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espanolSe modificaron quimicamente cascaras de yuca y name con acido citrico y se evaluo su comportamiento para la adsorcion de Pb(II). Los experimentos de adsorcion se llevaron a cabo usando un tamano de particula en el rango de 0.5 a 1mm y un pH de 6. La determinacion del metal remanente en solucion fue medida mediante espectroscopia de absorcion atomica. Se obtuvo una capacidad de adsorcion de 52.34 y 98.36mg/g para las cascaras de yuca y name respectivamente. Ademas, se encontro que el modelo de Elovich y la isoterma de Langmuir y Freundlich ajustan adecuadamente los datos experimentales de adsorcion. Se establece tambien que el enlace se da principalmente por fuerzas fisicas, formandose solo una monocapa. Se concluye que los materiales en estudio modificados quimicamente con acido citrico pueden ser usados para el tratamiento de aguas residuales, especificamente en la remocion de metales pesados como el plomo (II). EnglishCassava 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).

Aprovechamiento de Cáscaras de Yuca y Ñame para el Tratamiento de Aguas Residuales Contaminadas con Pb(II)