Elimination of a cationic dye by adsorption on two natural materials, olive pomace and peanut shells

H. Baloul, F. Abed, M. Touati


Abstract: This study focuses on the recovery of agro-food waste "olive pomace and peanut shells" in the field of industrial liquid effluent treatment.

The two materials were chemically activated by phosphoric acid while mixing them in different quantities and this by fixing the mass of the olive residue and by varying that of the shell of peanuts in order to obtain a homogeneous solution and to improve their adsorptive capacity.

In order to test the performance of the various adsorbents prepared, we were interested in the cationic dye basic yellow considered as polluting. The effects of several parameters such as contact time, initial concentration of dye, the pH of the solution, the temperature were studied in a batch system.

The study of the adsorption in batch system, made it possible to note that the optimum pH range for the elimination of the cationic dye studied, correspond to pH values greater than 4, the maximum adsorption capacity is about 42.73 mg/g obtained in the case of adsorbent (50% OP-50% PS) at a pH 8, and at a temperature of 40 °C.A modeling of the experimental results was carried out using the models Langmuir and Freundlich isotherms as well as a kinetic study using the equation of Pseudo-second order which has been found to be more consistent with experimental results.

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