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In this study, waste hairs of the enzymatic unhairing process (PPE) of tannery were used as adsorbents to remove lead of a solution. Waste hairs were treated with acid hydrolysis and used in the type batch adsorption experiments, to be examined the effect of pH on the adsorption and also to investigate the mechanism of adsorption for which studies adsorption isotherms and the adsorption kinetics of Pb (II) were performed on treated hairs. The results showed that adsorption of Pb (II) was pH dependent with the optimum pH of 7. Isotherm studies showed that experimental data match the pattern of the Langmuir isotherm for the case of treated hairs of the enzymatic unhairing process (PTPE). The maximum adsorption capacity was 321.20 mg Pb (II)/g of bioadsobent (PTPE). The kinetic studies showed that a* Centro de Investigación en Química, Toxicología y Biotecnología Ambiental del Departamento de Química de la Facultad de Ciencias de la Universidad Nacional Agraria La Molina. Lima-Perú. e-mail: carolapa16@gmail.com b Helianthus SAC, Laboratorio de desarrollo e investigación curtiembre, Av. Guardia Civil 314 Chorrillos LimaPerú. Recibido el 14-03-2016 Aprobado el 30-06-2016 Carmen Carola Palomino Amorína; Rocío Vargas Parker; Lizardo Visitación Figueroa 184 Rev Soc Quím Perú. 82(2) 2016 the reaction model of pseudo-second order best describes the adsorption process. Finally, the study showed that residues of hairs of the enzymatic unhairing process can be used as effective adsorbents for the removal of lead (II).

APROVECHAMIENTO DE PELOS DE VACUNO DEL PROCESO DE PELAMBRE ENZIMÁTICO DE LAS CURTIEMBRES EN LA REMOCIÓN DE PLOMO