Isotherm Study of Methylene Blue (Mb) Adsorption on Activated Carbon Synthesized from Wheat Straw Biomass

Abstract

This research aims to investigate the adsorption behavior of methylene blue (MB) dye onto activated carbon (AC) synthesized from wheat stover. Activated carbon was prepared through a two-step process, involving carbonization of wheat stover followed by chemical activation. The synthesized activated carbon was characterized using various analytical techniques such as Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM)  done at 1500x and 179µm,1000x and 269µm 500x and 537µm and  at 1000x and 269µm Magnification for both the raw wheat stover and activated carbon. The adsorption process was studied through batch experiments, where the effect of various parameters such as initial MB concentration, pH, contact time, and temperature was evaluated. The Langmuir and Freundlich isotherm models were applied to analyze the equilibrium data and determine the adsorption capacity and intensity of the adsorbent calculations obtained for both models. For the Freundlinch model, it was 0.9956 while for the Langmuir model  was  0.9853.having the best fit for the experiment to be  freundluinch because it is  closest to 1. Overall, this study provides valuable insights into the adsorption behavior of methylene blue onto activated carbon synthesized from wheat stover. The findings contribute to the understanding of agricultural waste valorization for the production of effective adsorbents for water treatment applications, specifically in the removal of cationic dyes.