Low-cost sorbent for the removal of aniline and methyl orange from liquid-phase: Aloe Vera leaves wastes

Khaniabadi, Yusef Omidi and Heydari, Rouhollah and Nourmoradi, Heshmatollah and Basiri, Hesam and Basiri, Hassan (2016) Low-cost sorbent for the removal of aniline and methyl orange from liquid-phase: Aloe Vera leaves wastes. Journal of the Taiwan Institute of Chemical Engineers. pp. 1-9.

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Abstract

In this study, Aloe Vera leaves wastes-based sulfuric acid modified activated carbon (AV-SAC) was ap- plied for the sorption of aniline as a health-toxic substance and methyl orange (MO) as a anionic dye from aqueous phase. The batch sorption system was used to assess the effect of different parameters in- cluding contact time, pH, adsorbent dosage, and adsorbate contents on the adsorption. The equilibrium was obtained at contact time of 60 min for both the adsorbates. The pH of 3 had a significant influence on the uptake capacities of aniline and MO from aqueous media. Fitting the experimental data to differ- ent kinetics and isotherms models indicated that the experimental data were well fitted by the pseudo- second-order kinetic and Freundlich isotherm models, respectively. The maximum monolayer adsorption capacities were acquired 185.18 and 196.07 mg/g for aniline and MO, respectively. Due to its low-cost and high uptake capacity, AV-SAC can be considered as one of the effective sorbents for wastewater treatment contains of aniline and MO.

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