Por favor, use este identificador para citar o enlazar este ítem: http://repositoriodigital.ipn.mx/handle/123456789/19226
Título : Geochemical processes controlling the groundwater transport of contaminants released by a dump in an arid región of México
Autor : Gómez-Puentes, Francisco J.
Reyes-López, Jaime A.
López, Dina L.
Carreón Díazconti, Concepción
Belmonte-Jiménez, Salvador
Palabras clave : Dump site
groundwater evaporation
semi arid zones
heavy metals
Fecha de publicación : ene-2014
Editorial : Environ Earth Science
Citación : Volume 71;issue 2
Resumen : The Vado Carranza dump, located in the Mexicali Valley, Baja California, northwest Mexico, was operated for more than 15 years receiving about 30 tons/ day of solid wastes. The disposed wastes were periodically burned in open air. The presence of a shallow aquifer in the area makes the groundwater vulnerable to contamination processes. The purpose of this study was the evaluation of heavy metals content (Cu, Cd, Ni, Pb and Zn) in soil and groundwater in the vicinity of this dump. The results indicate high content of metals in soil, mainly at a superficial level, with the highest concentrations in the areas where burning of wastes occurred. Elevated concentrations of cadmium and copper were detected in groundwater with the highest concentrations occurring in monitoring wells located in the north side of the dump, downward of groundwater flow. Although the high content of metals in soil can be attributed to the burning of waste, other sources of pollution could be the agricultural irrigation in the vicinity of the dump. The program PHREEQC was used to model the geochemical evolution of groundwater. Results suggest that evaporation of the contaminated waters circulating below the landfill is one of the key processes that explain the increased concentration of contaminants in groundwater and its seasonal variations. As groundwater flows away from the dump, evaporation can concentrate the chemicals making the water more toxic. These results are important because they illustrate processes that are likely to occur in landfills located in other desert areas of the world.
URI : http://www.repositoriodigital.ipn.mx/handle/123456789/19226
ISSN : 1866-6280 print-version
1866-6299 electronic version
Aparece en las colecciones: Artículos

Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Geochemical processes controlling_Resumen.pdf433.67 kBAdobe PDFVisualizar/Abrir

Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.