CH to cotton fabric could provide a significant
enhancement of dye uptake from aqueous solution.
However, the adsorption phenomenon is usually
affected by many parameters, particularly
temperature. In fact, the temperature affects two
major aspects of adsorption: the equilibrium position
in relation with the exothermicity of the process and
the swelling capacity of the adsorbent. Thus,
adjustment of temperature may be required in the
adsorption process. The effect of temperature on the
adsorption of dyes such as AB74 is shown in Figure
10. As generally observed, the uptake capacity of
CH-cotton composite material decreases with
increasing temperature, due to the enhanced
magnitude of the reverse (desorption) step in the
mechanism. The interactions established between
CH-cotton and dyes are therefore reversible in this
case. This is possibly due to the exothermic effect of
the surroundings during the adsorption process