Resumo

ACOSTA ARGUELLO, Henry Alexander; BARRAZA YANCE, Camilo Andrés  e  ALBIS ARRIETA, Alberto Ricardo. Adsorption of chromium (VI) using cassava peel (Manihot esculenta) as biosorbent: A kinetic study. Ing. Desarro. [online]. 2017, vol.35, n.1, pp.58-76. ISSN 0122-3461.  https://doi.org/10.14482/inde.35.1.8943.

In this research, cassava peel (Manihot esculenta) was used to remove chromium (VI) from aqueous solution simulating industrial effluents. Batch adsorption operation was used and tests were performed by vary ing the initial concentration of chromium solution (30, 40 and 50 ppm) and temperature (25, 30 and 35 °C), keeping fixed the adsorbent dosage (3.33 g/l), the contact time 40 minutos and pH 2, which was adjusted with sulfuric acid (H2SO4). Data were fitted to four kinetic models: reversible first-order, pseudo second-order, Elovich and intraparticle diffusion models. Pseudo second-order model fits best to most experimental data. Tests were also performed using an initial concentration of 50 ppm and contact time of 120 minutos, varying the adsorbent dosage (2, 4, 20 and 25 g/l). The higher adsorbent dosage is, the higher percent removal of Cr(VI) is observed.

Palavras-chave : adsorption; biosorption; chrome; kinetics; removal..

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