Fabrication of Zinc Oxide-Sawdust Composite Adsorbent for dyes removal

Abstract

For the benefit of humanity, the waste products from the paper, forestry, and lumber industries must be converted into commercially viable commodities due to their constant growth. This paper describes the creation and use of zinc oxide-incorporated sawdust as a new adsorbent for the removal of congo red (CR) and methylene blue (MB) from water. The UV–vis spectrophotometer was used to measure the amount of MB and CR adsorbed. The findings showed that variations in solution pH, nanocomposite dose, beginning concentration, temperature, and reaction time were related to the removal effectiveness of MB and CR. Using a concentration of 30–150 mg L^-1 and a temperature range of 5–30 °C, the adsorption equilibrium isotherm was determined.  The ZnO@SD nanocomposite has opportunities for more study and use in improving dye-containing effluent based on adsorption performance. Overall, the results suggest that the ZnO@SD composite is an effective, eco-friendly, and economical adsorbent for the treatment of dye-contaminated wastewater, offering significant potential for practical environmental remediation applications.