Sorption and speciation of heavy metals on hydrous Fe and Mn oxides. From microscopic to macroscopic

Manceau, Alain; Charlet, Laurent; Boisset, Marie-Claire; Didier, Beh Sima; Spadini, Lorenzo

doi:10.1016/0169-1317(92)90040-t

Cited by 258 publications

(159 citation statements)

References 42 publications

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“…4g and h). These results are in agreement with the spectroscopic observations of Manceau et al (1992) and Scheinost et al (2001) who found a major contribution of one Pb-Fe distance (3.30 Å ) characteristic of edge-sharing complexes. On the other hand, Trivedi et al (2003) also observed a long Pb-Fe distance, characteristic of corner-sharing complexes.…”

Section: Sorption Onto Hfosupporting

confidence: 82%

Metal ion binding to iron oxides

Ponthieu

Juillot

Hiemstra

et al. 2006

Geochimica et Cosmochimica Acta

144

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Section: Sorption Onto Hfosupporting

confidence: 82%

Metal ion binding to iron oxides

Ponthieu

Juillot

Hiemstra

et al. 2006

Geochimica et Cosmochimica Acta

144

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“…However in HFO, there appears only to be edge-sharing inner-sphere complexation. With Pb(II), an inner-sphere bidentate edge-sharing complex is formed on goethite (Bargar et al, 1997), but an inner-sphere multinuclear complex is formed on HFO (Manceau et al, 1992). For Se(VI) an outer-sphere complex forms on goethite (Hayes et al, 1987), but an inner-sphere bidentate complex forms on HFO .…”

Section: Surface Complexation Geometrymentioning

confidence: 99%

Nanoparticulate Iron Oxide Minerals in Soils and Sediments: Unique Properties and Contaminant Scavenging Mechanisms

2005

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Nanoparticulate goethite, akaganeite, hematite, ferrihydrite and schwertmannite are important constituents of soils, sediments and mine drainage outflows. These minerals have high sorption capacities for metal and anionic contaminants such as arsenic, chromium, lead, mercury and selenium. Contaminant sequestration is accomplished mainly by surface complexation, but aggregation of particles may encapsulate sorbed surface species into the multigrain interior interfaces, with significant consequences for contaminant dispersal or remediation processes. Particularly for particle sizes on the order of 1-10 nm, the sorption capacity and surface molecular structure also may differ in important ways from bulk material. We review the factors affecting geochemical reactivity of these nanophases, focusing on the ways they may remove toxins from the environment, and include recent results of studies on nanogoethite growth, aggregation and sorption processes.

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“…Francis y col. (68) describen un método para la separación de cadmio, cromo, níquel, plomo y zinc, coprecipitados con goethita por medio de un microbio anaerobio. Otros investigadores utilizaron goethita para la precipitación de selenio, uranio, plomo y cromo, afirmando que la elevada reactividad de los oxihidróxidos de hierro se debe a que los grupos hidroxilos forman unos espacios entre ellos que permiten la acomodación de los metales pesados (69). Otro estudio sobre la adsorción de Cr 3+ , Cd 2+ y Pb 2+ , con diferentes condiciones de fuerza iónica y de valores de pH, concluye que ésta es fuertemente dependiente del pH (70).…”

Section: Lagoethitaunclassified

La funcionalidad de los óxidos de hierro

Castaño¹,

Arroyave²

1998

REVMETAL

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Resumen Algunos óxidos de hierro tienen aplicaciones interesantes para las tecnologías actuales y futuras.Aparte de poseer propiedades adecuadas para cumplir diversas funciones, son relativamente abundantes en la naturaleza o su obtención en forma sintética no es complicada. En este artículo se presentan cinco de ellos (hematita, magnetita, maghemita, goethita y akaganeíta) y su utilización en campos como la industria química, la biotecnología, la medicina, los nuevos materiales y el electromagnetismo.Palabras clave: Magnetita. Hematita. Maghemita. Goethita. Akaganeíta. Functionality of the iron oxides AbstractSome iron oxides have a great scientific and technological possibilities, not only for their importance in the present, but also for their great potential in the development of the future technologies. They have adequate properties to carry out several functions. They are plentiful in the nature and their synthetic obtention is not complex. This paper shows five of them (hematite, magnetite, maghemite, goethite and akaganeite) and their utilization in fields like chemical industry, biotechnology, medicine, new materials and electromagnetism.

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Sorption and speciation of heavy metals on hydrous Fe and Mn oxides. From microscopic to macroscopic

Cited by 258 publications

References 42 publications

Metal ion binding to iron oxides

Metal ion binding to iron oxides

Nanoparticulate Iron Oxide Minerals in Soils and Sediments: Unique Properties and Contaminant Scavenging Mechanisms

La funcionalidad de los óxidos de hierro

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