A Fixed Bed Adsorption Column Study for Synthetic Dye Wastewater using Magnetic Biochar

Abstract

The study aimed to investigate the performance of a fixed bed column using magnetic biochar as an adsorbent for synthetic dye wastewater treatment. The magnetic biochar was synthesized by pyrolyzing paper mill sludge at 350 ℃ and modified with iron oxide nanoparticles to enhance its magnetic properties. The adsorption capacity of the magnetic biochar was evaluated using methylene blue (MB) dye in wastewater. In present study the fixed bed column adsorption was conducted using MBC to treat MB wastewater. A fixed bed column setup was utilized in the experiments, maintaining a continuous flow rate of 15 mL/min at various bed height (i.e. 2.5, 5 & 7cm). Breakthrough & exhaustion capacity for each three different bed height at constant flow rate was also carried out. The Yoon-Nelson and Thomas kinetics models were also used in order to understand the dynamic performance of the fixed bed column. the respectively. The results shows that Yoon-Nelson model fitted best for the experimental data approximately R2 value of 0.96 against Thomas model R2 value of 0.95. Hence, it can be concluded that fixed bed column with MBC performed best with higher bed height & adsorption process is limited by film & pore diffusion