BREAKTHROUGH CURVE IN ION EXCHANGE COLUMN

[摘要] References(7)Cited-By(13)Theoretical breakthrough curves for an ion exchange column are presented for the case where equilibrium constant based on mass action law is infinite and particle diffusion is the rate-controlling step. An effect of the electric field caused by the difference in diffusivity of counter ions on the breakthrough curves is evaluated by applying the Nernst-PIanck equation. Approximate equations are proposed for breakthrough curves whose maximum error from the exact solution is 4%. The theoretical values agree fairly well with experimental results in the R-H-NaOH system (equilibrium constant is infinite) and the R-Na-Ce(NO3)3 system (equilibrium constant is finite), respectively.