Physical and arsenic adsorption properties of maghemite and magnetite sub-microparticles
| Autor: | A.I. Mtz-Enriquez, A. Zarate, M.E. Mejia-Santillan, M. Herrera-Trejo, J. Bravo-C., F. Montejo-Alvaro, Nicolaza Pariona, Dale L. Perry |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Iron oxide Maghemite chemistry.chemical_element 02 engineering and technology 010501 environmental sciences engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake Adsorption chemistry Chemical engineering Mössbauer spectroscopy engineering symbols Diffuse reflection 0210 nano-technology Raman spectroscopy Arsenic 0105 earth and related environmental sciences Magnetite |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 451:594-601 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2017.11.111 |
| Popis: | The topotactic transformation from magnetite to maghemite sub-microparticles was demonstrated by a variety of techniques that include X-ray diffraction, Raman spectroscopy, electron microscopy, Mossbauer spectroscopy, magnetic measurements, and vis-NIR diffuse reflectance. The physical, chemical, and morphological properties of the particles were correlated with their adsorptive properties in water with respect to arsenic (V). The adsorptive properties of the iron oxide are increased by changing the crystal phases involved, specifically, the transformation of magnetite to maghemite. Maghemite sub-microparticles are capable of efficiently decreasing the arsenic content in water from 100 ppb to below the World Health Organization (WHO) guideline of 10 ppb. |
| Databáze: | OpenAIRE |
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