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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. Num. 3.September - December 2017
Pages 79-152
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Vol. 29. Num. 3.September - December 2017
Pages 79-152
DOI: 10.1016/j.ctmat.2018.01.001
Application in chromium (VI) removal of natural and dried cactus
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F. Sakr
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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
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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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