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Artículo

Octyl glucoside derivatives: A tool against metal pollutants

Ferlin, Nadège; Grassi, Diego; Ojeda, Carlos Alberto; Castro, Mariano Javier LuisIcon ; Fernandez Cirelli, AliciaIcon ; Kovensky, Jose EduardoIcon ; Grand, Eric
Fecha de publicación: 09/2015
Editorial: Elsevier Science
Revista: Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

Derivatives of octyl glucoside modified by the introduction of a chemical function (carboxylic acid, hydroxamic acid) able to enhance the complexing properties of the surfactants toward metallic cations have been used as flotation collectors to remove various metallic cations from a water phase. Flotation experiments at the laboratory scale were performed on Fe(III), Cu(II), Cr(III), Cd(II), Zn(II), Ni(II) and As(III) aqueous solutions. The most interesting results were obtained in the extraction of Fe(III) and Cu(II). Interfacial properties were studied, and the effect of the polar head structure and anomeric configuration was analyzed. Structural variations have an influence on the efficiency and the foaming ability of these compounds. The introduction of a chelating functionality preserves the interfacial performances of these surfactants. Complexes equilibrium constants and species distribution diagrams for Fe(III) and the best flotation agents 2a and 2b were determined from multi-wavelength spectrophotometric pH titration. Both compounds showed analogous values for log â<sub>1</sub>, log â<sub>2</sub> and log â<sub>3</sub>. The bidentanted Fe(III)-hydroxamate species (2:1 surfactant-metal ratio) reached a maximum concentration in the pH range of 5.5-6.5. At this pH, the best results in the flotation experiments were obtained for both compounds.
Palabras clave: Sugar-Based-Surfactants , Interfacial-Properties , Flotation , Ion-Extraction , Iron(Iii) Complexes
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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/11336/46984
DOI: https://dx.doi.org/10.1016/j.colsurfa.2014.09.041
URL: https://www.sciencedirect.com/science/article/pii/S0927775714007638
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Articulos(INPA)
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Citación
Ferlin, Nadège; Grassi, Diego; Ojeda, Carlos Alberto; Castro, Mariano Javier Luis; Fernandez Cirelli, Alicia; et al.; Octyl glucoside derivatives: A tool against metal pollutants; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 480; 9-2015; 439-448
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