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

Química Nova

Peraro, Débora Nobile Clausen¹  Santos, Vanessa Cristina Gonçalves Dos¹  Caetano, Josiane¹  Universidade Estadual de Londrina, Londrina, Brasil¹  Universidade Paranaense, Umuarama, Brasil¹  Tarley, César Ricardo Teixeira¹  Salvado, Antonio de Pádua Andrade¹  Universidade Estadual do Oeste do Paraná, Toledo, Brasil¹  Dragunski, Douglas Cardoso¹ 

关键词: biosorption;    chromium;    sugarcane bagasse.;   

DOI  :  10.1590/S0100-40422012000800021

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown