Redox II: Environmental Redox Reactions

This lecture delves deeper into redox reactions in natural waters, focusing on reduction potentials, electron transfer mediators, and the interpretation of reduction potentials. It covers the impact of electron acceptors' availability and microbial activity on redox potential, as well as the construction of pe-pH stability diagrams for natural waters. The lecture also explores the role of microorganisms in environmental redox reactions and the concept of the redox ladder. Practical exercises involve analyzing nitrogen redox reactions and understanding the impact of organic carbon influx on redox conditions in aquifers. The lecture concludes with a discussion on the environmental engineering challenge of redox zonation in aquifers due to leachate infiltration from landfills.