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Journal of Thermal Analysis and Calorimetry

, Volume 81, Issue 2, pp 435–440 | Cite as

Calorimetric study of the immersion heats of lead(II) and chromium(VI) from aqueous solutions of Colombian coffee husk

  • Y. Ladino-Ospina
  • L. Giraldo-Gutierréz
  • J. C. Moreno-Piraján
Article

Summary

This work shows the result of the study of the Pb(II) and Cr(VI) ions adsorption by means of a Calvet type calorimeter of heat conduction that can operate at 150şC. The calorimeter was electrically calibrated to establish its sensitivity and reproducibility, obtaining K=12.95±0.05 W V-1 and chemically it was examined with tris-(hydroxymethyl)-aminomethane (THAM)-HCl system, obtaining ΔH= -30.91±0.03 kJ mol-1. The activated carbon sample obtained from coffee husk and the calorimetric results obtained were related to other techniques used to perform this type of studies.

adsorption isotherm calibration of calorimeter immersion calorimetry 

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • Y. Ladino-Ospina
    • 1
  • L. Giraldo-Gutierréz
    • 2
  • J. C. Moreno-Piraján
    • 3
  1. 1.Chemistry Department Professor, Universidad Pedagógica Nacional de Colombia
  2. 2.Chemistry Department Professor, Calorimetry Laboratory, Universidad Nacional de Colombia
  3. 3.Chemistry Department Professor, Universidad de Los Andes, Research Group on Porous Solids and Calorimetry

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