Abstract
11 types of sorption-desorption equations were examined for evaluating breakthrough curve of cadmium. Mathematical models were solved numerically by the Shifting Particle Method and the calculated breakthrough curves were compared with the experimental results.
Some valuable results were obtained under the limits considered. These are as follows;(1) Different from the sigmoid curve, the observed breakthrough curve for cadmium sometimes shows tailing phenomenon;(2) Shifting Particle Method, proposed by G. F. Pinder et al. and improved by K. Ginno et al., was expanded successfully for estimating sorptive materials performances in the saturated zone; and (3) Observed breakthrough curve for cadmium was simulated well by the mathematical model. The model assumed that the cadmium takes two stable physico-chemical forms in the aqueous solution and are sorbed on the soil.
