Estimation of Iodine Leaching in Soil Amended with Organic and Inorganic Materials Using HYDRUS 1-D Model

This study investigated the ability of a HYDRUS 1D model for predicting vertical distribution potassium iodine (200 ppm) in soil columns after amendment with five different common remediation materials (gypsum, lime, fly ash, charcoal, and sawdust) at rate 2.5% (w/w), relative to an unamended control soil. Results showed that soil, leaching was decreased by all amendments but magnitude decreases varied applied. Iodine content highest upper layer progressively depth. The evaluated via comparison simulated values measured from column studies. results efficiency near 1, indicating stimulated values. Therefore, this through could be ascertained well using model. over predicted leaching, weak correspondence between leaching. suggests HYDRUS-1D does not explain accurately organic inorganic amended preferential flow occurs these columns. may due fact Freundlich isotherm, which is part transport equations, sufficiently describe mechanism adsorption onto particles. would help select effective management strategy reduce exogenous losses agro-ecosystems. also improve scientific understanding profile.