Abstract
The pollutant transport through porous geological materials depends on intrinsic characteristics as the sorption. It is the main environmental aspect to evaluate attenuation and retardation of the pollutants, as well as the natural remediation capacity. Sorption is directly related to electrostatic change of the minerals, organic matter, oxides and hydroxides. A study to assess the sorption characteristics of the sandy residual unconsolidated material of the Botucatu Formation was developed using a multi component solutions of NaCl, KCl, ZnCl 2 and CuCl 2 .H 2 O with total concentration varying between 200 and 1000 ppm. The Langmuir I and Freundlich equations represented better the sorption behavior of Cu ++ , and the linear approximation was more adequate to represent K + and Zn ++ for two unconsolidated materials.
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