Correlations between physico-chemical properties and nickel adsorption parameters in soils used in sanitary landfill liners

Published
2020-09-08
DOI: https://doi.org/10.14295/ras.v34i3.29914
Keywords: Heavy metals. Contamination. Surface and groundwaters. Batch equilibrium. Adsorption isotherms. Metais pesados. Contaminação. Águas Subterrâneas e Superficiais. Equilíbrio em Lote. Isotermas de adsorção.

    Authors

  • Ricardo Antonio Ferreira da Silva UNIVERSIDADE ESTADUAL DA PARAÍBA https://orcid.org/0000-0003-2866-8857
  • Danilo Brito da Costa UNIVERSIDADE FEDERAL DE CAMPINA GRANDE https://orcid.org/0000-0002-9459-190X
  • William de Paiva UNIVERSIDADE ESTADUAL DA PARAÍBA
  • Márcio Camargo de Melo UNIVERSIDADE FEDERAL DE CAMPINA GRANDE
  • Veruschka Escarião Dessoles Monteiro UNIVERSIDADE FEDERAL DE CAMPINA GRANDE

Abstract

The adsorption of heavy metals by sanitary landfill liners represents a measure of protection of surface and groundwaters against contamination by metals, mitigating risks to public health. Hence, this research aimed to identify, from correlations, the influence of physico-chemical properties of soils applied in landfill liners using nickel adsorption parameters. Batch equilibrium tests with initial nickel concentrations of 45 to 1440 mg.L-1 were performed in clayey sand and bentonite clay soil, as well as in mixtures. Nickel adsorption parameters from Freundlich and Langmuir isotherm models were obtained, exhibiting a better adjustment in the Freundlich model based on R² and RMSE criteria. Thus, the addition of bentonite clay improved the adsorption to nickel, and the cationic exchange capacity (CEC) was the property that considerably influenced the metal retention in the studied soils.

How to Cite
Silva, R. A. F. da, Costa, D. B. da, Paiva, W. de, Melo, M. C. de, & Monteiro, V. E. D. (2020). Correlations between physico-chemical properties and nickel adsorption parameters in soils used in sanitary landfill liners. Águas Subterrâneas, 34(3), 275–284. https://doi.org/10.14295/ras.v34i3.29914