Raman and IR spectroscopic investigation of As adsorbed on Mn3O4 magnetic composites
| Autor: | Maria Sylvia Silva Dantas, Virginia S.T. Ciminelli, Fabiana S. Almeida, Gabriela C. Silva, Angela de Mello Ferreira |
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| Rok vydání: | 2013 |
| Předmět: |
Spectrophotometry
Infrared Inorganic chemistry chemistry.chemical_element Infrared spectroscopy Manganese Spectrum Analysis Raman Arsenic Analytical Chemistry symbols.namesake chemistry.chemical_compound Adsorption Composite material Instrumentation Spectroscopy X-ray absorption spectroscopy Magnetic Phenomena Temperature Arsenate Oxides Hydrogen-Ion Concentration Atomic and Molecular Physics and Optics XANES X-Ray Absorption Spectroscopy Manganese Compounds chemistry symbols Raman spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 100:161-165 |
| ISSN: | 1386-1425 |
| Popis: | Raman and IR spectra were recorded of the As-loaded Mn(3)O(4) magnetic composites obtained from the adsorption studies performed with As(III). XANES results for the composite after As(III) removal tests show that the As adsorbed is at the oxidized arsenic form, As(V). Monodentate and bidentate surface complexes are suggested for arsenic adsorption onto the composite (5-16 mg/g). Precipitation of manganese arsenate is observed for high As loading (35 mg/g). |
| Databáze: | OpenAIRE |
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