Activated Carbons Impregnated with Na2S and H2SO4: Texture, Surface Chemistry and Application to Mercury Removal from Aqueous Solutions

Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10045/46296
Información del item - Informació de l'item - Item information
Título: Activated Carbons Impregnated with Na2S and H2SO4: Texture, Surface Chemistry and Application to Mercury Removal from Aqueous Solutions
Autor/es: Abdelouahab Reddam, Zinab | Wahby, Anass | El Mail, Rachad | Silvestre-Albero, Joaquín | Rodríguez Reinoso, Francisco | Sepúlveda-Escribano, Antonio
Grupo/s de investigación o GITE: Materiales Avanzados
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Palabras clave: Activated carbons | Na2S | H2SO4 | Mercury removal | Aqueous solutions
Área/s de conocimiento: Química Inorgánica
Fecha de publicación: mar-2014
Editor: Multi Science Publishing
Cita bibliográfica: Adsorption Science & Technology. 2014, 32(2-3): 101-115. doi:10.1260/0263-6174.32.2-3.101
Resumen: The effects of treatment of an activated carbon with Sulphur precursors on its textural properties and on the ability of the complex synthesized for mercury removal in aqueous solutions are studied. To this end, a commercial activated carbon has been modified by treatments with aqueous solutions of Na2S and H2SO4 at two temperatures (25 and 140 °C) to introduce sulphur species on its surface. The prepared adsorbents have been characterized by N2 (-196 °C) and CO2 (0 °C) adsorption, thermogravimetric analysis, temperature-programmed decomposition and X-ray photoelectron spectroscopy, and their adsorption capacities to remove Hg(II) ions in aqueous solutions have been determined. It has been shown that the impregnation treatments slightly modified the textural properties of the samples, with a small increase in the textural parameters (BET surface area and mesopore volumes). By contrast, surface oxygen content was increased when impregnation was carried out with Na2S, but it decreased when H2SO4 was used. However, the main effect of the impregnation treatments was the formation of surface sulphur complexes of thiol type, which was only achieved when the impregnation treatments were carried out at low temperature (25 °C). The presence of surface sulphur enhances the adsorption behaviour of these samples in the removal of Hg(II) cations in aqueous solutions at pH 2. In fact, complete Hg(II) removal is only obtained with the sulphur-containing activated carbons.
Patrocinador/es: The financial support by Generalitat Valenciana, Spain (PROMETEO/2009/002) is gratefully acknowledged.
URI: http://hdl.handle.net/10045/46296
ISSN: 0263-6174 (Print) | 2048-4038 (Online)
DOI: 10.1260/0263-6174.32.2-3.101
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © Multi-Science Publishing
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1260/0263-6174.32.2-3.101
Aparece en las colecciones:INV - LMA - Artículos de Revistas

Archivos en este ítem:
Archivos en este ítem:
Archivo Descripción TamañoFormato 
Thumbnail2014_Abdelouahab_etal_AS&T.pdf887,74 kBAdobe PDFAbrir Vista previa


Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.