Carvão ativado a partir de resíduos de bambu ( Bambusa vulgaris ) utilizando CO2 como agente ativante para adsorção de azul de metileno e fenol

Bamboo (Bambusa vulgaris) wastes were used as raw material for producing activated carbon. The materials were collected and turned into activated carbons by carbonization (500 degrees C, 1.67 degrees C.min(-1), 60 min) and activation (800 degrees C, 10 degrees C.min(-1), 60 min) processes with CO2 (100 mL.min(-1)). The obtained material (CO2, AC) was characterized by its yield, elemental analysis, ash content, surface area (S-BET), Boehm titration method, scanning electron microscopy and used as adsorbent for removing the methylene blue and phenol contaminants. The Langmuir and Freundlich isotherm models were selected for understanding the adsorption process. CO2 AC produced showed yield of 21.6%, carbon content of 82.13% and S-BET of 856.78 m(2).g(-1), presenting rapid removal and high adsorption capacity for methylene blue (298.82 mg.g(-1)) and phenol (558.29 mg.g(-1))