Acta Periodica Technologica (Jan 2019)

Adsorption kinetics of Cr(VI) ions onto biochar from brewer’s spent grain

  • Kukić Dragana V.,
  • Vasić Vesna M.,
  • Panić Sanja N.,
  • Radosavljević Miloš S.,
  • Šćiban Marina B.,
  • Prodanović Jelena M.,
  • Blagojev Nevena T.,
  • Pejin Jelena D.

DOI
https://doi.org/10.2298/APT1950134K
Journal volume & issue
Vol. 2019, no. 50
pp. 134 – 142

Abstract

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In this paper adsorption kinetic of Cr(VI) ions onto biochar from brewer’s spent grain was studied. The same study was performed on biochar activated by KOH and H3PO4. Non-activated biochar showed a greater ability to bind Cr(VI) ions at the same initial concentration and 10 times lower dose compared to the brewer’s spent grain. The investigation of activation effect showed that it did not improve the adsorption properties of biochar. The analysis of kinetic data showed that the best description provided pseudo-second order equation and that adsorption takes place as chemisorption on all investigated adsorbents. Diffusion study showed that pore diffusion occurs only on biochar activated by phosphorus acid. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 43005 and Grant no. OI 172059]

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