one of the most effective and low cost technique widely studied
in recent years to remove dyes from wastewater. The adsorption
process uses an adsorbent, a material able to bind the toxic sub-stance or molecule to its surface. Adsorption methods are superior
to other techniques not only in terms of cost, but also in terms of
flexibility, simplicity of design, ease of operation, etc. Moreover,
adsorption methods do not produce secondary harmful substances
and the surface of an adsorbent can be functionalized and designed
in order to increase the adsorption performances toward the toxic
substances to be removed