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Activated carbon from bamboo (<i>Bambusa vulgaris</i>) waste using CO2 as activating agent for adsorption of methylene blue and phenol

2019; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 29; Issue: 2 Linguagem: Inglês

10.5902/1980509828648

1980-5098

Gregório Mateus Santana, Paulo Fernando Trugilho, Willian Miguel da Silva Borges, Maria Lúcia Bianchi, Juarez Benigno Paes, João Rodrigo Coimbra Nobre, Rayssa de Medeiros Morais,

Carbon Nanotubes in Composites

Bamboo (Bambusa vulgaris) waste were used as a raw material for producing activated carbon (AC). The materials were collected and turned into AC by carbonization (500 °C, 1.67 °C.min-1, 60 min) and activation (800 °C, 10 °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, methylene blue and iodine indexes, surface area (SBET), Boehm titration method, scanning electron microscopy and used as adsorbent for removing the methylene blue and phenol contaminants. The Langmuir and Freundlich isotherms models were selected for understanding the adsorption process. CO2 AC produced showed yield of 21.6%, carbon content of 82.13% and SBET of 856.78 m2.g-1, presenting rapid removal and high adsorption capacity for methylene blue (298.82 mg.g-1) and phenol (558.29 mg.g-1).