Highly improved chromium (III) uptake capacity in modified sugarcane bagasse using different chemical treatments
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.
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Main Authors: | Santos,Vanessa Cristina Gonçalves Dos, Salvado,Antonio de Pádua Andrade, Dragunski,Douglas Cardoso, Peraro,Débora Nobile Clausen, Tarley,César Ricardo Teixeira, Caetano,Josiane |
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Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2012
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000800021 |
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