Obtención y caracterización de carbón activado obtenido de lodos de plantas de tratamiento de agua residual de una industria avícola

The adsorption capacity of activated carbons, obtained from poultry slaughterhouse sludge was evaluated. The precursor was activated with H3PO4 10, 20, 30 and 35% in a 1: 1 ratio and pyrolyzed at 450 °C for 2 h in N2 atmosphere at a flow of 50 mL/min, obtaining the C10, C20, C30 and C35 carbons. The DARCOG60 was used as referential activated carbon. The adsorptive capacity of activated carbons obtained was evaluated, using the technique of methylene blue index (AM). The best adsorbent was characterized in terms of moisture content, ash content, bulk density and pH. Elemental composition (CHNO), infrared spectrophotometry FTIR and SEM scanning electron microscopy was determined. The C35 got higher dye adsorption (88.44% removal and 43.48 mg AM /g of C35). The DARG60 presented a 86.43% removal of AM. The carbon content in coal obtained poultry increase over the precursor slurry. The hydrogen content decreased significantly (sludge > carbon). The SEM photomicrographs, showed the appearance of a porous outer structure unlike the precursor carbon. FTIR reported the occurrence of several asymmetric carbon bands corresponding to different functional groups on their surfaces, evidencing an aromatic structure besides OH groups.