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Sorption behavior of the sandy residual unconsolidated materials from the sandstones of the Botucatu Formation, the main aquifer of Brazil

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Abstract

Pollutant transport through porous geological materials depends on the intrinsic characteristics of the materials that define the sorption behavior. This is the main environmental aspect that must be evaluated in terms of natural attenuation and retardation factor of the pollutants. Sorption is directly related to the electrostatic charge of the mineral, the organic matter, and the oxide and hydroxide contents. We assessed the sorption characteristics of the sandy residual unconsolidated material of the Botucatu Formation, which is part of the main aquifer of Brazil, using Batch Equilibrium Tests. The tests used multicomponent solutions of NaCl, KCl, ZnCl2, and CuCl2·H2O with a total concentration that varied from 20 to 1,000 ppm. Different plotting systems were applied so that the isotherms better reflected the sorption behavior of the studied cations onto the unconsolidated materials. The cation Na+ was not sorbed. The Langmuir I and Freundlich equations adequately represent the behavior of Cu++, the Langmuir II approximation better represented K+, and the Langmuir I and Freundlich equations were reasonably fitted Zn++.

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Acknowledgments

This study was supported by the CNPQ under Project No 472091/2006-9 and FAPESP under Project No 2006/59445-9.

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Correspondence to Lázaro Valentin Zuquette.

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Fagundes, J.R.T., Zuquette, L.V. Sorption behavior of the sandy residual unconsolidated materials from the sandstones of the Botucatu Formation, the main aquifer of Brazil. Environ Earth Sci 62, 831–845 (2011). https://doi.org/10.1007/s12665-010-0570-y

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  • DOI: https://doi.org/10.1007/s12665-010-0570-y

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