Two types of titaniferous sand (TS) of Taghazout (Agadir region) were prepared, using the sieving as a method of separation of grain sizes; ST(100-315μm) and ST(80-100 μm), for testing their adsorption capacity of methylene blue, from aqueous solution onto the sand (TS), 0.13mg/g and 0.24mg/g respectively, at the operating conditions, 25 mL of the methylene blue solution of initial concentration 10 mg/L within 30 min. The amount adsorbed optimal for both type of sand is observed in the vicinity of (pHZero) , it can be interpreted that the diffusive interactions are those that promote the adsorption process. Dubinin isotherm and the pseudo-second-order were found to be the best model to describe the adsorption process. the Thermodynamic studies revealed that a greater adsorption can be obtained at higher temperatures and the process was found to be endothermic physisorption. Accordingly, the sand (TS) was shown to be a very efficient and low cost adsorbent to remove the dyes from aqueous solutions, using a granulometric processing.