Abstract

ALBIS A., Alberto; MARTINEZ, Jader E.  and  SANTIAGO, Pablo J.. Removal of zinc (II) from aqueous solutions using cassava peel (Manihot esculenta): column experiments. Prospect. [online]. 2017, vol.15, n.1, pp.16-28. ISSN 1692-8261.  https://doi.org/10.15665/rp.v15i1.773.

A study was developed in a fixed bed column at laboratory scale to determine the adsorption capacity of zinc (II) in aqueous solutions using cassava peel (Manihot esculenta) as adsorbent, which was pretrea-ted and then characterized. It was evaluated the influence of several variables such as height bed (7 - 23 cm), initial concentration of zinc (II) (132 - 468 mg/L) and flow of the feed solution (7 - 23 mL/min) to determine the behavior of the removal process. Results showed that there was a better performance when the lowest flow of the feed stream, the lowest initial concentration, and the largest height of cas-sava peel bed were employed. The optimal rupture time is reached at an initial concentration of 480.23 mg/L, a feed rate of 23.35 mL/min and a height of cassava peel bed of 12.86 cm and it corresponds to 25.01 min. Additionally, it was determined that the rupture time behavior could be completely predic-ted in the intervals of interest by the BDST model.

Keywords : Removal; Zinc; Peel cassava; Fixed-bed column; Rupture time.

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