Removal of Aniline Blue and Methyl Violet from Solution using Chitosan/Biomass Based Activated Carbon Composite from Eggplant and Pomegranate peels

.E. El Dars, Farida M.S; Nouh, Aya E.; Mohamed, Sahar K

doi:10.21608/mjcc.2019.413047

Removal of Aniline Blue and Methyl Violet from Solution using Chitosan/Biomass Based Activated Carbon Composite from Eggplant and Pomegranate peels

Document Type : Original Article

Authors

Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Helwan, Cairo 11795, Egypt

10.21608/mjcc.2019.413047

Abstract

In this work, the removal of aniline blue (AB) and methyl violet (MV) from aqueous solution using chitosan (Cs) and chitosan/activated carbon biomass prepared from eggplant (CS/AC_E) and pomegranate peels (Cs/AC_P) was investigated. The respective Cs/biomass was formed from the carbonized eggplant and pomegranate peels which was activated with 0.1 M ZnCl₂prior to their incorporation. The dye removal process was studied in batch system with respect to the initial pH, contact time, temperature, adsorbent weight and the initial dye concentration. The results indicated that optimal (AB) and (MV) removal was achieved at pH₅ and after 5 h contact time. The experimental data was best fitted to pseudo-second-order model for both dyes based upon the obtained R² values. As well, the process followed the Freundlich isotherm model. The thermodynamic parameters (∆Hº, ∆Sº and ∆Gº) for the prepared adsorbents uptake of both dyes indicated that the process was endothermic and spontaneous for AB, however, it was non spontaneous for MV.

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