Skip to main content

Advertisement

Log in

Multiple Approaches to Assess Copper Behavior in Soils from a Tropical Savanna Toposequence

  • Research paper
  • Published:
International Journal of Environmental Research Aims and scope Submit manuscript

Abstract

In the current study, sorption isotherms, and kinetic and thermodynamic experiments were carried out to assess copper behavior in four soils from a toposequence located in the Brazilian Tropical Savanna (Cerrado). Adsorption data were investigated using non-linear regressions based on the models of Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich. Results were better described by Freundlich model, where the constant KF, related to the maximum copper adsorption capacity, varied from 0.68 ± 0.04 to 0.13 ± 0.02 mg/g and was mainly influenced by organic matter and 2:1 clays, where less weathered soils present higher concentration of stable adsorption sites. Kinetic parameters revealed that chemisorption was the rate-limiting step, while thermodynamic experiments show that the copper adsorption was spontaneous, endothermic and occurs with increase in system disorder due to desolvation. In the toposequence, results evidenced higher probability of environment contamination in the ferralsols, since copper exhibits weaker interaction with soil binding sites, mostly iron and aluminum sesquioxides.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

Download references

Acknowledgements

The authors thank the National Council for Scientific and Technological Development (CNPq) for the financial support (480410/2012-7). The authors also acknowledge Dr. Tairone Paiva Leão (FAV/UnB) for his help in the soil texture analysis and Dr. Edi Mendes Guimarães (IG/UnB) for her assistance in obtaining the first results involving X-Ray Diffraction analysis. We are also grateful to the Federal Institute of Education, Science and Technology of Brasília (IFB) for giving a partial license to the first author carry out this research.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Fernando Fabriz Sodré.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Sena, M.M., Alcântara, G.B., Busato, J.G. et al. Multiple Approaches to Assess Copper Behavior in Soils from a Tropical Savanna Toposequence. Int J Environ Res 12, 189–201 (2018). https://doi.org/10.1007/s41742-018-0082-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s41742-018-0082-2

Keywords

Navigation