biosorption of Cr(VI), passion fruit mesocarp, kinetics and equilibrium studies.

Authors

  • Yasmin de Jesus Costa Universidade Federal de Sergipe
  • Tiago Ferreira Souza Universidade Federal de Sergipe
  • Erivaldo Nascimento Reis Universidade Federal de Sergipe
  • Edilson Jesus Santos Universidade Federal de Sergipe

DOI:

https://doi.org/10.14808/sci.plena.2015.124201

Keywords:

biosorption of Cr(VI), passion fruit mesocarp, kinetics and equilibrium studies.

Abstract

This study proposed to evaluate the potentiality of passion fruit mesocarp (Passiflora edulis) as a biosorbent for the removal of hexavalent chromium [Cr(VI)] from aqueous solutions. The influence of pH, contact time and initial chromium concentration on the removal of Cr(VI) from the solutions was investigated. The biomaterial was obtained by thermal treatment at 400 °C. The determination of Cr(VI) was done by spectrophotometric UV-visible by complexation with 1,5-diphenylcarbazide, measuring the absorbance at a wavelength of 540 nm. The contact time necessary to attain equilibrium and the optimum pH were found to be 3 hours and 2.0, respectively. The kinetic of biosorption of Cr(VI) ions was described by a pseudo-second order kinetic model. The equilibrium isotherm data were analyzed using the Langmuir and Freundlich isotherm equations and the parameters were determined by non-linear mathematical programming. The sorption process was reflected by Freundlich isotherm. The results show that the biosorbent removed, approximately, 74% of Cr(VI) in 180 minutes, with maximum adsorption capacity of 13,0 mg g-1.

Author Biographies

Yasmin de Jesus Costa, Universidade Federal de Sergipe

Departamento de Engenharia Química.

Engenharia Química\Tecnologia Química

Tiago Ferreira Souza, Universidade Federal de Sergipe

Departamento de Engenharia Química.

Engenharia Química\Tecnologia Química

Erivaldo Nascimento Reis, Universidade Federal de Sergipe

Departamento de Engenharia Química.

Engenharia Química\Tecnologia Química

Edilson Jesus Santos, Universidade Federal de Sergipe

DEPARTAMENTO DE ENGENHARIA QUÍMICA

ENGENHARIA QUÍMICA

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Published

2015-12-04

How to Cite

Costa, Y. de J., Souza, T. F., Reis, E. N., & Santos, E. J. (2015). biosorption of Cr(VI), passion fruit mesocarp, kinetics and equilibrium studies. Scientia Plena, 11(12). https://doi.org/10.14808/sci.plena.2015.124201

Issue

Vol. 11 No. 12 (2015): December/Dezembro 2015

Section

Articles

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