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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

TEJADA, Candelaria N; MONTIEL, Zaida  y  ACEVEDO, Diofanor. Utilization of Cassava and Yam Peels for the Treatment of Wastewater Contaminated with Pb (II). Inf. tecnol. [online]. 2016, vol.27, n.1, pp.09-20. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642016000100003.

Cassava and yam peels were chemically modified with citric acid and its performance for the adsorption of Pb(II) was evaluated. The adsorption tests were carried out using particle size between 0.5 and 1mm, and pH=6. The determination of the remaining metal in solution was measured by atomic absorption spectroscopy. These adsorption capacities were of 52.34 and 98.36 mg/g for cassava and yam peels, respectively. In addition, it was found that Elovich’s model and Langmuir's and Freundlich’s isotherms adequately fit the adsorption experimental data. It is also established that the bond occurs mainly due to physical forces, forming a single monolayer. It is concluded that the materials under study, which were chemically modified with citric acid, can be used for wastewater treatment, specifically for the removing of heavy metals such as lead (II).

Palabras clave : cassava peel; yam peel; waste materials; lead; residual waters.

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