Microesferas de quitosana reticuladas com tripolifosfato utilizadas para remoção da acidez, ferro(III) e manganês(II) de águas contaminadas pela mineração de carvão
| Autor: | Jean Carlo Benassi, Mauro C. M. Laranjeira, Reginaldo Geremias, Rogério Laus, Amarildo Otavio Martins, Valfredo T. Fávere, Rozângela C. Pedrosa |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
chitosan-tripolyphosphate
Aqueous medium Metal ions in aqueous solution technology industry and agriculture chemistry.chemical_element Mineralogy General Chemistry Manganese macromolecular substances Microsphere Chitosan lcsh:Chemistry chemistry.chemical_compound microspheres Chemistry Adsorption chemistry Wastewater lcsh:QD1-999 remediation QD1-999 Chitosan microspheres Nuclear chemistry |
| Zdroj: | Química Nova, Vol 29, Iss 1, Pp 34-39 (2006) Química Nova v.29 n.1 2006 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ |
| ISSN: | 1678-7064 |
| Popis: | Considerable attention has been paid to chitosan and derivatives as efficient adsorbents of pollutants such as metal ions and dyes in aqueous medium. Nevertheless, no report can be found on the remedial actions of chitosan microspheres crosslinked with tripolyphosphate to control acidity, iron (III) and manganese (II) contents in wastewaters from coal mining. In this work, chitosan microspheres crosslinked with tripolyphosphate were used for the neutralization of acidity and removal of Fe (III) and Mn (II) from coal mining wastewaters. The study involved static and dinamic methods. The neutralization capacity of the surface of the static system was 395 mmol of H3O+ per kilogram of microspheres, higher than that of the dynamic one (223 mmol kg-1). The removal of Fe(III) in wastewater was of 100% and that of Mn(II) was 90%. |
| Databáze: | OpenAIRE |
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