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Artículo

Benzalkonium Chloride Surface Adsorption and Release by Two Montmorillonites and Their Modified Organomontmorillonites

Flores, Federico ManuelIcon ; Lopez Loveira, Elsa GabrielaIcon ; Yarza, FlorenciaIcon ; Candal, Roberto JorgeIcon ; Torres Sanchez, Rosa MariaIcon
Fecha de publicación: 01/2017
Editorial: Springer
Revista: Water, Air and Soil Pollution
ISSN: 0049-6979
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

Benzalkonium chloride (BAC) loaded to montmorillonites (Mt) or organomontmorillonites (OMt) generates a functional material that can be incorporated to several systems (polymers, paints, etc) as a controlled release bactericide. Understanding the BAC adsorption sites on these adsorbents is of high importance to clarify their adsorption/desorption characteristics in aqueous media or other solvents. In this work, a thorough study about the adsorption/desorption properties of Mt and OMt with regards to BAC is presented, in order to evaluate further BAC release with the consequent aquatic environment contamination. In this work, the BAC adsorption on two different sites is demonstrated: the interlayer space and the external surface. Depending on BAC concentration in water, sorption of BAC at Mt occurred in two steps. At adsorbed amount <0.5 mmol g−1, there was an Mt interlayer expansion of 0.49 nm with no change of the external charge. At adsorbed amount >0.5 mmol g−1, there was a new interlayer expansion attaining 0.75 nm and the external charge shifted to positive value. In the case of OMt, the introduction of BAC produced changes in the interlayer structure and in the external surface charge. BAC desorption was strongly dependent on the type of Mt or OMt and extraction solvent, knowledge of which will allow its safe use in environmental friendly technological applications.
Palabras clave: Adsorption , Benzalkonium Chloride , Desorption , Montmorillonite , Organomontmorillonite
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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/11336/49183
DOI: http://dx.doi.org/10.1007/s11270-016-3223-2
URL: https://link.springer.com/article/10.1007%2Fs11270-016-3223-2
Colecciones
Articulos(CETMIC)
Articulos de CENTRO TECNOL.DE REC.MINERALES Y CERAMICA (I)
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Flores, Federico Manuel; Lopez Loveira, Elsa Gabriela; Yarza, Florencia; Candal, Roberto Jorge; Torres Sanchez, Rosa Maria; Benzalkonium Chloride Surface Adsorption and Release by Two Montmorillonites and Their Modified Organomontmorillonites; Springer; Water, Air and Soil Pollution; 228; 1-2017; 1-14
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