Medical waste incineration fly ash as an effective adsorbent for removing dyes from textile effluent and methylene blue from synthetic aqueous solutions
Tanvir Ahmed, Mir Tanvir Al Biruni, S. M. Farhaduzzaman Azad, Mehedi Hasan
Abstract
This study explores the utilization of Medical Waste Incineration Fly Ash (MWIFA) as a cost-effective adsorbent for removing dye from textile wastewater and synthetic aqueous solutions. Various factors were investigated in batch experiments, yielding impressive dye removal efficiencies of up to 98%. Optimal conditions were determined at 7.5 g/L adsorbent dosage, 40-min contact time, and 200 rpm agitation speed. The Freundlich isotherm model demonstrated a better fit than the Langmuir model, while Lagergren's pseudo second-order kinetic model highlighted chemisorption dominance. Laboratory-scale experiments suggest that MWIFA has the potential to be a viable and cost-effective adsorbent for treating wastewater. However, careful evaluation of environmental impacts is essential for large-scale application.