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

Química Nova

Vanessa Cristina Gonçalves Dos Santos²  Antonio De Pádua Andrade Salvado²  Douglas Cardoso Dragunski²  Débora Nobile Clausen Peraro¹  César Ricardo Teixeira Tarley¹  Josiane Caetano¹ 

[1] ,Universidade ParanaenseUmuarama PR ,Brasil

关键词: biosorption;    chromium;    sugarcane bagasse;   

DOI  :  10.1590/S0100-40422012000800021

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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