Vol. 33 No. 2 (2020): Revista ION
Articles

Optimization of the process of obtaining a natural pine bark adsorbent

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  • Marlon Manuel Cuetocue Petins,
  • Rodrigo Andrés Sarria Villa,
  • José Antonio Gallo Corredor,
  • Ricardo Benítez Benitez
Marlon Manuel Cuetocue Petins
Universidad del Cauca
Rodrigo Andrés Sarria Villa
Universidad del Cauca
José Antonio Gallo Corredor
Universidad del Cauca
Ricardo Benítez Benitez
Universidad del Cauca
DOI: https://doi.org/10.18273/revion.v33n2-2020005

Published 2020-11-12

Keywords

  • Tannins,
  • Crosslinking,
  • Adsorbent

How to Cite

Cuetocue Petins, M. M., Sarria Villa, R. A., Gallo Corredor, J. A., & Benítez Benitez, R. (2020). Optimization of the process of obtaining a natural pine bark adsorbent. Revista ION, 33(2), 61–70. https://doi.org/10.18273/revion.v33n2-2020005
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

The tannins present in the bark of Pinus patula have been extracted to develop an adsorbent through a crosslinking reaction, which occurs between the phenolic groups due to treatment with sulfuric acid, which is used as a crosslinking agent for polyphenolic groups present in the tannins. In the present study, the Box-Behnken design is used to maximize the performance of the crosslinking reaction and, therefore, to obtain the best mechanical properties of the prepared adsorbent. The response variable studied was the percentage yield of the reaction, and the independent variables evaluated in the Box-Behnken design included, Solid/Liquid ratio (grams of tannin/mL of H2SO4) (0.2-0.5 gmL-1), temperature (75-95 °C) and time (8-12 h). The verified statistical model estimates an optimal percentage yield of 73.81%, it is obtained with an S/L ratio of 0.499 gmL-1, temperature of 95 °C and reaction time of 10.45 h. The modification of the surface functional groups of the tannins was established by means of the IR spectra. The adsorbent had a BET surface area of 4.17 m2g-1.

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