Adsorption of Indigo Carmine Dye onto Physicochemical-Activated Leaves of Agave Americana L

Dyes represent a serious threat to the environment when released in wastewaters. Hence, the main objective of this work was to design and fabricate an activated carbon from an invasive plant – Agave Americana L – capable of removing indigo carmine in aqueous solutions. The equilibrium adsorption of indigo carmine was assessed using the Freundlich, Langmuir, and Dubinin-Radushkevich isotherm model. The zinc chloride was used to activate the powder of Agave at ۶۰۰ °C and ۹۰۰ °C. The results of this work showed that the elaborated activated carbon had maximum adsorption of ۶۱.۷۲ mg/g and a specific surface area of ۳۸ m²/g determined using the BET method. The thermodynamic study showed that the adsorption of indigo carmine on the activated carbon was endothermic. Therefore, the activated carbon prepared from the Agave Americana L would be an efficient and cost-effective alternative adsorbent of indigo carmine and would have a positive effect on the environment.

کلیدواژه ها:

Agave Americana L ، Activated Carbon ، Adsorption ، indigo Carmine