ABSTRACT:This study was undertaken to investigate the adsorptive capacity of Adenia lobata fiber on MB dye. The experiments were carried out in a batch system to study the effects of adsorbent dosage, MB dye initial concentrations, P H , and contact time on the adsorptive capacity of the activated carbon fiber. The scanning electronic microscopy (SEM) revealed well pronounced porosity which indicated good possibility for the dye to be trapped and adsorbed. P H did not have much effect on the removal efficiency, the removal efficiency slightly increased as p H was increased from 2 to 10. The removal efficiency increased with the increase in dosage of the adsorbent while the adsorptive capacity decreased. The increase in initial concentration increased the adsorptive capacity but decreased the removal efficiency. The equilibrium adsorption data fitted well with intraparticle diffusion model but was not the only rate controlling step; boundary layer diffusion controls it to some extent. The thermodynamic parameters indicated the process as feasible and spontaneous. The process was endothermic at lower initial concentration and exothermic at higher initial concentration.

This work studied conventional regeneration of saturated activated carbon using muffle furnace. The activated carbon was prepared from brewer’s spent grain using carbonization and chemical activation with potassium hydroxide. It was saturated with methylene blue dye and regenerated using muffle furnace. Effect of 30% hydrogen peroxide (H202 ) as an oxidant in the regeneration process was studied. Adsorption – regeneration process was studied for six cycles. Regeneration condition was optimized using central composite design (CCD). Effect of regeneration temperature and time on the adsorptive capacity of regenerated carbon was studied for one cycle. Adsorptive capacity and regeneration efficiency were found to decrease with increase in the number of cycles. 30% H202 had a tremendous effect on the adsorptive capacity of the regenerated carbon. The adsorptive capacity increased as the temperature grew from 200°C to 500°C, but dropped after being raised to 6,000°C. Adsorptive capacity increased from 10 minutes to 30 minutes, but declined to 50 minutes. The Quadratic model was used to regenerate a long network of electronics devices. In this experiment, the parameters were exactly what were required for optimal adsorption: temperature of 537.76 degrees Celsius, time of 29.34 minutes, and an initial dye concentration of 100mg/L with estimated adsorptive capacity of 54.2827mg/L. This was an extremely small mistake of 0.02 percent following validation.