Argilas bentoníticas da península de Santa Elena, Equador: pilarização, ativação ácida e seu uso como descolorante de óleo de soja
| Autor: | Morales-Carrera,Ana M., Varajão,Angélica F. D. C., Gonçalves,Marcos A., Stachissini,Antônia S. |
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| Jazyk: | portugalština |
| Rok vydání: | 2009 |
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| Zdroj: | Química Nova v.32 n.9 2009 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ |
| Popis: | Two samples of calcic bentonite of the Santa Elena Peninsula, Ecuador, were pillared with Al13 ions in the ratio of 10, 15 and 20 meq of Al g-1 of clay, calcinated at 573, 723 and 873 ºK and acid activated with 4, 6 and 8 mol L-1 H2SO4. Analyses by X-ray diffraction, X-ray fluorescence, differential and gravimetric thermal, density, surface area and porosity, were applied in order to study the modifications occurred in the crystalline structure of the montmorillonite. The 8 mol L-1 H2SO4 acid-activated 15 meq of Al g-1 of clay at 573 ºK Al-pillared samples indicated the best results in the bleaching of the soybean oil measured by UV-visible spectrophotometer. |
| Databáze: | OpenAIRE |
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