Lecture
This lecture covers the reactivity of Fe oxy(hydr)oxides, focusing on the structure of goethite, protonation/deprotonation processes, inner-sphere complexation, and surface complexation models. It explains non-electrostatic adsorption, inner-sphere complex structures, and the transition from double layer to coprecipitation. The lecture also discusses surface complexation models with metal ions and anions, emphasizing the importance of goethite and ferrihydrite in decontamination processes. The key takeaway points include the development of surface hydroxyl groups, pH-dependent surface charge, non-electrostatic adsorption of heavy metal cations and oxyanions, and the role of surface complexation models in adsorption processes.