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

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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.

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Authors and Affiliations

  1. Chemistry Department Professor, Universidad Pedagógica Nacional de Colombia, Calle 72 No.12-09, Bogotá, Colombia

    Y. Ladino-Ospina

  2. Chemistry Department Professor, Calorimetry Laboratory, Universidad Nacional de Colombia, Ciudad Universitaria, Bogotá, Colombia

    L. Giraldo-Gutierréz

  3. Chemistry Department Professor, Universidad de Los Andes, Research Group on Porous Solids and Calorimetry, Carrera 1 No. 18 A 10, Bogotá, Colombia

    J. C. Moreno-Piraján

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  1. Y. Ladino-Ospina
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  2. L. Giraldo-Gutierréz
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  3. J. C. Moreno-Piraján
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Ladino-Ospina, Y., Giraldo-Gutierréz, L. & Moreno-Piraján, J. Calorimetric study of the immersion heats of lead(II) and chromium(VI) from aqueous solutions of Colombian coffee husk. J Therm Anal Calorim 81, 435–440 (2005). https://doi.org/10.1007/s10973-005-0803-6

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  • DOI: https://doi.org/10.1007/s10973-005-0803-6

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