Adsorptive Removal of Reactive Yellow 145 Dye from Textile Industry Effluent Using Teff Straw Activated Carbon: Optimization Using Central Composite Design

This study aimed to optimize the preparation condition of activated carbon using Teff straw as a precursor material via evaluating its potential in terms maximizing adsorptive removal Reactive Yellow 145 dye (RY 145) from aqueous solutions. Selective factors, such activation time, temperature, and impregnation ratio on Straw-based Activated Carbon (TSAC) were optimized response surface methodology (RSM). A quadratic regression model with estimated coefficients was developed by RSM it observed that predictions matched experimental value an acceptable R2 (0.98). Further, TSAC prepared at optimal characterized Fourier-transform infrared (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques. The showed anionic nature BET area 627.7 m2/g. In addition, important parameters (contact solution pH, adsorbent dose, concentration) evaluated through batch experiments. way, determined 2 h for 539 °C 5 g phosphoric acid per 1 efficient adsorption maximum 98.53% RY dye. subjected test order determine performance treating real textile industry effluent examining Chemical Oxygen Demand (COD) potential. results 76% COD removed effluent, which met Ethiopian Environmental Protection Authority (EPA) standard. finding this paper asserts is good low-cost bio-sorbent can be used pollutants wastewater. Nevertheless, additional investigations adsorbents including regeneration options are advisable draw explicit conclusions.