Author(s): A. Mahdavi; M. H. Omid; S. M. Kashefipour
Linked Author(s): Mohammad Hossein Omid, Seyed Mahmood Kashefipour
Keywords: Heavy metal; Pollutant transport; Sorption; Advection; Dispersion
Abstract: In this study a numerical model is developed to evaluate the kinetic and equilibrium sorption process of heavy metal transport transformation. The model was calibrated by the experimental results of cadmium and salt injection in a circular flume. The results indicate that the linearization method of estimating the sorption coefficients is an improper technique. It was also found that the pseudo second order model for the kinetic sorption improves the results relative to the first order model. The results also showed that the equilibrium capacity should be measured experimentally instead of estimating through the regression analysis. Comparison between the kinetic and equilibrium models also shows that assuming the equilibrium conditions underestimate the transport speed.
Year: 2009