Spatial distribution and evaluation of environmental pollution by mercury in the Mojana region, Colombia

Distribución espacial y evaluación de la contaminación ambiental por mercurio en la región de la Mojana, Colombia

dc.creatorMarrugo Negrete, José
dc.creatorPinedo-Hernández, José
dc.creatorPaternina–Uribe, Roberth
dc.creatorQuiroz-Aguas, Liliana
dc.creatorPacheco-Florez, Sergio
dc.date2018-11-20
dc.date.accessioned2022-12-15T14:43:08Z
dc.date.available2022-12-15T14:43:08Z
dc.identifierhttps://revistamvz.unicordoba.edu.co/article/view/1481
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5353325
dc.description  Objective. To evaluate the distribution of total mercury (THg) in surface sediments, fish, hair, rice plants, and macrophytes, as well as the geoaccumulation index by THg in sediments and the risk potential for fish consumption in different municipalities affected by gold mining activities that have developed around in the Mojana region, Colombia. Materials and methods. The THg concentration was determined by thermal decomposition, using a direct DMA-80 mercury analyzer. Results. On average, the concentrations of THg in fish was 0.223±0.027 μg/g. Of the total fish samples, 11.6% exceeded the permissible limit established by the World Health Organization (0.5 μg/g), being 4.2% for non-carnivorous species and 7.4% for carnivorous species. Of the fish species, 76.9% showed risk index (HI) values greater than 1. The Geoaccumulation Index (Igeo) in sediments shows a contamination degree from non-polluted to moderate pollution for the different sampling stations. Hair THg concentrations ranged between 0.17- 8.8 μg/g. Of the population, 47% exceeds the permissible limit established as a reference by the USEPA (1 μg/g). THg concentrations in macrophytes (Eichhornia crassipes) and rice crop plants were higher in sampling stations that receive water currents that carry contaminating loads from mining areas, a similar trend presented for sediments and fish. Conclusions. Mining activities have generated a process of gradual contamination by Hg in the food chain and currently levels in fish, rice and hair represent a serious concern for human health.en-US
dc.descriptionObjetivo. Se evaluó la distribución de mercurio total (HgT) en sedimentos superficiales, peces, cabello, plantas de arroz y macrofitas, como también el índice de geoacumulación por HgT en sedimentos y el potencial de riesgo por consumo de pescado en diferentes municipios afectados por actividades de minería aurífera que se han desarrollado alrededor en la región de la Mojana, Colombia. Materiales y métodos. La concentración de HgT se determinó mediante descomposición térmica, utilizando un analizador directo de mercurio DMA-80. Resultados. En promedio, las concentraciones de HgT en peces fueron 0.223 ±  0.027 μg/g. Del total de las muestras, 11.6% de peces sobrepasaron el límite permisible establecido por la Organización Mundial de la Salud (0.5 μg/g), siendo 4.2% para especies no carnívoras y 7.4% para especies carnívoras. De las especies ícticas, 76.9% presentan valores de índice de riesgo (HI) superiores a 1. El Índice de Geoacumulación (Igeo) en sedimentos, presenta grado de contaminación de no-contaminado a contaminación moderada para las diferentes estaciones de muestreo. La concentración de HgT en cabello osciló entre 0.17 – 8.8 µg/g. 47% de la población supera el límite permisible establecido como referencia por USEPA: 1 µg g-1. Las concentraciones de HgT en macrofitas (Eichhornia crassipes) y plantas de cultivos de arroz fueron superiores en estaciones de muestreo que reciben corrientes de agua que transportan cargas contaminantes desde áreas de explotación mineras, tendencia similar presentada para sedimentos y peces. Conclusiones. Las actividades mineras han generado un proceso de contaminación gradual por Hg en la cadena alimenticia y actualmente los niveles en peces, arroz y cabello representan una seria preocupación para la salud humana.es-ES
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dc.languagespa
dc.publisherUniversidad de Córdobaes-ES
dc.relationhttps://revistamvz.unicordoba.edu.co/article/view/1481/1746
dc.relationhttps://revistamvz.unicordoba.edu.co/article/view/1481/epub
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dc.sourceJournal MVZ Cordoba; Vol. 23 No. S (2018): Revista MVZ Córdoba Volumen 23(Supl) Diciembre 2018; 7062-7075en-US
dc.sourceRevista MVZ Córdoba; Vol. 23 Núm. S (2018): Revista MVZ Córdoba Volumen 23(Supl) Diciembre 2018; 7062-7075es-ES
dc.source1909-0544
dc.source0122-0268
dc.subjectMercuryen-US
dc.subjectmining industryen-US
dc.subjectpublic healthen-US
dc.subjectIndustria mineraes-ES
dc.subjectmercurioes-ES
dc.subjectsalud públicaes-ES
dc.titleSpatial distribution and evaluation of environmental pollution by mercury in the Mojana region, Colombiaen-US
dc.titleDistribución espacial y evaluación de la contaminación ambiental por mercurio en la región de la Mojana, Colombiaes-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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