Voltar
Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Highly improved chromium (III) uptake capacity in modified sugarcane bagasse using different chemical treatments

2012; Brazilian Chemical Society; Volume: 35; Issue: 8 Linguagem: Inglês

10.1590/s0100-40422012000800021

ISSN

1678-7064

Autores

Vanessa Cristina Gonçalves dos Santos, Antonio de Pádua Andrade Salvado, Douglas Cardoso Dragunski, Débora Nobile Clausen Peraro, César Ricardo Teixeira Tarley, Josiane Caetano,

Tópico(s)

Advanced Cellulose Research Studies

Resumo

The present paper focuses on improving chromium (III) uptake capacity of sugarcane bagasse through its chemical modification with citric acid and/or sodium hydroxide. The chemical modifications were confirmed by infrared spectroscopy, with an evident peak observed at 1730 cm-1, attributed to carbonyl groups. Equilibrium was reached after 24 h, and the kinetics followed the pseudo-second-order model. The highest chromium (III) maximum adsorption capacity (MAC) value was found when using sugarcane bagasse modified with sodium hydroxide and citric acid (58.00 mg g-1) giving a MAC value about three times greater (20.34 mg g-1) than for raw sugarcane bagasse.

Referência(s)