicated globularly shaped particles with average size of 10 µm, and the point of zero charge was found to be . Kinetic data were applied to the pseudo-second-order model, indicating that a chemisorption mechanism is probably involved in the uptake of metal ions from aqueous solutions. |
