Details zur Publikation
Kategorie Textpublikation
Referenztyp Zeitschriften
Titel (primär) Scenarios of the distribution of lead in water, sediments and bacteria of lake Chapala, Mexico = Escenarios de la distribución de plomo en agua, sedimentos y bacterias del lago de Chapala, México
Autor Hansen, A.M.; Villa-Navia, A.; van Afferden, M.
Quelle Ingenieria Hidraulica en Mexico
Erscheinungsjahr 2006
Department UBZ
Band/Volume 21
Heft 2
Seite von 43
Seite bis 56
Sprache spanisch
Abstract To evaluate the distribution of lead in the natural resources of lake Chapala, the adsorption of this metal in bacteria was analyzed and, through published data and the application of a chemical equilibrium model, the risk associated with the consumption of fish and water was estimated. Adsorption experiments of lead in three bacterial strains and simulations of the distribution of lead in the water-sediment-bacteria system indicate that the distribution of lead in the lake depends on variations of water quality such as suspended solids, lead and biomass concentrations. Considering only the lead contained in the bottom sediments, the simulations suggest that concentrations do not exceed the limits nor the criteria for use and protection of water, sediments, and biota. Considering an additional source of lead that locally increases the concentration by a factor of ten, the amount of lead in water and sediments may exceed these limits. The bioaccumulation of lead in lake Chapala was evaluated through calculation of bioconcentration and biomagnification factors, using simulated and published data on lead in fish (Ayla Jay y Ford, 2001). The results indicate that lead may be concentrated 721 and 6,195 times in bacteria and fish, respectively. Furthermore, bioaccumulation of lead in the lake may occur mainly as bioconcentration in fish rather than biomagnification in the food chain
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=2680
Hansen, A.M., Villa-Navia, A., van Afferden, M. (2006):
Scenarios of the distribution of lead in water, sediments and bacteria of lake Chapala, Mexico = Escenarios de la distribución de plomo en agua, sedimentos y bacterias del lago de Chapala, México
Ing. Hidraul. Mex. 21 (2), 43 - 56