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Removing ions Pb (II) was investigated from aqueous solutions using biomass corn cob chemically modified with a 0,2 M NaOH solution, using a batch system, achieving 40% increase in adsorption capacity compared to similar unmodified (ZM). The corncob modified (MZM) was characterized by infrared spectroscopy Fourier transform (FTIR) determining presence of functional groups such as OH and carboxylic groups which would favor biosorption process, the surface area was determined to be the equal to 2,2 m2/g. Likewise, adsorption capacity versus time MZM contact biosorbent dose, pH and initial concentration a Facultad de Ingeniería Ambiental de la Universidad Continental, Av. San Carlos 1980 Huancayo, e-mail: clavado@continental.edu.pe b Facultad de Ingeniería Ambiental, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210 Rímac. LimaPerú Carmencita Lavado Meza, Franklin Oré Jiménez 404 Rev Soc Quím Perú. 82(4) 2016 of Pb (II) solution were evaluated. The optimal conditions for the removal of Pb (II) were 4g/L MZM, stirring time 60 minutes and pH equal to 5,0. The kinetic data were fitted to the model of Pseudo Second Order, experimental equilibrium data were better adjusted to the Langmuir model, which would indicate a monolayer biosorption. The MZM has a maximum capacity of biosorption of 12,44 mg / g.

ESTUDIO DE LA BIOSORCIÓN DE PLOMO DIVALENTE DE SOLUCIONES ACUOSAS USANDO BIOMASA MODIFICADA DE MARLO DE MAÍZ (Zea mays)