Highly improved chromium (III) uptake capacity in modified sugarcane bagasse using different chemical treatments
| Autor: | César Ricardo Teixeira Tarley, Vanessa Cristina Gonçalves dos Santos, Débora Nobile Clausen Peraro, Douglas C. Dragunski, Antonio de Pádua Andrade Salvado, Josiane Caetano |
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| Rok vydání: | 2012 |
| Předmět: |
business.industry
Kinetics Biosorption Chemical modification chemistry.chemical_element General Chemistry sugarcane bagasse Biotechnology lcsh:Chemistry chemistry.chemical_compound Chromium Adsorption lcsh:QD1-999 chemistry Sodium hydroxide chromium Bagasse Citric acid business biosorption Nuclear chemistry |
| Zdroj: | Química Nova v.35 n.8 2012 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Vol 35, Iss 8, Pp 1606-1611 (2012) Química Nova, Volume: 35, Issue: 8, Pages: 1606-1611, Published: 2012 |
| ISSN: | 0100-4042 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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