Groundwater of geothermal systems of low temperature located in the Mexican Highlands is used as urban water supply due to water scarcity in the area. Juventino Rosas, Irapuato, Cuitzeo and Jocotitlan in Guanajuato and Mexico States, are some of the areas supplied with geothermal water. These aquifer systems are formed mainly by volcanic rocks of the Sierra Madre Occidental and the Trans Mexican Volcanic Belt. The groundwater of these systems contains some risk elements like arsenic and fluorine. Radon has been also detected in all the studied zones. Tectonic and subsidence faults and fractures allow a fast migration of Radon to surface. In Juventino Rosas the radon content range is 12,000 -40,000 Bq/m 3 . Health affectations related to radon exposure has not been reported. Geothermal water is also used for irrigation and cattle breeding. Arsenic can be absorbed by some crops. Some cheese producers reported low arsenic concentration in their products. The highest well temperature is 50 o C. Most of hot waters have temperatures between 27 and 33 o C. The groundwater temperature calculated with geothermometers in Juventino Rosas is higher than 100 o C. The water temperature can be used in some home-biased industrial processes. These systems cannot be used for big energy generation systems, but can increase the efficiency of solar energy systems. Water for human consumption is distributed directly from wells. The maximum arsenic concentrations were found in Cuitzeo and Irapuato, 3.8 mg/L and 0.30 mg/L respectively. In Juventino Rosas the fluorine content is causing dental fluorosis. In Irapuato there are a few cases of keratosis, one of the first health affectations related to arsenic ingestion. Water treatment could be one of the solutions. Only one small community in Irapuato has a treatment plant.
El presente estudio tiene por objeto demostrar que las propiedades fisicoquímicas de la roca Caliza Soyatal, localizada en la región de Zimapán Hidalgo (México), facilitan los niveles de adsorción de arsénico cuando la roca se pone en contacto con el agua contaminada, reduciendo considerablemente las concentraciones de dicho metal. Aunque la roca Soyatal contiene arsénico, las pruebas de desorción efectuadas indican niveles mínimos de dicho fenómeno. Las pruebas se realizaron usando torres empacadas con la roca Soyatal para eliminar el arsénico presente en el agua. Durante las pruebas de laboratorio se consideraron ciertas variables que determinan la eficiencia de remoción de arsénico: tamaño de partícula, tiempo de contacto, cantidad de roca y volumen de la muestra. A partir de los resultados, se puede concluir que esta investigación puede tener utilidad para implementar un tratamiento casero para tratar el agua de consumo humano proveniente del pozo Zimapán.
No abstract
Background: Reports in a northwestern Mexico state linked arsenic (As) in drinking water to DNA damage in people from indigenous communities. However, this correlation remains under discussion due to unknown variables related to nutrition, customs, and the potential presence of other metal(oid)s. Methods: To determine this association, we sampled water from three Yaqui towns (Cócorit, Vícam, and Pótam), and analyzed the metals by ICP-OES. We exposed four separate groups, with five male CD-1 mice each, to provide further insight into the potential effects of untreated drinking water. Results: The maximum concentrations of each metal(oid) in µg·L−1 were Sr(819) > Zn(135) > As(75) > Ba(57) > Mo(56) > Cu(17) > Al(14) > Mn(12) > Se(19). Histological studies revealed brain cells with angulation, satellitosis, and reactive gliosis with significant statistical correlation with Mn and As. Furthermore, the liver cells presented hepatocellular degeneration. Despite the early response, there is no occurrence of both statistical and significative changes in hematological parameters. Conclusions: The obtained results provide experimental insights to understand the potential effects of untreated water with low As and Mn contents in murine models. This fact is noteworthy because of the development of histological changes on both the brain and liver at subchronic exposure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.