Fig. 4. Measured and predicted breakthrough curves for the transport of B in columns a) G1, b) H, and c) K1 under pulse injection conditions. Observed data points were taken from Fig. 3. Predictions were made by using the LE-NE model and an average rate coefficient ₀ = 2.85. A pulse durations T_p = 5.85, 6.95, and 8.1 were used to simulate the experimental breakthrough curves from columns G1 (pH 6.9), H (pH 8.3), and K1 (pH 9.3), respectively.