Physical and arsenic adsorption properties of maghemite and magnetite sub-microparticles

M. E. Mejia-Santillan; N. Pariona; J. Bravo-C.; M. Herrera-Trejo; F. Montejo-Alvaro; A. Zarate; D. L. Perry; A. I. Mtz-Enriquez

doi:10.1016/j.jmmm.2017.11.111

Physical and arsenic adsorption properties of maghemite and magnetite sub-microparticles

M. E. Mejia-Santillan, N. Pariona, J. Bravo-C., M. Herrera-Trejo, F. Montejo-Alvaro, A. Zarate, D. L. Perry, A. I. Mtz-Enriquez

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

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, Mössbauer 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.

Original language	English
Pages (from-to)	594-601
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	451
DOIs	https://doi.org/10.1016/j.jmmm.2017.11.111
State	Published - 1 Apr 2018

Bibliographical note

Funding Information:
This work was supported by the “Programa de Atracción e Inserción de Capital Humano Avanzado” MEC #80150069 and Proyecto Anillo ACT1204. The authors wish to thank the Archaeometry Lab (Universidad Nacional Mayor de San Marcos) for the Mössbauer measurements, and to the Magnetism Lab (Geology Department of UCN). DLP wishes to acknowledge support by the U.S. Department of Energy under Contract No. DE-ACO3-76SF00098 . MEM acknowledges Cinvestav, for supporting a research stay in Saltillo.

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Diffuse reflectance
First-order reversal curve (FORC) diagrams
Maghemite
Mossbauer spectroscopy
Sorption properties

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10.1016/j.jmmm.2017.11.111

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title = "Physical and arsenic adsorption properties of maghemite and magnetite sub-microparticles",

abstract = "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, M{\"o}ssbauer 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.",

keywords = "Diffuse reflectance, First-order reversal curve (FORC) diagrams, Maghemite, Mossbauer spectroscopy, Sorption properties",

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AU - Mejia-Santillan, M. E.

AU - Pariona, N.

AU - Bravo-C., J.

AU - Herrera-Trejo, M.

AU - Montejo-Alvaro, F.

AU - Zarate, A.

AU - Perry, D. L.

AU - Mtz-Enriquez, A. I.

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AB - 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, Mössbauer 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.

KW - Diffuse reflectance

KW - First-order reversal curve (FORC) diagrams

KW - Maghemite

KW - Mossbauer spectroscopy

KW - Sorption properties

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SN - 0304-8853

VL - 451

SP - 594

EP - 601

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Physical and arsenic adsorption properties of maghemite and magnetite sub-microparticles

Abstract

Bibliographical note

Keywords

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