ADSORPTION KINETIC STUDY OF CUPRIC ION ON ORGANO MONTMORILLONITE

Abstract

Commercially available montmorillonite K10 (Mt) was organically modified by grafting with tetramethylammonium (TMA) and tetrapropylammonium (TPA) cations to obtain potential adsorbents for adsorption metal cations. TMA-Mt and TPA-Mt showed FT-IR bands at 1489 cm^-1 and1389 cm^-1 attributed to C–N vibrations in tertiary amines and Æ¡_as (C–H) bending vibrations due to CH₃ groups of the (CH₃)₄N⁺ cation, indicating intercalation of Mt with TMA and TPA.  The kinetics of Cu(II) adsorption on these clay hybrids could be appropriately described by second order kinetics with the second order rate coefficients  found to be 1.06 x 10^-2, 9.00 x 10^-3 and 1.31 x 10^-2 L mg^-1 min^-1 respectively for Mt, TMA-Mt and TPA-Mt. Thus, this work has significantly highlighted the adsorption studies of Cu(II) ions on the montmorillonite and its derivatives.