Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 100, Issue -, Pages 161-165Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2012.04.061
Keywords
Raman; IR; Arsenic; Adsorption; Mn3O4; Magnetic composite
Categories
Funding
- CNPq
- Fapemig
- CAPES
- National Institute of Science and Technology on Mineral Resources, Water and Biodiversity (INCT-Acqua)
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Raman and IR spectra were recorded of the As-loaded Mn3O4 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). (c) 2012 Elsevier B.V. All rights reserved.
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