Predicting Freundlich Adsorption Isotherm of Atrazine on Japanese Soils

概要

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It was possible to predict the amounts of atrazine adsorption on Japanese soils by deriving predicting equations from the value of the initial concentration of atrazine applied to the soils containing less than 70 g kg^<-1> carbon. The equations predicted the values of Freundlich isotherm coefficients, log K_F and 1/ n. Using the linear correlation between log K_F and 1/n for atrazine adsorption, Freundlich adsorption isotherm could be represented by using log K_F as a parameter. Predicting equations for log K_F were derived from the soil physico-chemical properties by multivariate analyses. Direct and indirect regressions to derive the predicting equations for log K_F were examined on the analyses. The better predicting equations were as follows ; 1/n=-0.16×1og K_F+0.99,log K_F=0.51+0.31×OM+0.08×TE+0.06×XA+0.04×XC, where OM, TE, XA, and XC denote the organic matter factor, the texture factor, the exchangeable acidity factor, and the exchangeable cations factor, respectively. These predicting equations estimated well experimental values of log K_F and 1/n.
社団法人日本土壌肥料学会の論文