Effect of internal diffusivity of ferrous(II) cyanide complex ions in Ca-alginate immobilized Pseudomonas fluorescens gel beads on the Biodegradation rate

摘要

Combined biodegradation and internal diffusion effects on the biodegradation rate of ferrous(II) cyanide complex (ferro- cyanide) ions by Ca-alginate gel immobilized Pseudomonas fluorescens beads were investigated as a function of initial ferrocyanide concentration and particle size in a batch system. Assuming first-order biodegradation kinetics (v=kC), first-order biodegrada- tion rate constants for free and different sized immobilized particles were predicted and at 100 mg l~-1 bulk ferrocyanide ion concentration experimental effectiveness factors (η)were determined for each paritcle size.