Eliminación de metales pesados de las aguas residuales mineras utilizando el bagazo de caña como biosorbente

Abstract

The search for new treatments and technologies for the removal of toxic metals from wastewater have drawn attention to the biosorption. In this work the study of bagasse from sugarcane as biosorbent in removing lead and cadmium from mining wastewater sample. We studied the effect of pH, contact time, concentration of the metal species and kinetic biosorption. Best percent cadmium removal was 77.81% for a working pH equal to 6, and 99.76 to lead to a pH of 5, which is reached after 10 minutes. It is noted for both lead and cadmium to as the metal concentration increases the amount of metal increases adsorbed per gram of adsorbent. The experimental data of biosorption of lead and cadmium favorably reproduce Elovich models and pseudo second order, with correlation coefficients (R2 ) for lead 1 and cadmium from 0.9986.