Fig. 8. Experimental and simulated BTCs of SO₄ effluent concentrations from the Bs horizon [column Bs-II, input SO₄ (C_o) of 0.0005 M]. Simulations are based on best-fit of the data when a linear equilibrium model (dotted curve) and kinetic model (dashed curve) were used. The solid curve is a prediction based on the kinetic model.