Adsorption of hexavalent chromium on a coal beneficiation tailing material in batch and fixed-bed column

  • Keila Guerra Pacheco Nunes Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0001-7332-096X
  • Nathali Ribeiro Batistel Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0001-5844-6783
  • Dafne Barbosa Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0002-1236-5213
  • Ivan Reis Rosa Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0002-3104-1783
  • Ivone Vanessa Jurado Davila Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0002-7578-9152
  • Liliana Amaral Féris Programa de Pós-Graduação em Engenharia Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil http://orcid.org/0000-0002-5900-4474

Abstract

The objective of this work is to utilize a coal beneficiation tailing from Moatize (Mozambique) for the adsorption of hexavalent chromium from water in batch model and fixed bed column. Coal waste was used in particle size between 0.7 and 1.5 mm. The effects of pH, contact time and solid adsorbent concentration were analyzed by batch experiments. The results indicated that it was possible to obtain 98.6% of removal under the experimental conditions of pH 2, 10 h of process and 8 g.L-1 of solid adsorbent. From these experimental results, equilibrium isotherms were build and Langmuir and Sips models presented a better fit to the experimental data. The adsorption of chromium hexavalent from aqueous solution onto coal waste was investigated in a fixed bed column at 298 K. The effects of the inlet concentration, feed flow rate, bed depth on adsorption were investigated. In general, the evaluated parameters improved as a results increase in a Z (bed deep) and decreases in Q (feed flow rate). These performance metrics also improved as C0 (inlet concentration) was increased.

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Published
2020-05-25
How to Cite
NUNES, Keila Guerra Pacheco et al. Adsorption of hexavalent chromium on a coal beneficiation tailing material in batch and fixed-bed column. Acta Brasiliensis, [S.l.], v. 4, n. 2, p. 121-127, may 2020. ISSN 2526-4338. Available at: <http://revistas.ufcg.edu.br/actabra/index.php/actabra/article/view/209>. Date accessed: 10 dec. 2024. doi: https://doi.org/10.22571/2526-4338209.
Section
Environmental Chemistry