Capture of Co(II) from its aqueous EDTA-chelate by DTPA-modified silica gel and chitosan

▶ DTPA-modified silica gel and chitosan were effective adsorbents for Co(II). ▶ Removal of Co(II) was possible in the presence of EDTA, oxalate, and iron. ▶ Capture of Co(II) from its aqueous chelate was confirmed. ▶ Kinetic and isotherms models were used to support experimental findings.