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The Metztitlán lagoon is a shallow natural reservoir that is part of the Barranca de Metztitlán Biosphere Reserve; it is a highly vulnerable system due to the incorporation of wastewater, as well as seasonal variations in rain-drought cycles. The physicochemical evaluation of a series of water samples and superficial sediments allowed classifying the nature of the water as lithotrophic with a Ca-Mg-HCO3 facie, C2S1 salinity, and an average permeability of 44.53% that make it suitable for irrigation. Sediment mineralogy is mainly defined by calcite, quartz, plagioclases, and kaolinite. The evaluation of the enrichment factor and the geoaccumulation index showed a moderate enrichment of V, Mn, Cu, Zn, and Pb in the sediments, in addition to a positive geoaccumulation for V, Zn and Pb, indicating possible contamination with these metals.

Hidroquímica y geoacumulación de metales en sedimentos superficiales de la Laguna de Metztitlán, Hgo., México.