Lecture
This lecture covers the modeling of kinetics in water quality using PHREEQC software. It explains reaction rates, equilibrium constants, half-life calculations, and residence times in the hydrosphere. Various reaction types and their activation energies are discussed, along with the effect of temperature on reaction rates. Examples of calcite precipitation and ferrous iron oxidation are presented, showing the dependence on pH. The lecture concludes with references to key publications in the field.