Kinetic Assessment of Potential Toxic Elements Desorption from Contaminated Soil Ecosystems Irrigated with Low Quality Water

Objective: The rates of some Potential Toxic Elements (PTEs) release from three contaminated soil ecosystems with high zinc equivalent values were kinetically compared to select the best remediative management technique(s). Methodology: The sampled soil ecosystems were irrigated with either industrial effluent for more than 80 years (Kafr El-Sheikh site), sewage effluent for more than 50 years (Konbera site) or drainage water mixed with river Nile water for more than 35 years (Sinai site). A kinetic study of PTEs were applied using two empirical models i.e., Modified Freundlich Elovich (MFE), Hoerl and theoretical models, i.e., diffusion and 1st order equations were applied to rate PTEs desorption. Results: All trailed models well described the rate of PTEs desorption from the studied soil ecosystems.