Evaluation of Sorption Capacity of Stem Carbon of Aerva Lanata (L). for Turquoise Blue Dye Removal from an Aqueous Solution

Abstract

Researchers are now focusing their efforts on the adsorption of pollutants, including dyes, from wastewater by using adsorbents obtained from plants biomass. Wastewater containing dyes is a major concern to both the environment and human health hence the need to address the problem of taking off the dyes of the wastewater. This paper is aimed at the synthesis of potassium hydroxide activated carbon (PHALC) from Aerva lanata (L) stem with high adsorption capacities for turquoise blue (TB) dye. All the necessary factors were investigated in a series of batch studies. Analysis of experimental data revealed that TB dye has a strong affinity for PHALC; the Langmuir isotherm model can account for these findings. The adsorption system follows pseudo-second-order model based on kinetic modeling and the process is endothermic and spontaneous based on thermodynamics.