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Artículo

Arsenic Adsorption on Iron-Modified Montmorillonite: Kinetic Equilibrium and Surface Complexes

Iriel, AnaliaIcon ; Marco Brown, José LuisIcon ; Diljkan, Maja; Trinelli, Maria AlciraIcon ; Dos Santos Afonso, María; Fernandez Cirelli, AliciaIcon
Fecha de publicación: 01/2020
Editorial: Mary Ann Liebert
Revista: Environmental Engineering Science
ISSN: 1092-8758
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
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Resumen

As(V) adsorption mechanisms on an iron-modified montmorillonite (Fe-Mt) were studied by analysis from kinetic and equilibrium perspectives, and applicability of Fe-Mt for As(V) removal from groundwater was evaluated. Iron-modified montmorillonite was characterized by Small Angle X-Ray Scattering (SAXS), Wide Angle X-Ray Scattering (WAXS) and scanning electron microscopy technique and an excellent performance for As(V) removal, even at neutral and basic pH values and high conductivity conditions, was determined. Moreover, As(V) adsorption was higher with the increasing of ionic strength of the solution. Both Langmuir and Freundlich models provided a suitable fit to the experimental data, and the maxima adsorption capacity was 6.3 g/kg. Kinetic studies indicated that about 99% of As(V) was removed in the first 30 min of time from a starting concentration of 3 mg/L following a pseudo-second order kinetic. Formation of inner-sphere complexes of As(V) at the surface of Fe-Mt was stated by evaluation of As(V) adsorption in the presence of Cl-, NO3-, and PO43- ions and of the zeta potential versus pH curves.
Palabras clave: ADSORPTION , ARSENIC , DRINKING WATER , MODIFIED CLAY MATERIALS
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/124158
DOI: http://dx.doi.org/10.1089/ees.2019.0220
URL: https://www.liebertpub.com/doi/10.1089/ees.2019.0220
Colecciones
Articulos (IIIA)
Articulos de INSTITUTO DE INVESTIGACION E INGENIERIA AMBIENTAL
Articulos(INPA)
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Iriel, Analia; Marco Brown, José Luis; Diljkan, Maja; Trinelli, Maria Alcira; Dos Santos Afonso, María; et al.; Arsenic Adsorption on Iron-Modified Montmorillonite: Kinetic Equilibrium and Surface Complexes; Mary Ann Liebert; Environmental Engineering Science; 37; 1; 1-2020; 22-32
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