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Inspección preliminar de algunas características de toxicidad en el agua potable domiciliaria, Bogotá y Soacha, 2012.

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Title: Inspección preliminar de algunas características de toxicidad en el agua potable domiciliaria, Bogotá y Soacha, 2012.
Alternate Title: Preliminary survey to detect toxic substances in domestic potable water, Bogotá and Soacha, 2012.
Authors: Silva, Elizabeth1 elisilvao@yahoo.com, Elsa Villarreal, María1, Cárdenas, Omayda1, Armando Cristancho, Carlos1, Murillo, Carmenza2, Alberto Salgado, Manuel3, Nava, Gerardo2
Source: Biomédica: Revista del Instituto Nacional de Salud. 2015 suplemento 2, Vol. 35, p152-166. 15p.
Abstract (English): Introduction: Significant alterations may be found in the water of Bogotá's water supply system after its purification, specifically during its distribution and storage in home reservoirs, which makes it necessary to study the final quality of the domiciliary water consumed by users. Objective: To conduct a preliminary study of toxic chemical substances in the water supplied by Bogotá's water supply system in samples obtained from residential reservoirs and faucets. Materials and methods: Descriptive study made in 26 homes located in Bogotá and Soacha. Two samplings were done during different seasons, each including a survey and the collection of water samples from domiciliary storage tanks and faucets. Samples were analyzed for basic physicochemical parameters, a screening test for organic and inorganic substances and the determination of heavy metals and residues of organophosphate pesticides and/or carbamates. Results: Values obtained for conductivity, color and nitrates were acceptable, pH and turbidity were slightly high while residual chlorine levels were low; aluminum traces were found in 94% of the samples; 8% of the samples analyzed during the dry season showed organic compounds, compared to 66.7% during the rainy season, and just one positive result was obtained for inorganic compounds. Consequently, a medium risk level was observed in 11.5% of homes, low risk in 61.5% and no risk in 27.0%. Conclusion: The evidence showed deterioration of the domiciliary water by organic substances present in the reservoirs as well as in the water supply piping, probably caused by the formation of biofilms or organic polymers. Aluminum levels close to the top permissible limit can be explained by the presence of residual coagulants used during water treatment. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): Introducción. La distribución y el almacenamiento del agua después de su potabilización, pueden originar cambios significativos en su calidad, por lo que es necesario conocer las características finales del agua domiciliaria que consumen los usuarios. Objetivo. Evaluar de forma preliminar las sustancias químicas tóxicas en el agua de tanques y grifos de viviendas abastecidas por el acueducto de Bogotá. Materiales y métodos. Se hizo un estudio descriptivo en 26 viviendas localizadas en Bogotá y Soacha. Se hicieron dos muestreos: uno en época de lluvias y otro en temporada seca, y en ambos se aplicó una encuesta y se recolectaron muestras de agua de los tanques de almacenamiento y los grifos. Las muestras se sometieron a ensayos fisicoquímicos básicos, a una prueba de tamización de sustancias orgánicas e inorgánicas, y a pruebas de determinación de metales pesados y de residuos de plaguicidas organofosforados y carbamatos. Resultados. La conductividad, el color y los nitratos presentaron valores permisibles; el pH y la turbiedad tuvieron una ligera tendencia a presentar niveles altos y, el cloro residual, niveles bajos. Hubo trazas de aluminio en el 94% de las muestras. En el período seco, 8% de las muestras presentó compuestos orgánicos y, en el período lluvioso, 66,7%. Solo hubo un resultado positivo para las sustancias inorgánicas. En el 11,5% de las viviendas, el nivel de riesgo fue medio, en el 61,5%, bajo, y en el 27% no se registró riesgo. Conclusiones. Se evidenció deterioro de la calidad del agua domiciliaria debido a la presencia de sustancias orgánicas en tanques y sobre todo en las redes, presumiblemente a causa de la formación de biopelículas o a la presencia de polímeros orgánicos. Los niveles de aluminio cercanos al máximo aceptable pueden explicarse por los remanentes de los coagulantes utilizados durante el tratamiento. [ABSTRACT FROM AUTHOR]
Copyright of Biomédica: Revista del Instituto Nacional de Salud is the property of Instituto Nacional de Salud of Colombia and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Inspección preliminar de algunas características de toxicidad en el agua potable domiciliaria, Bogotá y Soacha, 2012.
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  Data: Preliminary survey to detect toxic substances in domestic potable water, Bogotá and Soacha, 2012.
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  Data: <searchLink fieldCode="AR" term="%22Silva%2C+Elizabeth%22">Silva, Elizabeth</searchLink><relatesTo>1</relatesTo><i> elisilvao@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Elsa+Villarreal%2C+María%22">Elsa Villarreal, María</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cárdenas%2C+Omayda%22">Cárdenas, Omayda</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Armando+Cristancho%2C+Carlos%22">Armando Cristancho, Carlos</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Murillo%2C+Carmenza%22">Murillo, Carmenza</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Alberto+Salgado%2C+Manuel%22">Alberto Salgado, Manuel</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Nava%2C+Gerardo%22">Nava, Gerardo</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Biomédica%3A+Revista+del+Instituto+Nacional+de+Salud%22">Biomédica: Revista del Instituto Nacional de Salud</searchLink>. 2015 suplemento 2, Vol. 35, p152-166. 15p.
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: Introduction: Significant alterations may be found in the water of Bogotá's water supply system after its purification, specifically during its distribution and storage in home reservoirs, which makes it necessary to study the final quality of the domiciliary water consumed by users. Objective: To conduct a preliminary study of toxic chemical substances in the water supplied by Bogotá's water supply system in samples obtained from residential reservoirs and faucets. Materials and methods: Descriptive study made in 26 homes located in Bogotá and Soacha. Two samplings were done during different seasons, each including a survey and the collection of water samples from domiciliary storage tanks and faucets. Samples were analyzed for basic physicochemical parameters, a screening test for organic and inorganic substances and the determination of heavy metals and residues of organophosphate pesticides and/or carbamates. Results: Values obtained for conductivity, color and nitrates were acceptable, pH and turbidity were slightly high while residual chlorine levels were low; aluminum traces were found in 94% of the samples; 8% of the samples analyzed during the dry season showed organic compounds, compared to 66.7% during the rainy season, and just one positive result was obtained for inorganic compounds. Consequently, a medium risk level was observed in 11.5% of homes, low risk in 61.5% and no risk in 27.0%. Conclusion: The evidence showed deterioration of the domiciliary water by organic substances present in the reservoirs as well as in the water supply piping, probably caused by the formation of biofilms or organic polymers. Aluminum levels close to the top permissible limit can be explained by the presence of residual coagulants used during water treatment. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Spanish)
  Group: Ab
  Data: Introducción. La distribución y el almacenamiento del agua después de su potabilización, pueden originar cambios significativos en su calidad, por lo que es necesario conocer las características finales del agua domiciliaria que consumen los usuarios. Objetivo. Evaluar de forma preliminar las sustancias químicas tóxicas en el agua de tanques y grifos de viviendas abastecidas por el acueducto de Bogotá. Materiales y métodos. Se hizo un estudio descriptivo en 26 viviendas localizadas en Bogotá y Soacha. Se hicieron dos muestreos: uno en época de lluvias y otro en temporada seca, y en ambos se aplicó una encuesta y se recolectaron muestras de agua de los tanques de almacenamiento y los grifos. Las muestras se sometieron a ensayos fisicoquímicos básicos, a una prueba de tamización de sustancias orgánicas e inorgánicas, y a pruebas de determinación de metales pesados y de residuos de plaguicidas organofosforados y carbamatos. Resultados. La conductividad, el color y los nitratos presentaron valores permisibles; el pH y la turbiedad tuvieron una ligera tendencia a presentar niveles altos y, el cloro residual, niveles bajos. Hubo trazas de aluminio en el 94% de las muestras. En el período seco, 8% de las muestras presentó compuestos orgánicos y, en el período lluvioso, 66,7%. Solo hubo un resultado positivo para las sustancias inorgánicas. En el 11,5% de las viviendas, el nivel de riesgo fue medio, en el 61,5%, bajo, y en el 27% no se registró riesgo. Conclusiones. Se evidenció deterioro de la calidad del agua domiciliaria debido a la presencia de sustancias orgánicas en tanques y sobre todo en las redes, presumiblemente a causa de la formación de biopelículas o a la presencia de polímeros orgánicos. Los niveles de aluminio cercanos al máximo aceptable pueden explicarse por los remanentes de los coagulantes utilizados durante el tratamiento. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Biomédica: Revista del Instituto Nacional de Salud is the property of Instituto Nacional de Salud of Colombia and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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