Coal Fly Ash–Clay Based Geopolymer-Incorporating Electric Arc Furnace Dust (EAFD): Leaching Behavior and Geochemical Modeling

The recent recovery processes of electric arc furnace dust (EAFD) include stabilization within materials with potential uses in the construction sector. EAFD by alkaline activation different alumina-silicates, resulting low-cost and environmentally friendly materials. leaching standards European regulations allow evaluating waste products. This work aims to study introduction FA–clay geopolymers, assessing environmental geochemical behavior two scenarios, disposal, utilization. For it, compliance equilibrium-based batch test (EN 12457-2) pH dependence 14429) have been used. dosages geopolymeric matrix are 5% 20% curing temperatures 75 °C 225 °C. favors development flexural strength. From point view, metals related EAFD, such as Zn, Pb, or Cu, retained matrix. While As Se, comes mainly from clay, present a high concentration. Therefore, role clay should be analyzed future research. expected iron content complexes on surface material responsible for immobilization this type