According to these figures (3.A and 3.B), the data prove that the capacity of the adsorption of the
natural banana peel (NBP) and activated one (ABP) increase with the initial concentration of MB in the
aqueous phase for a constant solid support (banana peel) to liquid (water) ratio r of 1g/L. Its means the
rise in the quantity adsorbed on the free active sites. A higher initial concentration provides an important
driving force to overcome all resistances of metal ions between aqueous and solid phases, thus increasing
the uptake. Also, increasing the initial ions concentrations of MB increases the number of collisions
between the dye ions and the adsorbent, hence enhancing the adsorption process.
The best percentage present it was with the activated support (ABP), it extinguishes its maximum
value of 98.540 % with a concentration of the MB of 25 mg/L, this percentage did not change perfectly
when the concentration increased for great values of 80 et 100 mg/l, in the contrary, the natural support it
reaches its maximum percentage of 93.448 % for the same concentration (25 mg/L) then it was started to