Removing lead ions was investigated from aqueous solutions using corncob (MRLZ) by abatch system, depending on the contact time, dose biosorbent, and initial pH of the solutionand 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 usingtwo-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. Itwas possible to remove 97% of the Pb (II) content in mine wastewater.

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 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, whic...

Se estudió la remoción de los iones de Pb(II) de soluciones acuosas utilizando la biomasa del marlo de maíz modificado químicamente con una solución 0,2 M de NaOH, mediante un sistema batch, lográndose incrementar la capacidad de adsorción en un 40% frente a su similar sin modificar (ZM). El marlo de maíz modificado (MZM) se caracterizó por espectroscopía infrarroja con transformadas de Fourier (FTIR) determinándose la presencia de grupos funcionales como OH y grupos carboxílicos los cuales estarían favoreciendo el proceso de biosorción, se determinó el área superficial siendo esta igual a 2,2 m2/g. Asimismo, se evaluó la capacidad de adsorción del MZM en función del tiempo de contacto, dosis del biosorbente, pH y concentración inicial de la solución de Pb (II). Las condiciones óptimas para la remoción de Pb(II) fueron 4g/L de MZM, tiempo de agitación de 60 minuto...