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Inicio Ciência & Tecnologia dos Materiais Application in chromium (VI) removal of natural and dried cactus
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Vol. 29. Issue 3.
Pages 145-152 (September - December 2017)
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Vol. 29. Issue 3.
Pages 145-152 (September - December 2017)
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Application in chromium (VI) removal of natural and dried cactus
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F. Sakr
Corresponding author
sakrfatima@gmail.com

Corresponding author.
, A. Sennaoui, M. Dinne, S. Alahiane, I. Bakas, M. Belmoden, A. Assabbane
Laboratory of Electrochemistry, Catalysis and Environment, Team Catalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco
Article information
Abstract

This research presents two type of cactus (Opuntia ficus-indica) (natural cactus (NC) and dried cactus (DC)) as a biological adsorbent, evaluated for the effectiveness of hexavalent chromium Cr(VI) removal from artificially contaminated aqueous solutions. The characterization of the biosorbents were made using different techniques such as X-ray Fluorescence (XRF), Fourier transform infrared (FTIR) and Scanning Electron Microscope (SEM) to better understand the adsorption mechanism-property relationship. Adsorption kinetics showed that the adsorption behavior followed the pseudo-second-order kinetic model. The adsorption isotherms fitted by the Langmuir model showed that the highest Cr(VI) adsorption capacities using natural cactus and dried cactus are 21.19 and 2.63mg/g respectively. Additionally, various physiochemical parameters such as contact time, adsorbent dosage, pH and temperature were investigated in a batch-adsorption technique. The results illustrated that the cactus have significant potential as economic, safe and effective adsorbent materials for the Cr(VI) adsorption from the aqueous solution.

Keywords:
Adsorption
natural cactus
dried cactus
hexavalent chromium
biosorbent
isotherms
kinetic
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