Soil Science Society of America Journal · 1959 · 43 citations · 0 references
Natural SciencesChemical EngineeringChemistryChemical KineticsPhysical ChemistryTransport PhenomenaDiffusion In SolidsDiffusion-controlled ReactionsDiffusion-controlled ReleaseGeochemical KineticsMass TransferActivation EnergyControlled Diffusion ProcessesDiffusion KineticsFilm DiffusionIon Release KineticsMolecular DiffusionPotassium Release KineticsRate Limiting
Abstract Rate of release of fixed K from vermiculite with 0.1 N NaCl was studied to attempt to characterize the ratelimiting process. Of the processes considered, film diffusion satisfied most criteria as rate limiting. The activation energy of the release of K by 0.1 N NaCl in the system studied was about 3,550 cal./mole, a value of the order frequently obtained for diffusion processes.