Removal of Methylene Blue Dye from Textile Industry Wastewater by Sawdust of Pistachio Tree

Introduction: Dyes are among dangerous contaminants that are often found in textile wastewater. These pollutants have significant health effects on humans, and destructive environmental effects on the ecosystem of aquatic plants and animals, and can alter the physicochemical properties of water. Hence, in this work, the methylene blue (MB) dye removal using sawdust of pistachio tree was investigated. Materials and Methods: This study was performed experimentally on a laboratory scale. The influence of various factors including dye concentration, pH of the solution, sawdust of pistachio tree dosage, and reaction time on dye removal efficiency was investigated. Results: The results showed that under optimized conditions of dye concentration of 50 mg L-1, pH of solution equal to 8.0, sawdust of pistachio tree dosage equal to 0.14 g L-1 and reaction time of 100 min, was 99.7%. The adsorption process follows the second order kinetics of R2= 0.9931 and the Langmuir isotherm R2= 0.9943. Conclusion: The adsorption process using sawdust of pistachio tree can be used as a high efficiency economic adsorbent in textile wastewater treatment.