Adsorption of Auramine-O Using Activated Globe Artichoke Leaves: Kinetic and Isotherm Studies

Abstract

The aim of this work was to study the removal of auramine-O (Au-O) from aqueous solution using powder prepared from globe artichoke leaves chemically activated with NaOH solution. The physico-chemical characteristics of the samples were performed and the characterization by FT-IR analysis has been carried out to examine the structure of globe artichoke leaves before and after activation. Scanning electron microscope was used to analyze the surface change of the globe artichoke leaves before and after adsorption of dye solution. A comparison of two models on the overall adsorption rate showed that the kinetic of adsorption was better described by the pseudo-second order model. The equilibrium data fitted very well to Langmuir model with maximum monolayer adsorption capacity of 344.8 mg g -1 at 298 K. This study shows that the globe artichoke leaves can be used as low cost alternative adsorbent for removal of auramine-O. Asian Journal of Chemistry; Vol. 29, No. 8 (2017), 1646-1650 as an adsorbent to remove the basic dyes auramine-O (Au-O) in an aqueous solution. The equilibrium analyzes were conducted to understand the sorption processes.

Sonocatalytic Tannery Effluent Degradation—Response Surface Methodology and Particle Swarm Optimization Embedded Artificial Neural Network Modeling Approach

“…A peak shift from 2922.17 cm −1 in the untreated effluent to 2109.83 cm −1 with a 97.73% transmittance in the treated effluent indicates the ─OH bond by intramolecular hydrogen bonding. [47] A medium peak at 1635.17 cm −1 is ascribed to C═C stretching in conjugated alkenes. A medium peak at 1098.41 cm −1 may be due to the C─H bending of alkane.…”