Abstract

ORE JIMENEZ, Franklin; LAVADO MEZA, Carmencita  and  BENDEZU MONTES, Salvador. Biosorption of lead Pb (II) from residual waters of mine by corncob (Zea mays). Rev. Soc. Quím. Perú [online]. 2015, vol.81, n.2, pp.122-134. ISSN 1810-634X.

Removing lead ions was investigated from aqueous solutions using corncob (MRLZ) by a batch system, depending on the contact time, dose biosorbent, and initial pH of the solution and initial concentration of the solution of Pb (II). To determine the kinetic parameters, experimental data were correlated using three mathematical models (Peudo primer orden, Pseudo second order and Elovich). The experimental equilibrium data were correlated using two-parameter models: Langmuir and Freundlich; model that best adjusted was the Langmuir. The influence of competing ions observing a decrease in the percentage of biosorption of Pb (II) was studied. The MRLZ has a maximum capacity of monolayer biosorption 7,9 mg /g. It was possible to remove 97% of the Pb (II) content in mine wastewater.

Keywords : Biosorbent; mine wastewater; kinetics; equilibrium.

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