ADSORPTION OF RHODAMINE B IN AQUEOUS SOLUTION BY ACTIVATED CARBON FROM THE SEED HUSKS OF MORINGA OLEIFERA

This paper presents the results obtained from the use of activated carbon from the seed husks of Moringaoleifera for removal of two dyes namely Rhodamine B aqueous solution artificially contaminated. This study was undertaken to highlight certain parameters such as contact time, the adsorbent mass, pH, initial concentration of adsorbate and ionic strength. The test results show that satisfactory operating conditions are made at a time of balance equal to 40 minutes, a weight of 0.01 g adsorbate, a basic pH (9) and high initial concentrations. The adsorption isotherms are in agreement with the four models namely Langmuir, Freundlich, Temkin and DKR. But it is the Langmuir model that better describes the adsorption of our dye with a maximum adsorption capacity of 16.07 mg/g. Adsorption kinetics is slow, pseudo second order, with a value of adsorption constant k2 equal to 0.423 g/min.g