Fate of parabens and 4-hydroxybenzoic acid in aquifer materials columns during step experiments with fresh and sea waters
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Título: | Fate of parabens and 4-hydroxybenzoic acid in aquifer materials columns during step experiments with fresh and sea waters |
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Autor/es: | López Ortiz, Carmen | Boluda Botella, Nuria | Prats, Daniel | Sentana Gadea, Irene |
Grupo/s de investigación o GITE: | Recursos Hídricos y Desarrollo Sostenible | Equilibrio entre Fases | Diseño en Ingeniería y Desarrollo Tecnológico (DIDET) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Departamento de Expresión Gráfica, Composición y Proyectos | Universidad de Alicante. Instituto Universitario del Agua y las Ciencias Ambientales |
Palabras clave: | Parabens | 4-Hydroxybenzoic acid | Laboratory column | Reactive transport | Seawater intrusion | Sorption |
Área/s de conocimiento: | Ingeniería Química | Expresión Gráfica en la Ingeniería |
Fecha de publicación: | feb-2018 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Hydrology. 2018, 557: 335-347. doi:10.1016/j.jhydrol.2017.12.032 |
Resumen: | Coastal areas submitted to seawater intrusion and with discharges from urban and industrial wastewaters, municipal landfill leachates, rivers, recreational waters and other sources are sensitive to be polluted with parabens. Understanding the fate of these compounds in environmental studies, it requires previously the knowledge of the reactive processes in controlled conditions. In this research, laboratory columns experiments were carried out with a group of parabens (methyl-, ethyl-, propyl- and butylparaben) and their main degradation compound (4-hydroxybenzoic acid) to study mainly the dynamic sorption processes in different aquifer materials (100% sand and heterogeneous: 81% sand, 9% silt and 10% clay) and with fresh and sea waters, the end members of seawater intrusions. To the column hydrodynamic characterization, tracer assays with increase and decrease of salinity were performed, to obtain the mean residence time of each column and other transport parameters which allow us to compare parabens’ sorption in different conditions. The results of the adsorption and desorption of parabens in the sand column demonstrated be fast and simultaneous, with a short delay and without influence of the water salinity. Very different results were found in the column experiments with heterogeneous material, where the presence of clay and organic matter increase the time of adsorption/desorption as the length of the alkyl chain paraben increased, according with their hydrophobicity. It should be noted that despite the quick desorption of the major quantities of parabens, the elution of their trace concentrations was very slow (for the seawater, the buthylparaben required a dimensionless time of 800). Planning the restoration of a coastal aquifer with freshwater, and in the conditions of the studied sand column experiment, it will need a dimensionless time of 160. However, it is necessary to take into account that the studied parabens and 4-hydroxybenzoic acid are biodegradable substances, as can be seen in long term experiments, when bacterial proliferation could occur, despite starting the experiment under sterile conditions. |
Patrocinador/es: | This study was partially financed by the Ministry of Economy and Competitiveness via the project “Combined treatments for degradation and removal of emerging pollutants in water” (CTM2013-46669-R). |
URI: | http://hdl.handle.net/10045/72583 |
ISSN: | 0022-1694 (Print) | 1879-2707 (Online) |
DOI: | 10.1016/j.jhydrol.2017.12.032 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2017 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.jhydrol.2017.12.032 |
Aparece en las colecciones: | INV - Recursos Hídricos y Desarrollo Sostenible - Artículos de Revistas INV - DIDET - Artículos de Revistas INV - EQF - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2018_Lopez-Ortiz_etal_JHydrology_final.pdf | Versión final (acceso restringido) | 1,93 MB | Adobe PDF | Abrir Solicitar una copia |
2018_Lopez-Ortiz_etal_JHydrology_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,43 MB | Adobe PDF | Abrir Vista previa |
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