Document Type : Research Paper


Department of Chemical Engineering, College of Engineering, University of Al-Qadisiyah, Iraq



The primary objective of this study is to investigate the effectiveness of chitosan powder as an adsorbent for treating industrial wastewater contaminated with methyl orange. Chitosan is generally known in many academic fields and is readily available at a reasonable cost. Chitosan is a biopolymer derived from waste from marine fish scales. In the current study,  Methyl orange concentrations ranged In the water between 50 to 200 ppm. They were tested at different temperatures ranging from 25 to 40°C to evaluate the effectiveness of chitosan in removing dyes. The researchers conducted experiments to study kinetic and equilibrium processes, with a particular focus on analyzing the thermodynamic properties of the system. The study's results indicate that chitosan showed a high degree of effectiveness in removing methyl orange dye from contaminated industrial liquid waste. At 25 °C, the measured removal efficiency was 92.158%.In conclusion, this study presents experimental results demonstrating the feasibility of using chitosan as an adsorbent in treating industrial wastewater with methyl orange. The results of the equilibrium test indicate that the adsorption process begins during the initial 30-minute period. Chitosan is chemically effective for removing pigment pollutants from industrial water sources. Experimental results suggest that the adsorption process obeys Langmuir's law more accurately than the Freundlich model. The second-order model showed greater adherence to kinetics than the first-order model, as evidenced by the R2 value of 0.999.