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The adsorption capacity of two anionic textile dyes (RR120 and BB150) on DMSO intercalated Tunisian raw clay was investigated with respect to contact time, initial dye concentration, pH and Temperature. The equilibrium data were fitted into Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms. The kinetic parameters were calculated using pseudo-first order, pseudo second-order, intra-particle diffusion and Elovich kinetic models. The thermodynamic parameters (DH°, DS° and DG°) of the adsorption process were also evaluated.

Equilibrium, kinetics and thermodynamics studies of textile dyes adsorption on modified Tunisian clay