4.7 Article

Raman and IR spectroscopic investigation of As adsorbed on Mn3O4 magnetic composites

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2012.04.061

Keywords

Raman; IR; Arsenic; Adsorption; Mn3O4; Magnetic composite

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Funding

  1. CNPq
  2. Fapemig
  3. CAPES
  4. 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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