Anion Removal by Magnetic Carbon Xerogels: The Role of Fe3O4 Nanoparticles, Carbonization Temperatures, and H2O2 Surface Modification.

¹ Postgraduate department, CONAHCYT-Mexican Institute of Water Technology, 62574 Morelos, Mexico
² Irrigation and Drainage Department, CONAHCYT-Autonomous Agrarian Antonio Narro University, Saltillo, Mexico
³ Engineering in environmental technology, Polytechnic University of the State of Morelos
⁴ Renewable Energy Unit, Yucatan Scientific Research Center
⁵ Sustainability of Natural Resources and Energy, CINVESTAV Saltillo
⁶ Department of Bioscience and Agrotechnology, Research Center of Applied Chemistry

Academic Editor: Simeone Chianese

Published: 26 October 2023 by MDPI in The 4th International Electronic Conference on Applied Sciences session Energy, Environmental and Earth Science

https://doi.org/10.3390/ASEC2023-15290

Abstract:

Magnetic carbon xerogels composite with Fe₃O₄ nanoparticles (MNPs) prepared by co-precipitation can effectively remove arsenic (As(V) and As(III)) and fluoride ions from groundwater. The optimum conditions for the synthesis of these materials were studied, including the molar ratios of MNPs, and catalyst. Carbonization and post-synthesis treatment with H₂O₂-induced surface modification were applied. SEM and Fe analysis revealed the presence of Fe in the materials. This study provides a promising new method for the removal of arsenic and fluoride from groundwater, with the feasibility of reusing adsorbent and magnetic separation, which could have a significant impact on public health.

Keywords: Arsenic; fluoride; carbon xerogels; kinetic model; magnetic nanoparticles; surface modification

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