Effect of iron content on the catalytic properties of activated carbon-supported magnetite derived from biomass
| Autor: | Sirlene Barbosa Lima, Sarah Maria Santana Borges, Maria do Carmo Rangel, Sergio Gustavo Marchetti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
magnetite
Activated carbon Iron oxide Mineralogy dyes Catalysis Magnetite purl.org/becyt/ford/1 [https] chemistry.chemical_compound Adsorption medicine purl.org/becyt/ford/1.4 [https] activated carbon Ciencias Exactas Dyes Coconut shell Aqueous solution Methylene blue coconut shell Otras Ciencias Químicas Ciencias Químicas General Chemistry Hematite Environmentally friendly chemistry Chemical engineering visual_art visual_art.visual_art_medium methylene blue CIENCIAS NATURALES Y EXACTAS medicine.drug |
| Zdroj: | Journal of the Brazilian Chemical Society v.24 n.2 2013 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Journal of the Brazilian Chemical Society, Volume: 24, Issue: 2, Pages: 344-354, Published: FEB 2013 CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP |
| Popis: | In recent times, the intense human activity has led to an increase of the agriculture wastes in the environment. "In order to find new applications for these materials, the effect of iron content (2.5, 5, 10 and 15%) on the catalytic properties of activated carbon-supported iron oxide, prepared from coconut shells, was studied. The iron amount affected the textural and reducing properties of the solids and particle sizes. Hematite was found for the most iron-poor sample, while particles of magnetite with a core of hematite were found for the others. These catalysts were effective in the methylene blue removal from aqueous solutions by adsorption and Fenton reaction. The solid with 15% of iron was the most active one probably due to the highest iron amount on the surface. These catalysts are environmentally friendly, contributing to the decrease of the solid wastes in the environment as well as to purify textile effluents, preserving water resources. Nos últimos tempos, a intensa atividade humana levou a um aumento de resíduos agrícolas no meio ambiente. Visando a encontrar novas aplicações para estes materiais estudou-se, neste trabalho, o efeito do teor de ferro (2.5, 5, 10 e 15%) sobre as propriedades catalíticas de óxido de ferro suportado em carvão ativado, preparado a partir de cascas de coco. O teor de ferro afetou as propriedades texturais e redutoras dos sólidos. Detectou-se hematita na amostra mais pobre em ferro e magnetita com um núcleo de hematita nas demais. Estes catalisadores foram eficazes na remoção do azul de metileno em soluções aquosas por adsorção e pela reação de Fenton. O sólido com 15% de ferro foi o mais ativo, provavelmente devido à maior quantidade de sítios ativos na superfície. Estes catalisadores são ambientalmente amigáveis, contribuindo para a redução de resíduos sólidos no meio ambiente e purificação de efluentes têxteis, preservando os recursos hídricos. Facultad de Ciencias Exactas Centro de Investigación y Desarrollo en Ciencias Aplicadas |
| Databáze: | OpenAIRE |
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