Elution of nickel ions from alginate beads in an acid media

Authors

  • Alvaro Aracena Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química
  • Francisco Cárcamo Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química
  • Óscar Jerez Universidad de Concepción, Instituto de Geología Económica Aplicada (GEA)
  • Robinson Constanzo Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química

DOI:

https://doi.org/10.3989/revmetalm.062

Keywords:

Alginate beads, Elution rate, Intrinsic kinetics, Nickel ions

Abstract


Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80 °C and a sulfuric acid concentration between 0.005 to 2.5 g L−1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80 °C and a H2SO4 concentration of 0.25 g L−1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H2SO4. Elution kinetics of nickel ions was studied, and the 1-(1-α)1/3=kappt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol−1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.

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References

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Published

2016-03-30

How to Cite

Aracena, A., Cárcamo, F., Jerez, Óscar, & Constanzo, R. (2016). Elution of nickel ions from alginate beads in an acid media. Revista De Metalurgia, 52(1), e062. https://doi.org/10.3989/revmetalm.062

Issue

Vol. 52 No. 1 (2016)

Section

Articles

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