446 results on '"Marrugo-Negrete, José"'
Search Results
152. Removal of mercury from gold mine effluents using Limnocharis flava in constructed wetlands
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Marrugo-Negrete, José, primary, Enamorado-Montes, Germán, additional, Durango-Hernández, José, additional, Pinedo-Hernández, José, additional, and Díez, Sergi, additional
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- 2017
- Full Text
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153. Sinú River raw water treatment by natural coagulants
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Rodiño-Arguello, Johana Paola, Feria-Diaz, Jhon Jairo, Paternina-Uribe, Roberth de Jesús, and Marrugo-Negrete, José Luis
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Moringa oleífera ,Sinú river ,Albizia saman ,Hylocereus cf. trigonus ,Guazuma ulmifolia ,Hylocereus cf ,actividad coagulante ,coagulant activity ,Río Sinú ,trigonus - Abstract
Five natural coagulants extracts in saline were evaluated: stems Hylocereus cf. trigonus (Cactus), exudate gum Albizia saman (Campano), bark Guazuma ulmifolia (Guácimo) and bark and seed of Moringa oleífera (Moringa) in raw water samples taken from the Sinú river with initial turbidity levels between 56 and 300 nephelometric turbidity units (NTU). With Jar tests, the turbidity removal efficiencies as a function of percent activity coagulant dosages applied between 5 mg/L to 200 mg/L was determined. Although the Total Organic Carbon (TOC) is an important parameter of the water quality, it was not included in this study because it has been found that the Sinú river turbidity is from sedimentary origin and its stream has a low organic load. The optimal extract dosage was found to be between 10 mg/L and 40 mg/L obtaining removal efficiencies from 40% (turbidity lower than 100 NTU) to 90% (initial turbidity higher than 150 NTU) for extracts of stems H. cf. trigonus, exudate gum A. saman, bark G. ulmifolia and bark M. oleífera. The M. oleífera seed extract had the greatest turbidity removal efficiency even when using an initial turbidity higher than 150 NTU, achieving a coagulant activity up to 98%. Se evaluaron cinco extractos coagulantes naturales en solución salina de tallos de Hylocereus cf. trigonus (Cactus), exudado gomoso de Albizia saman (Campano), corteza de Guazuma ulmifolia (Guácimo) y corteza y semilla de Moringa oleífera (Moringa), en muestras de agua cruda tomadas del río Sinú, con niveles de turbidez inicial entre 56 y 300 unidades nefelométricas de turbidez (UNT). Con ensayos de jarras, se determinó las eficiencias de remoción de turbidez, como una función del porcentaje de actividad coagulante, para dosis aplicadas entre 5 mg/L a 200 mg/L. Aunque el Carbono Orgánico Total (COT) es un parámetro importante en la calidad del agua, no se incluyó en este estudio debido a que se ha hallado que la turbidez del rio Sinú es de origen sedimentario y su corriente tiene una baja carga orgánica. Las eficiencias de remoción variaron de 40% (con turbidez menores a 100 UNT) hasta 90% (con turbidez inicial mayor a 150 UNT), para dosis óptimas de 10 mg/L a 40 mg/L de extractos de tallos de H. cf. trigonus, exudado gomoso de A. saman, y cortezas de G. ulmifolia y de M. oleífera. El extracto de mayor eficiencia fue el obtenido de la semilla de M. oleífera, siendo más efectivo con turbidez mayor a 150 UNT, logrando una actividad coagulante hasta del 98%.
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- 2015
154. Total mercury concentrations in fish from Urrá reservoir (Sinú river, Colombia). Six years of monitoring
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Marrugo-Negrete, José, Navarro-Frómeta, Amado, and Ruiz-Guzmán, Javier
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Bioacumulación ,cadena alimenticia ,food chain ,food habits ,Bioaccumulation ,hábitos alimenticios - Abstract
Objective. The aim of this study was to monitor the total mercury (T-Hg) concentrations in fish from the Urrá reservoir, after impoundment. Materials and methods. Five fish species at different trophic levels were sampled from 2004 to 2009 and analyzed by cold-vapor atomic absorption spectroscopy for T-Hg concentrations in muscle tissue. Water quality parameters were evaluated. Results. The highest (1.39±0.69 µg/g ww) and lowest (0.15±0.02 µg/g ww) T-Hg concentrations were detected in Hoplias malabaricus (piscivorous) and Cyphocharax magdalenae (iliophagous/detritivorous) respectively, whereas Leporinus muyscorum (omnivorous) had an intermediate level (0.40±0.11 µg/g ww). The organic matter content in the water increased with time and depth, whereas dissolved oxygen and pH decreased. A covariance analysis (with fish length as a covariate) shows a steady increase of T-Hg levels in all the studied species after impoundment. Conclusions. The T-Hg concentrations in the evaluated fish species, increased after impoundment. The water quality variables showed conditions favoring Hg methylation and its biomagnification, this last was evident in the fish food chain of the reservoir. Objetivo. El objetivo de este estudio fue monitorear las concentraciones de mercurio total (Hg-T) en peces del embalse Urrá después del represamiento. Materiales y métodos. Cinco especies de peces de diferentes niveles tróficos fueron muestreadas de 2004 a 2009 y analizadas por espectroscopia de absorción atómica para las concentraciones de Hg-T en tejido muscular. Se evaluaron parámetros de calidad de agua. Resultados. Las mayores (1.39±0.69 µg/g ph) y menores (0.15±0.02 µg/g ph) concentraciones de Hg-T fueron detectadas en Hoplias malabaricus (piscívoro) y Cyphocharax magdalenae (iliófago/detritívoro) respectivamente, mientras que Leporinus muyscurum (omnívoro) tuvo un nivel intermedio (0.40±0.11 µg/g ph). El contenido de materia orgánica en el agua se incrementó con el tiempo y la profundidad, mientras que el oxígeno disuelto y el pH disminuyeron. Un análisis de covarianza (con la longitud del pez como covariante) mostró un incremento sostenido de los niveles de Hg-T en todas las especies evaluadas después del represamiento. Conclusiones. Las concentraciones de Hg-T en las especies de peces evaluadas, incrementaron después del represamiento. Las variables de calidad de agua mostraron condiciones favorables para la metilación del Hg y su biomagnificación, estos último fue evidente en la cadena alimenticia de los peces del embalse.
- Published
- 2015
155. Exposición a COVs en fábricas de muebles de dos poblaciones del norte de Colombia
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Vargas-Ramos, Yadiris E and Marrugo-Negrete, José L
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signs and symptoms ,solvents ,trabajadores ,workers ,solventes ,signos y síntomas ,Occupational exposure ,Exposición ocupacional - Abstract
Objetivos Evaluar la exposición a compuestos orgánicos volátiles (COVs) en trabajadores de fábricas artesanales de muebles de dos poblaciones de Sucre (Sincelejo y Sampués), Norte de Colombia. Determinar posibles signos y/o síntomas relacionados con la exposición a estos contaminantes. Métodos Estudio transversal analítico con aplicación de una encuesta. La población objetivo estuvo conformada por 66 individuos, 41 expuestos y 25 controles. Se tomaron muestras personales para las concentraciones de benceno, tolueno, etilbenceno y xilenos (en ambos grupos) y se contrastó con posibles efectos en la salud atribuidos a estos contaminantes. Resultados Las concentraciones de benceno, tolueno y m/p-xileno fueron mayores en el grupo expuesto (9,5 mg/m³, 8,1 mg/m³ y 12,1 mg/m³) en comparación con el grupo control(0,2 mg/m³, 0,3 mg/m³ y 0,03 mg/m³).Dolor muscular 82,9 % (RP=3,8; IC95%:1,2-11,8) y somnolencia 65,9 % (RP=4,9; IC95%:1,7-14,7)estuvieron asociados a mayor exposición (p< 0,05). Factores como el uso de mezclas solventes (thinner) en el trabajo y el tráfico vehicularpueden contribuir a estos resultados. Conclusiones La contribución de diversas fuentes aumenta la exposición personal a los COVs, de los trabajadores de las fábricas artesanales de muebles en el Norte de Colombia. Adicionalmente, el uso excesivo de estos compuestos puede estar generando efectos adversos en la salud de los trabajadores. Objectives Assess the exposure to volatile organic compounds (VOCs)in furniture handicraft factories workers in two populations of Sucre (Sincelejo and Sampués), North of Colombia.Identify possible signs and/or symptoms related to exposure to these contaminants. MethodsThis was an analytical cross sectional study (2011), using a questionnaire. Study population consisted of 66 individuals, 41 exposed and 25 controls. Personal samples were collected for concentration quantifying of benzene, toluene, ethylbenzene and xylenes (both groups) and contrasting them with health effects possible attributed to these contaminants. Results The concentrations of benzene, toluene and m/p-xylene were higher in the exposed group (9.5 mg/m³, 8.1 mg/m³ and 12.1 mg/m³)compared withthe control group (0.2 mg/m³, 0.3 mg/m³ and0.03 mg/m³). Muscular pain 82.9 % (PR=3.8; CI95%:1.2-11.8) and somnolence 65.9 % (PR=4.9; CI95%:1.7-14.7)were associated with a higher exposure.Factor such as mixtures of solvents (thinner) in the work and vehicles' traffic can contribute to these results. Conclusions Several sources contribute to increases personal exposure ofVOCs in furniture handicraft factories workers North of Colombia. Additionally, excessive use of these compoundsmay be generating adverse effects on the health of workers.
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- 2014
156. Evaluación de la capacidad acumuladora de mercurio del ají (Capsicum annuum)
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Pérez-Vargas, Híver M, Vidal-Durango, Jhon V, and Marrugo-Negrete, José L
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foods ,alimentos ,Mercurio ,oro ,spectrophotometry ,minería ,Mercury ,mining ,gold ,espectrofotometría - Abstract
Objetivo Evaluar la capacidad acumuladora de mercurio por parte la planta de ají (Capsicum annuum), en suelos contaminados procedentes del corregimiento Mina Santa Cruz, Sur de Bolívar, Colombia, con el propósito de establecer el riesgo para la salud de la población consumidora. Materiales y Métodos Se tomaron muestras de tejidos (raíces, tallos y hojas) de plantas de C. annuum sembradas en dos suelos contaminados con mercurio y un suelo control, durante sus primeros cinco meses de crecimiento para determinar mercurio total mediante la técnica de espectrofotometría de absorción atómica por vapor frio. Se determinó mercurio total en muestras de frutos de ají consumido en Mina Santa Cruz. Resultados Las concentraciones medias de mercurio total en raíces fueron mayores en comparación con tallos y hojas. Los niveles de mercurio en suelos y el tiempo influyeron en la acumulación en tejidos. Las concentraciones de mercurio en frutos de C. annuum fueron bajas en relación a la ingesta tolerable semanal dispuesta por la OMS. Conclusión Los porcentajes de translocación de mercurio a las partes aéreas de la planta fueron bajos tanto en el suelo control como en los suelos contaminados. A pesar de los bajos niveles de mercurio en este alimento se debe disminuir al máximo el consumo de alimentos contaminados con dicho metal. Objective To assess the mercury accumulating capacity in contaminated soils from the community of Mina Santa Cruz, in the south of the department of Bolívar, Colombia, of the pepper plant (Capsicum annuum), in order to establish the risk to the health of the consuming population. Materials and Methods Samples were taken from tissues (roots, stems, and leaves) of pepper plants grown in two soils contaminated with mercury and a control soil during the first five months of growth to determine total mercury through cold vapor atomic absorption spectrometry. Total mercury was determined in the samples of pepper plant fruits consumed in Mina Santa Cruz. Results The mean concentrations of total mercury in the roots were higher than in stems and leaves. Accumulation in tissues was influenced by mercury levels in soil and the growth time of the plants. Mercury concentrations in fruits of pepper plant were lower than tolerable weekly intake provided by WHO. Conclusion Percent of translocation of mercury to aerial parts of the plant were low in both control and contaminated soils. Despite low levels of mercury in this food, it is necessary to minimize the consumption of food contaminated with this metal.
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- 2014
157. Contaminación por metales pesados en la bahía Cispatá en Córdoba-Colombia y su bioacumulación en macromicetos.
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de Jesús Cadavid-Velásquez, Edith, del Socorro Pérez-Vásquez, Nabi, and Marrugo-Negrete, José
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HEAVY metals ,SEDIMENT sampling ,ORGANIC compounds ,BIOACCUMULATION ,MINERALIZATION ,FUNGI - Abstract
Copyright of Gestión y Ambiente is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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.)
- Published
- 2019
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158. Spatial distribution and evaluation of environmental pollution by mercury in the Mojana region, Colombia.
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Marrugo-Negrete, José, Pinedo-Hernández, José, Paternina-Uribe, Roberth, Quiroz-Aguas, Liliana, and Pacheco-Florez, Sergio
- Abstract
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. [ABSTRACT FROM AUTHOR]
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- 2018
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159. Remoción de cipermetrina presente en el baño de ganado utilizando humedales construidos
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Marrugo Negrete, José Luis, Ortega Ruíz, José Gregorio, Navarro, Amado, Enamorado Montes, Germán Holland, Pinedo Hernández, José Joaquín, Durango Hernández, José David, Estrada Martínez, Arnulfo José, Urango, Iván D., Marrugo Negrete, José Luis, Ortega Ruíz, José Gregorio, Navarro, Amado, Enamorado Montes, Germán Holland, Pinedo Hernández, José Joaquín, Durango Hernández, José David, Estrada Martínez, Arnulfo José, and Urango, Iván D.
- Abstract
Ectoparasite control in the livestock sector involves the use of chemicals to prevent production losses. In small farms that produce milk in the Córdoba department, the use of the pumping system for the cattle bath is common between farmers. In this work, cypermethrin degradation efficiency was evaluated in three lab-scale subsurface flow constructed wetland planted with Limnocharis flava, Cyperus papyrus and Alpinia purpurata sp., and one unplanted system, all of the beds were gravel based; then, total suspended solids and total phosphorus retention, and elimination of chemical oxygen demand were measured as water quality parameters. The wastewater was pretreated in a descending-ascending slow sand filter, and then was conducted to a wetland continuous flow fed at 7 ml/min. Limnocharis flava bed was higher for the degradation of organic compounds, with 97.9 ± 2.5 % and 69.1 ± 3.7 % for cypermethrin and chemical oxygen demand respectively, with statistically significant differences (p < 0,05) respect to unplanted bed. The higher SST removal were found in the Cyperus papyrus wetland, with 62,0 %, however, no differences were observed with the other evaluated planted systems, as opposed these were significantly higher than unplanted wetlands.
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- 2016
160. Exposición a COVs en fábricas de muebles de dos poblaciones del norte de Colombia
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Vargas Ramos, Yadiris Elena and Marrugo Negrete, José Luis
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36 Problemas y servicios sociales, asociaciones / Social problems and social services ,trabajadores ,61 Ciencias médicas ,Medicina / Medicine and health ,solventes ,signos y síntomas ,Exposición ocupacional - Abstract
Objetivos Evaluar la exposición a compuestos orgánicos volátiles (COVs) en trabajadores de fábricas artesanales de mueblesde dos poblaciones de Sucre (Sincelejo y Sampués), Norte de Colombia. Determinar posibles signos y/o síntomas relacionados con la exposición a estos contaminantes.Métodos Estudio transversal analíticocon aplicación de una encuesta. La población objetivo estuvo conformada por 66 individuos, 41 expuestos y 25 controles. Se tomaron muestras personales para las concentraciones de benceno, tolueno, etilbenceno y xilenos (en ambos grupos) y se contrastó con posibles efectos en la salud atribuidos a estos contaminantes.Resultados Las concentraciones de benceno, tolueno y m/p-xileno fueron mayores en el grupo expuesto (9,5 mg/m3, 8,1 mg/m3 y 12,1 mg/m3) en comparación con el grupo control(0,2 mg/m3, 0,3 mg/m3 y 0,03 mg/m3).Dolor muscular 82,9 % (RP=3,8; IC95%:1,2-11,8) y somnolencia 65,9 % (RP=4,9; IC95%:1,7-14,7)estuvieron asociados a mayor exposición (p 0,05). Factores como el uso de mezclas solventes (thinner) en el trabajo y el tráfico vehicularpueden contribuir a estos resultados.Conclusiones La contribución de diversas fuentes aumenta la exposición personal a los COVs, de los trabajadores de las fábricas artesanales de muebles en el Norte de Colombia. Adicionalmente, el uso excesivo de estos compuestos puede estar generando efectos adversos en la salud de los trabajadores.
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- 2014
161. Mercury uptake and effects on growth in Jatropha curcas
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Marrugo-Negrete, José, primary, Durango-Hernández, José, additional, Pinedo-Hernández, José, additional, Enamorado-Montes, Germán, additional, and Díez, Sergi, additional
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- 2016
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162. Biosorción simultanea de plomo y cadmio en solución acuosa por biomasa de hongos penicillium sp.
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Sánchez, Juan, primary, Marrugo Negrete, José Luis, primary, and Urango, Iván, primary
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- 2016
- Full Text
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163. Remoción de cipermetrina presente en el baño de ganado utilizando humedales construidos
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Marrugo Negrete, José Luis, primary, Ortega-Ruíz, José Gregorio, additional, Navarro Frómeta, Amado Enrique, additional, Enamorado Montes, Germán Holland, additional, Urango Cárdenas, Iván David, additional, Pinedo Hernández, José Joaquín, additional, Durango Hernández, José David, additional, and Estrada Martínez, Arnulfo José, additional
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- 2016
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164. Screening of native plant species for phytoremediation potential at a Hg-contaminated mining site
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Marrugo-Negrete, José, primary, Marrugo-Madrid, Siday, additional, Pinedo-Hernández, José, additional, Durango-Hernández, José, additional, and Díez, Sergi, additional
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- 2016
- Full Text
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165. Total mercury concentrations in fish from Urrá reservoir (Sinú river, Colombia): Six years of monitoring
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Marrugo Negrete, José Luis, Navarro, Amado, Ruiz Guzmán, Javier, Marrugo Negrete, José Luis, Navarro, Amado, and Ruiz Guzmán, Javier
- Abstract
Objective. The aim of this study was to monitor the total mercury (T-Hg) concentrations in fish from the Urrá reservoir, after impoundment. Materials and methods. Five fish species at different trophic levels were sampled from 2004 to 2009 and analyzed by cold-vapor atomic absorption spectroscopy for T-Hg concentrations in muscle tissue. Water quality parameters were evaluated. Results. The highest (1.39±0.69 µg/g ww) and lowest (0.15±0.02 µg/g ww) T-Hg concentrations were detected in Hoplias malabaricus (piscivorous) and Cyphocharax magdalenae (iliophagous/detritivorous) respectively, whereas Leporinus muyscorum (omnivorous) had an intermediate level (0.40±0.11 µg/g ww). The organic matter content in the water increased with time and depth, whereas dissolved oxygen and pH decreased. A covariance analysis (with fish length as a covariate) shows a steady increase of T-Hg levels in all the studied species after impoundment. Conclusions. The T-Hg concentrations in the evaluated fish species, increased after impoundment. The water quality variables showed conditions favoring Hg methylation and its biomagnification, this last was evident in the fish food chain of the reservoir., Objetivo. El objetivo de este estudio fue monitorear las concentraciones de mercurio total (Hg-T) en peces del embalse Urrá después del represamiento. Materiales y métodos. Cinco especies de peces de diferentes niveles tróficos fueron muestreadas de 2004 a 2009 y analizadas por espectroscopia de absorción atómica para las concentraciones de Hg-T en tejido muscular. Se evaluaron parámetros de calidad de agua. Resultados. Las mayores (1.39±0.69 µg/g ph) y menores (0.15±0.02 µg/g ph) concentraciones de Hg-T fueron detectadas en Hoplias malabaricus (piscívoro) y Cyphocharax magdalenae (iliófago/detritívoro) respectivamente, mientras que Leporinus muyscurum (omnívoro) tuvo un nivel intermedio (0.40±0.11 µg/g ph). El contenido de materia orgánica en el agua se incrementó con el tiempo y la profundidad, mientras que el oxígeno disuelto y el pH disminuyeron. Un análisis de covarianza (con la longitud del pez como covariante) mostró un incremento sostenido de los niveles de Hg-T en todas las especies evaluadas después del represamiento. Conclusiones. Las concentraciones de Hg-T en las especies de peces evaluadas, incrementaron después del represamiento. Las variables de calidad de agua mostraron condiciones favorables para la metilación del Hg y su biomagnificación, estos último fue evidente en la cadena alimenticia de los peces del embalse.
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- 2015
166. Exposición a mercurio en habitantes del municipio de San Marcos (Departamento de Sucre) debida a la ingesta de arroz (Oryza sativa) contaminado
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Argumedo-García, Marcela P., Consuegra-Solórzano, Adolfo, Vidal-Durango, John V., and Marrugo-Negrete, José L.
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atomic ,mercury ,salud pública ,Contaminación ,public health ,spectrophotometry ,minería ,Oryza sativa ,mining ,mercurio ,Pollution ,espectrofotometría por absorción atómica - Abstract
Objetivo Determinar la magnitud de la exposición a mercurio en los habitantes del municipio de San Marcos debida a la ingesta de arroz (Oryza sativa) contaminado. Métodos Se seleccionaron 20 personas representativas de la población y se tomaron muestras del alimento (arroz crudo) y muestras de cabello para determinar mercurio total y metilmercurio mediante la técnica de espectrofotometría de absorción atómica por vapor frio. Para realizar comparaciones entre las distintas muestras se realizaron t-test, tomando un grado de significancia P
- Published
- 2013
167. Electrokinetic remediation of mercury- contaminated soil, from the mine El Alacran-San Jorge river basin, Cordoba - Colombia
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Marrugo Negrete, José Luis and López Barboza, Erick
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mercury ,suelo ,Electrokinetic ,Electrocinética ,agentes complejantes ,mercurio ,complexing agents ,soil - Abstract
The aim of this work was to evaluate the electrokinetic technique for remediation of mercury contaminated soils from the mine El Alacrán, located in the San Jorge river basin from Colombian's Córdoba department. KI and NaCl solutions were used as complexing agents for removing mercury at two concentrations 0.01 M and 0.05 M, by applying voltages of 30 and 40 V respectively. The best results were obtained when KI was used as complexing agent, reaching percentages of recovery up to 98.7%. The treatments where NaCl was used as complexing agent not achieved significant recoveries (< 1%), except when was used a concentration of 0.05 M NaCl with an applied voltage of 40 V reaching a recovery of 38%. In all experiments, the mercury moved towards the anode due to complexation of anionic nature complex and was observed that increasing concentrations and voltages a more efficient and speedy removal of mercury in the soil was achieved. The results showed that the iodide has properties that make it a promising electrolyte solution for the removal of mercury in the soil. El objetivo de este trabajo fue evaluar la técnica electrocinética para la remediación de suelos contaminados con mercurio de la mina El Alacrán, ubicada en la cuenca del río San Jorge en el departamento de Córdoba, Colombia. Soluciones de KI y NaCl fueron usadas como agentes complejantes para la remoción del mercurio en dos concentraciones 0.01 y 0.05 M, aplicando voltajes de 30 y 40 V respectivamente. Los mejores resultados fueron obtenidos cuando el KI se usó como agente complejante, alcanzando porcentajes de recuperación hasta de 98.7%. los tratamientos donde el NaCl se usó como agente complejante no alcanzaron recuperaciones significativas (< 1%), excepto cuando se usó una concentración de 0.05 M de NaCl con un voltaje de 40 V alcanzando una recuperación de 38%. En todos los experimentos, el mercurio se movió hacia el ánodo, debido a la formación de complejos de naturaleza aniónica y se observó que incrementando la concentración y el voltaje, una mayor eficiencia y velocidad de remoción de mercurio del suelo fue alcanzada. Los resultados muestran que el ioduro tiene propiedades que lo hacen una solución electrolítica prometedora para la remoción del mercurio en suelos contaminados.
- Published
- 2013
168. Perfil de la expresión génica en células sanguíneas aisladas de carpinteros expuestos a solventes orgánicos en Sucre (Colombia)
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Vergara Rivera, Carlos, Olivero Verbel, Jesús, Guerrero Castilla, Angélica, Arroyo Salgado, Bárbara, and Marrugo Negrete, José Luis
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células sanguíneas ,exposición ocupacional ,expresión génica ,estrés oxidativo ,gene expression ,oxidative stress ,Volatile organic compounds ,occupational exposure ,blood cells ,Compuestos orgánicos volátiles - Abstract
Resumen Objetivo: El objetivo de este estudio fue evaluar la expresión de genes asociados con estrés oxidativo, inflamación y daño al ácido desoxirribonucleico (ADN) en trabajadores de carpinterías en Sucre (Colombia). Materiales y métodos: Aleatoriamente fueron seleccionados 41 individuos de sexo masculino: 28 expuestos y 13 controles, con edades entre 32.3±7.9 y 33.2±8.4 años, respectivamente. Se colectaron muestras de sangre periférica y se realizaron análisis hematológicos y de marcadores de daño hepático. En 24 individuos expuestos y 10 controles se realizó análisis de expresión génica para marcadores de estrés oxidativo, inflamación y daño al ADN usando reacción en cadena de la polimerasa en tiempo real. Resultados: Los parámetros hematológicos y de daño hepático estuvieron dentro de los valores de referencia. La expresión génica de la P53 y BCL-2, genes asociados con el daño al ADN, fue significativamente mayor para el grupo expuesto en comparación con el grupo control. Conclusión: En ausencia de cambios en marcadores hematológicos o de daño hepático, personas expuestas a solventes en Sucre tienen niveles de expresión elevados para los genes P53 y BCL-2. Estos genes podrían ser candidatos útiles como biomarcadores moleculares relacionados con la exposición a solventes. Abstract Objective: The aim of this study was to evaluate the expression of genes related to oxidative stress, inflammation and deoxyribonucleic acid (DNA) damage in carpentry workers from Sucre, Colombia. Materials and methods: 41 male individuals were randomly selected, 28 exposed and 13 controls, with ages 32.3 ± 7.9 and 33.2 ± 8.4 years old, respectively. Peripheral blood samples were collected and used for hematological and liver damage markers analysis. Gene expression analysis for oxidative stress, inflammation and DNA markers was performed using Real-Time Polymerase Reaction on 24 exposed and 10 controls. Results: Hematological parameters and liver damage markers were found within the reference values. Gene expression of P53 and BCL-2, genes related to DNA damage, was significantly greater for the exposed group when compared with the control group. Conclusion: In the absence of hematological or hepatic damage markers, individuals exposed to solvents in Sucre have increased gene expression for P53 and BCL2. These genes may be useful candidates as molecular biomarkers related to solvent exposure.
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- 2013
169. Exposición a mercurio en habitantes del municipio de san marcos (departamento de sucre) debida a la ingesta de arroz (oryza sativa) contaminado
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Argumedo García, Marcela Patricia, Consuegra-Solórzano, Adolfo, Vidal-Durango, John V., and Marrugo-Negrete, José L.
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Contaminación ambiental ,salud pública ,BIREME) ,Biología ,Contaminación ,DeCS [espectrofotometría por absorción atómica (fuente] ,Conservación ,minería ,Oryza sativa ,mercurio - Abstract
Objetivo Determinar la magnitud de la exposición a mercurio en los habitantes del municipio de San Marcos debida a la ingesta de arroz (Oryza sativa) contaminado.Métodos Se seleccionaron 20 personas representativas de la población y se tomaron muestras del alimento (arroz crudo) y muestras de cabello para determinar mercurio total y metilmercurio mediante la técnica de espectrofotometría de absorción atómica por vapor frio. Para realizar comparaciones entre las distintas muestras se realizaron t-test, tomando un grado de significancia P and lt;0.05 y para determinar la relación entre los hábitos de consumo y la concentración de mercurio en humanos se realizó un análisis de correlación.Resultados El arroz comercializado de forma suelta (arroz blanco de San Marcos) fue el único que mostró una mínima concentración de mercurio total de 0,021 μg/g, mientras que los que se comercializan de forma empacada no arrojaron un valor cuantificable. Solo el 5 % de la muestra poblacional excedió la dosis de referencia e Ingestión de MeHg (RfD) establecida por la EPA,de 0,1 μg/Kg de peso corporal/día.Conclusiones La exposición a HgT de los habitantes del municipio de San Marcos por consumo de arroz es baja y no implica grandes riesgos para su salud. No obstante, el consumo frecuente de otros alimentos contaminados podría representar una amenaza potencial para la salud de los consumidores, lo cual hace necesario su permanente monitoreo ambiental.
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- 2013
170. Human health impacts of exposure to metals through extreme consumption of fish from the Colombian Caribbean Sea.
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Fuentes-Gandara, Fabio, Pinedo-Hernández, José, Marrugo-Negrete, José, and Díez, Sergi
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METALS ,HEALTH risk assessment ,FISHING villages ,LEAD ,METHYLMERCURY - Abstract
The health risks of metal exposure due to the high consumption of fish were assessed for a riverine population living on the Caribbean coast of Colombia. The concentrations of metals (Cd, Cr, Cu, Hg, Ni, Pb and Zn) in the edible tissues of fish were determined and used for risk assessment. The daily fish consumption of residents (
n = 95) was as high as 283, 366 and 469 g/day in children (CH), women of childbearing age (WCHA) and the remaining population groups (RP), respectively. The estimation of the potential risk (HQ) indicated that there was no health risk from most of the metals, because they did not exceed their related reference doses, with values of HQ < 1. Although the concentrations of Pb and Hg were not particularly high in fish (<0.2 µg/g), their possible health effects for vulnerable groups are of great concern due to the extremely high fish intake. The Pb intake for all groups was higher than the lower confidence limit of the benchmark dose for nephrotoxicity and neurodevelopmental effects in children. The weekly intake of methylmercury was also elevated, with values approximately 3, 2 and 1.5 times the provisional tolerable weekly intake for CH, WCHA and RP, respectively. Moreover, higher Hg levels were found in top predators, whereas maximum levels for other metals were found in bottom-feeding fish. This study highlights that an accurate data of daily intake, a continuous monitoring of metals in fish and their related fish consumption advisories to protect subsistence fishing communities are recommended in a local and worldwide context. [ABSTRACT FROM AUTHOR]- Published
- 2018
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171. Biomagnification of Mercury in Fish from Two Gold Mining-Impacted Tropical Marshes in Northern Colombia.
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Marrugo-Negrete, José Luis, Ruiz-Guzmán, Javier Alonso, and Ruiz-Fernández, Ana Carolina
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BIOMAGNIFICATION ,MERCURY content of fish ,MERCURY in water ,GOLD mining ,MARSHES - Abstract
Total mercury concentrations (T-Hg) and stable isotope ratios (δN and δC) were analyzed in the muscle of fish, collected at two marshes impacted by gold mining in Northern Colombia, to evaluate the seasonal and spatial behavior of these variables and mercury biomagnification based on their relationship with δN ratios in the fish. There was not significant ( p > 0.05) seasonal differences (dry and rainy season) in δN and δC values in none marsh, suggesting that these fish species keep a similar feed pattern within each marsh along the year. However, there were significant differences ( p < 0.05) between marshes in δN, δC, and T-Hg, as well as significant seasonal differences ( p < 0.05) in T-Hg values for some species, suggesting the possible influence of factors, such as differences in length of food chains between marshes and different degree of anthropogenic impact in relation to human settlements, farmland, livestock (higher in Ayapel marsh), and gold mining activity (higher in La Raya marsh). Correlations analysis showed significant ( p < 0.05) relationships between T-Hg concentrations and δN values, as well as trophic level, evidencing a T-Hg biomagnification process in the fish food chain from both marshes and consequently a potential health risk for human riverside inhabitants who eat these fish. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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172. Total mercury concentrations in fish from Urrá reservoir (Sinú river, Colombia). Six years of monitoring
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Marrugo-Negrete, José, primary, Navarro-Frómeta, Amado, additional, and Ruiz-Guzmán, Javier, additional
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- 2015
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173. Geochemistry of mercury in tropical swamps impacted by gold mining
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Marrugo-Negrete, José, primary, Pinedo-Hernández, José, additional, and Díez, Sergi, additional
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- 2015
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174. Exposición a COVs en fábricas de muebles de dos poblaciones del norte de Colombia
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Vargas Ramos, Yadiris Elena, primary and Marrugo Negrete, José Luis, additional
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- 2015
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175. Phytoremediation of mercury-contaminated soils by Jatropha curcas
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Marrugo-Negrete, José, primary, Durango-Hernández, José, additional, Pinedo-Hernández, José, additional, Olivero-Verbel, Jesús, additional, and Díez, Sergi, additional
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- 2015
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176. Speciation and bioavailability of mercury in sediments impacted by gold mining in Colombia
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Pinedo-Hernández, José, primary, Marrugo-Negrete, José, additional, and Díez, Sergi, additional
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- 2015
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177. Biosorción simultanea de plomo y cadmio en solución acuosa por biomasa de hongos penicillium sp.
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Sanchez, Juan, Marrugo Negrete, José Luis, Urango, Iván D., Sanchez, Juan, Marrugo Negrete, José Luis, and Urango, Iván D.
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La descarga de metales pesados en el ambiente genera impactos significativos en la salud humana y ciclos biológicos. Algunos microorganismos son conocidos por su alta capacidad de adsorción de metales, entre estos los hongos. El objetivo del presente trabajo fue evaluar la capacidad de remoción de Pb (II) y Cd (II) en soluciones acuosas con hongos Penicillium sp., aislando la cepa fúngica del suelo de la mina el Alacrán (CórdobaColombia) y determinando la influencia en las variables pH, concentración inicial de metales y temperatura, analizando las isotermas de Freundlich y Langmüir, Verificando los grupos funcionales que intervienen en la adsorción por análisis infrarrojo (IR), con el fin potencializar su uso en el saneamiento de aguas residuales. Los análisis se realizaron empleando los equipos Thermo scientific de absorción atómica modelo ICE 3000 serie y espectrofotómetro FT-IR Nicolet Is5 realizando control de calidad con material de referencia de Pb y Cd SRM-1643e. A 51,5 mg L^-1 de Pb y Cd se pudo encontrar los mayores porcentajes de remoción para 0,5 g de biomasa. Las máximas adsorciones se dieron a pH ácido (4-5) y 60 °C, logrando remociones del 92,4% para Pb y 80% para Cd. Las isotermas se ajustan mejor al modelo Langmuir. El análisis IR muestra grupos -OH, -NH, C-N, C-H, N-H, C=O, amida I y amidas II y polisacáridos, atribuyendo esto la atracción en los metales y la biomasa fúngica.
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- 2014
178. Metales en sedimento del rio Ranchería, La Guajira.
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Doria Argumedo, Carlos, Gómez Sierra, Jaiker, and Marrugo Negrete, José
- Abstract
Copyright of Bistua: Revista de la Facultad de Ciencias Básicas is the property of Facultad de Ciencias Basicas de la Universidad de Pamplona and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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.)
- Published
- 2017
179. Erratum to: Atmospheric deposition of heavy metals in the mining area of the San Jorge river basin, Colombia
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Marrugo-Negrete, José Luis, primary, Urango-Cardenas, Ivan D., additional, Núñez, Saudith M. Burgos, additional, and Díez, Sergi, additional
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- 2014
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180. Human Exposure to Mercury Through Fish Consumption: Risk Assessment of Riverside Inhabitants of the Urrá Reservoir, Colombia
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Ruiz-Guzmán, Javier Alonso, primary, Marrugo-Negrete, José Luis, additional, and Díez, Sergi, additional
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- 2014
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181. Heavy metals in wild house mice from coal-mining areas of Colombia and expression of genes related to oxidative stress, DNA damage and exposure to metals
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Guerrero-Castilla, Angélica, primary, Olivero-Verbel, Jesús, additional, and Marrugo-Negrete, José, additional
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- 2014
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182. Eficiencia de un humedal de flujo subsuperficial para el tratamiento de aguas residuales del empacado de hortalizas.
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Navarro, Amado, García, Yasmín, Vázquez, Antonio, Marrugo Negrete, José Luis, Navarro, Amado, García, Yasmín, Vázquez, Antonio, and Marrugo Negrete, José Luis
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In order to treat the wastewater from vegetable peeling of a packing plant located in Atlixco, Mexico, it was used a system of horizontal subsurface flow constructed wetlands at mesocosms level, comprising a settler, a cell with river gravel and planted with Phragmites australis, followed by two parallel cells with gravel and volcanic rock, planted with Typha latifolia, was used. Operating in semi-batch mode, the hydraulic residence time in each cell was 5 days. The wastewater characteristics and treatment outcomes were highly variable depending on the processed vegetable. The percentage reduction of the Chemical and Biochemical Oxygen Demand Oxygen (COD/BOD) was 77/48 with high organic loads of wastewater (BOD > 2000 mg L-1) and 92/94 with low loads (BOD < 1200 mg L-1). Other analyzed parameters (pH, electrical conductivity, redox potential, NO2 -, NO3 - and NH4 +) showed acceptable values at the system output., Con el objetivo de tratar el agua resultante del pelado de vegetales de una empacadora situada en Atlixco, México, se utilizó un sistema de humedales construidos de flujo subsuperficial horizontal, a nivel de mesocosmos, compuesto por un sedimentador, una celda con grava de río y plantada con Phragmites australis, seguida por dos celdas paralelas, con grava y piedra volcánica, plantadas con Typha latifolia. Operando por semilotes, el tiempo de residencia hidráulica en cada celda fue de 5 días. Las características del agua residual y los resultados del tratamiento fueron altamente variables dependiendo del vegetal procesado. El porcentaje de reducción de la Demanda Química y Bioquímica de Oxígeno (DQO/DBO) fue de 77/48 con altas cargas orgánicas del agua residual (DBO > 2000 mg L-1) y de 92/94 con bajas cargas (DBO < 1200 mg L-1). Otros parámetros analizados (pH, conductividad eléctrica, potencial redox, NO2 -, NO3 - y NH4 +) mostraron valores aceptables a la salida del sistema.
- Published
- 2013
183. Producción y pérdida de nitrato en Brachiaria humidicola y Panicum maximum en el valle del río Sinú
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Espinosa C., Manuel, Marrugo Negrete, José Luis, Hurtado S., María, Reza, Sony, Espinosa C., Manuel, Marrugo Negrete, José Luis, Hurtado S., María, and Reza, Sony
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Nitrogen loss, from the nitrification of nitrogen fertilizer, creates pollution through nitrous oxide emissions and nitrate leaching. The reports on Brachiaria as a biological nitrification inhibitor were evaluated to determine nitrate losses of Brachiaria humidicola CIAT 679 (indicator plant for biological nitrification inhibition) and Panicum maximum cv. tanzania (non-inhibiting plant). The incubated soil technique was used for the production of nitrate and for losses of nitrate, ion exchange PRSTM Probes resins were used. The nitrogen treatments were 0, 150 and 300 kg ha-1 per year, the resins were installed at three depths in the soil, laboratory analysis was performed using ultraviolet-visible spectroscopy with a wavelength of 410 nm for nitrate. B. humidicola reduced outputs of nitrate in the soil and the nitrogen doses did not generate variations in production, which showed an effect on the inhibition of nitrification. Nitrate losses were reduced after 18 months in B. humidicola, and P. maximum can avoid nitrate losses with its ability to take nitrogen from the soil in an ammonia form, but does not reduce nitrate production, and does not inhibit nitrification. In cattle pasture soils, B. humidicola can reduce nitrate production and loss. P. maximum with its ability and good response to nitrogenated fertilization could have reduced losses, but failed to reduce nitrate production., Las pérdidas de nitrógeno a partir de la nitrificación de las fertilizaciones nitrogenadas generan contaminación por las emisiones de óxido nitroso y lixiviación de nitrato. Los reportes de Brachiaria como inhibidor biológico de la nitrificación fueron evaluados al determinar las pérdidas de nitrato de Brachiaria humidicola CIAT 679 (planta indicadora de inhibición biológica de nitrificación) y Panicum maximum cv. tanzania (planta no inhibidora). Para la producción de nitrato se empleó la técnica de suelo incubado y para las pérdidas de nitrato se emplearon resinas de intercambio iónico PRSTM Probes. Los tratamientos de fertilización nitrogenada fueron de 0, 150 y 300 kg ha-1 por año; las resinas se instalaron a tres profundidades en el suelo, los análisis de laboratorio se realizaron mediante espectroscopía de ultravioleta visible con longitud de onda de 410 nm para nitrato. B. humidicola redujo las producciones de nitrato en el suelo y las dosis de nitrógeno no generaron variaciones en las producciones, lo que evidenció un efecto en la inhibición de la nitrificación. Las pérdidas de nitrato, se redujeron después de 18 meses en la B. humidicola; y para P. maximum puede evitar las pérdidas de nitrato por su habilidad de tomar el nitrógeno en forma amoniacal del suelo, pero no reduce la producción de nitrato, ya que no inhibe la nitrificación. Los suelos dedicados a la producción ganadera con la pastura B. humidicola pueden reducir las producciones y las pérdidas de nitrato. P. maximum, por su habilidad y buena respuesta a la fertilización nitrogenada pudo reducir las pérdidas, pero no logró reducir las producciones de nitrato.
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- 2012
184. Detección de metales pesados en bovinos, en los valles de los rios Sinú y San Jorge, departamento de Córdoba, Colombia
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Madero G., Aura, Marrugo Negrete, José Luis, Madero G., Aura, and Marrugo Negrete, José Luis
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Objective. To evaluate the presence of heavy metals: lead (Pb), copper (Cu), cadmium (Cd), and mercury (Hg) in the liver and right pectoral muscle veal, from farms located in the Sinu and San Jorge area. Materials and methods. Adults, crossbred zebu, male cattle, approximated 2 to 7 years of age were sampled. SAMPLES were taken during a period of six months from animals slaughtered for human consumption. The metals were assessed by atomic absorption spectroscopy, using lights and tasted a hollow air-acetylene burner to determine Cu; cold vapor for the detection of Hg and polarography to detect Cd and Pb. Results. The ranges of Hg, Cu, Pb and Cd are below the benchmarks of the European Commission and the Norma Oficial Mexicana. Levels were not permissible for human consumption of Cu in 4% of the samples. Conclusions. The meat industry in the region has great potential to access international markets, since 96% of cattle had levels of metals below the permissible limits of Mexico and Europe. While Hg levels are in the permissible limits, risk assessment based on the hazard index suggested that the daily consumption of 100 grams of meat products with levels of 0.08 ppm, might increase the risk of poisoning for a person of 70 kg weight., Objetivo. Evaluar la presencia de metales pesados: plomo(Pb), cobre (Cu), cadmio (Cd) y mercurio (Hg) en hígado y músculo pectoral derecho de bovino, procedentes de fincas de la zona del Sinú y San Jorge. Materiales y métodos. Se muestrearon bovinos machos, adultos, de raza cebú mestizo, entre 2 a 7 años los cuales fueron sacrificados para consumo humano durante seis meses. Las muestras se analizaron mediante: espectroscopia de absorción atómica, empleando lámparas de cátodo hueco y un quemador de aire acetileno para determinar Cu; vapor frío para la detección de Hg y polarografía para la detección de Cd y Pb. Resultados. Se observó que Los rangos de Hg, Cu, Cd y Pb estaban por debajo de los parámetros de referencia de la Comisión Europea y la Norma Oficial Mexicana. En el 4% de las muestras se encontraron niveles de Cu no permisibles para consumo humano. Conclusiones. La industria cárnica de la región presenta una gran potencialidad para acceder a mercados internacionales, debido a que el 96% de las reses presentaron niveles de metales por debajo de los límites permisibles de México y Europa. A pesar de que los niveles de mercurio se encuentran en los límites permisibles, la evaluación del riesgo basado en el índice de peligrosidad, sugiere que el consumo diario de 100 gramos de productos cárnicos con niveles de 0.08 ppm, podría incrementar el riesgo de envenenamiento a una persona de 70Kg.
- Published
- 2011
185. Evaluación de la calidad microbiológica del agua envasada en bolsas producida en Sincelejo- Colombia
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Vidal, Jhon, Consuegra, Alfonso, Gomescaseres, Luty, Marrugo Negrete, José Luis, Vidal, Jhon, Consuegra, Alfonso, Gomescaseres, Luty, and Marrugo Negrete, José Luis
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Objective. To evaluate the microbiological quality of water for human consumption packed in bags, manufactured in Sincelejo (Colombia), as well as the physicochemical and operational variables that may affect it. Materials and methods. For the assessment of total and faecal coliforms, Pseudomonas aeruginosa and mesophiles in 13 brands of water packed in bags, the method of membrane filtration (FxM) was used. Results. 92% of the brands of water packed in bags manufactured in Sincelejo city, presented mesophilic bacteria in their product, while in 33% of them were found total coliform. In a brand fecal coliforms were detected, in another one Pseudomonas aeruginosa; the microbial reports were higher in the packaging plants with INVIMA registration. Conclusions. Much of the water plastic bag packed manufactured in Sincelejo, have a risk to consumers health, due to the presence of pathogenic microorganisms, which is related to inadequate production processes and intermittent supplies of the water used as feedstock., Objetivo. Evaluar la calidad microbiológica y fisico-quimica del agua envasada en bolsas producidad en la ciudad de Sincelejo-Colombia con destino al consumo humano. Materiales y métodos. Para la estimación de organismos coliformes totales y fecales, Pseudomona aeruginosa y mesófilos en el agua envasada de 13 marcas, se utilizó el método de filtración por membrana (FxM). Resultados. El 92 % de las marcas de agua envasada en bolsa que se produce en la ciudad de Sincelejo presentaron bacterias mesófilas en su producto, mientras que en el 33% de ellas se encontraron coliformes totales. Cabe destacar que una marca presentó coliformes fecales, otra Pseudomonas aeruginosa y el reporte microbiano fue mayor en las envasadoras que poseían registro INVIMA. Conclusiones. Gran parte del agua envasada en bolsas de la ciudad de Sincelejo genera un riesgo a la salud de los consumidores, debido a la presencia de microorganismos patógenos, lo que está relacionado con inadecuados procesos de producción y a la intermitencia del suministro del agua utilizada como materia prima.
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- 2009
186. Estudio de la contaminación por pesticidas organoclorados en aguas de la Ciénaga Grande del valle bajo del río Sinú
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Marrugo Negrete, José Luis, Díaz, Basilio, Lans, Edineldo, Marrugo Negrete, José Luis, Díaz, Basilio, and Lans, Edineldo
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- 2008
187. Electrokinetic remediation of mercurycontaminated soil, from the mine El Alacran-San Jorge river basin, Cordoba- Colombia
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López Barboza, Erick, primary and Marrugo Negrete, José Luis, additional
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- 2013
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188. Hallazgo de mercurio en peces de la ciénaga de ayapel, Córdoba, Colombia
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Marrugo Negrete, José Luis, Lans, Edineldo, Benítez, Luís, Marrugo Negrete, José Luis, Lans, Edineldo, and Benítez, Luís
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Objetive. To establish total mercury (Hg-T) concentrations in some fishes species in the Ayapel marsh (Colombia). Materials and methods. Sampling was conducted from July 2004 to June 2005, including both the dry and rainy seasons. Hg-T was analized by cold vapor atomic absorption spectroscopy after acid digestion. Results. The highest concentrations in Hg-T were observed for analized samples of the carnivorous specie Ageneiosus caucanus (0.504±0.103 mg Hg kg-1 fresh weight), and the lowest concentrations in the Iliophagus specie Prochilodus magdalenae (0.130±0.056 mg Hg kg-1 fresh wt). The highest Hg-T concentrations were found in the samples of the dry season. The Hg-T mean levels for fish samples did not exceed the human limit consumption level according to the World Health Organization (WHO, 0.5 mg Hg kg-1 fresh weight). Conclusions. The risk assessment based on the hazard index suggested that the consumption of 0.12 kg per day of fish (mainly carnivorous) could increase the risk of mercury poisoning in the local population., Objetivo. Determinar las concentraciones de mercurio total (Hg-T) en algunas especies de peces de la ciénaga de Ayapel (Colombia). Materiales y métodos. Los muestreos fueron realizados desde Julio de 2004 a Junio de 2005, incluyendo las épocas seca y lluviosa. Las muestras fueron analizadas por espectrometría de absorción atómica por vapor frío después de digestión ácida. Resultados. Las concentraciones más altas de Hg-T se observaron para las muestras analizadas de la especie carnívora Ageneiosus caucanus (0.504±0.103 mg Hg kg-1 peso fresco), y las menores concentraciones en la especie Iliófaga Prochilodus magdalenae (0.130±0.056 mg Hg kg-1 peso fresco). Las concentraciones más altas fueron encontradas en las muestras de la época seca. Los niveles promedio de Hg-T en las muestras de peces no excedieron el límite para consumo humano establecido por la Organización Mundial de la Salud (OMS, 0.5 mg Hg Kg-1 peso fresco). Conclusiones. La evaluación del riesgo basado en el índice de peligrosidad sugiere que el consumo de 0.12 kg de pescado por día en la población humana (principalmente carnívoros) podría incrementar el riesgo de envenenamiento por mercurio en la población local.
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- 2007
189. Metales pesados (Pb, Cd, Ni, Zn, Hg) en tejidos de Lutjanus synagris yLutjanus vivanus de la Costa de La Guajira, Norte de Colombia.
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Barros-Barrios, Orfelina, Doria-Argumedo, Carlos, and Marrugo-Negrete, José
- Abstract
Copyright of Veterinary & Animal Science / Veterinaria y Zootecnia is the property of Universidad de Caldas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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.)
- Published
- 2016
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190. Relationship Between Mercury Levels in Hair and Fish Consumption in a Population Living Near a Hydroelectric Tropical Dam
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Marrugo-Negrete, José Luis, primary, Ruiz-Guzmán, Javier Alonso, additional, and Díez, Sergi, additional
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- 2012
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191. Spatial and seasonal mercury distribution in the Ayapel Marsh, Mojana region, Colombia
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Marrugo-Negrete, José, primary, Benítez, Luís Norberto, additional, Olivero-Verbel, Jesús, additional, Lans, Edineldo, additional, and Gutierrez, Felipe Vazquez, additional
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- 2010
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192. Estudio de la contaminación por pesticidas organoclorados en aguas de la ciénaga grande del valle bajo del río Sinú
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Lans, Edineldo, primary, Marrugo Negrete, José Luis, primary, and Díaz, Basilio, primary
- Published
- 2008
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193. Total mercury and methylmercury concentrations in fish from the Mojana region of Colombia
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Marrugo-Negrete, José, primary, Verbel, Jesus Olivero, additional, Ceballos, Edineldo Lans, additional, and Benitez, Luis Norberto, additional
- Published
- 2007
- Full Text
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194. Evaluación de la capacidad acumuladora de mercurio del ají (Capsicum annuum).
- Author
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Pérez-Vargas, Híver M., Vidal-Durango, Jhon V., and Marrugo-Negrete, José L.
- Abstract
Copyright of Revista de Salud Pública is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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.)
- Published
- 2014
195. Exposición a COVs en fábricas de muebles de dos poblaciones del norte de Colombia.
- Author
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Vargas-Ramos, Yadiris E. and Marrugo-Negrete, José L.
- Abstract
Copyright of Revista de Salud Pública is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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.)
- Published
- 2014
196. Atmospheric deposition of heavy metals in the mining area of the San Jorge river basin, Colombia.
- Author
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Marrugo-Negrete, José, Urango-Cardenas, Ivan, Núñez, Saudith, and Díez, Sergi
- Abstract
To characterize the atmospheric content of chemical contaminants, samples of atmospheric deposits were collected at several sites in the mining area of the San Jorge river basin, Colombia, during La Niña events (May 2010 and October 2011). Measurements of trace metals (Hg, Cu, Cd, Pb, Ni, and Zn) were performed after rain collection using a bulk deposition sampler in locations near a point source and sampling points located within a range of 30 Km away from the mine. As expected, concentrations were elevated in locations close to the ferronickel mining area with similar levels to other highly polluted areas. Concentrations of bulk precipitation and deposition were measured for Zn (23.07 ± 7.30 ng mL and 227.5 ± 22.3 μg m day, respectively) and Ni (2.20 ± 1.35 ng mL and 21.2 ± 4.79 μg m day) close to the coal and ferronickel mining. The other metals showed higher concentrations in sites nearby the artisanal and small-scale gold mining communities; and mercury raises special concern because high values of bulk deposition were found (58.3 ± 4.4 μg m day), suggesting an intense Hg exposure in local residents. Moreover, no patterns of temporal distribution of heavy metals deposition were found during the sampling period. Overall, these results suggest that trace metal concentrations and fluxes are comparable to other locations in the world that are impacted by regional anthropogenic sources related to mining activities. [ABSTRACT FROM AUTHOR]
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- 2014
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197. Organochlorine Pesticides in Soils from the Middle and Lower Sinú River Basin (Córdoba, Colombia).
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Marrugo-Negrete, José, Navarro-Frómeta, Amado, and Urango-Cardenas, Iván
- Subjects
ORGANOCHLORINE pesticides ,SPRAYING & dusting in agriculture ,FOOD chains ,AGRICULTURAL industries - Abstract
After decades of intensive application to the croplands of the lower and middle Sinú River valleys in Córdoba Department, an area of important agricultural activity, organochlorine pesticides (OCPs) were officially banned from agricultural use in Colombia in the 1990s. Until now, no studies of the OCP residue levels and their vertical distributions in the soils of this area had been conducted. In the present study, 83 representative topsoil samples (0-20-cm depth) and four soil cores were collected. The OCP concentrations were quantified via gas chromatography with electron capture detection. The resulting data indicate that the principal pesticide residues in the soil samples from both the middle and lower Sinú River basin were 4,4′-DDT (1.78 ± 4.99 μg kg), 4,4′-DDD (3.55 ± 8.27 μg kg), α-chlordane (80.0 ± 200.0 μg kg), and lindane (280 ± 870.0 μg kg), which accounted for approximately 80 % of the total residues detected in both regions. Other pesticide residues, such as β-BCH and β-endosulfan (0.11 ± 0.4 and 2.91 ± 20 μg kg, respectively), were also detected. The presence of these organochloride pesticides could be attributed to past agricultural applications and/or the adulteration of pesticides that are not banned. Soil profiles from almost all sampled sites indicate that organochlorine residues remain in surface layers. Because these compounds are highly toxic, persist in the environment, and are strongly enriched through the food chain, these results indicate a substantial environmental risk from organochlorine pesticides in the study area. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
198. Phytoremediation of Soils Contaminated with Heavy Metals from Gold Mining Activities Using Clidemia sericea D. Don.
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Durante-Yánez, Elvia Valeria, Martínez-Macea, María Alejandra, Enamorado-Montes, Germán, Combatt Caballero, Enrique, and Marrugo-Negrete, José
- Subjects
GOLD mining ,PHYTOREMEDIATION ,MINE soils ,SOILS ,ENVIRONMENTAL health ,HEAVY metals - Abstract
Soils contaminated by potentially toxic elements (PTEs) as a result of anthropogenic activities such as mining are a problem due to the adverse effects on human and environmental health, making it necessary to seek sustainable strategies to remediate contaminated areas. The objective of this study was to evaluate the species Clidemia sericea D. Don for the phytoremediation of soils contaminated with PTEs (Hg, Pb, and Cd) from gold mining activities. The study was conducted for three months, with soils from a gold mining area in northern Colombia, and seeds of C. sericea, under a completely randomized experimental design with one factor (concentration of PTEs in soil) and four levels (control (T0), low (T1), medium (T2), and high (T3)), each treatment in triplicate, for a total of twelve experimental units. Phytotoxic effects on plants, bioconcentration (BCF), and translocation (TF) factors were determined. The results obtained for the tissues differed in order of metal accumulation, with the root showing the highest concentration of metals. The highest values of bioconcentration (BCF > 1) were presented for Hg at T3 and Cd in the four treatments; and of translocation (TF > 1) for Hg and Pb at T0 and T1; however, for Pb, the TF indicates that it is transferable, but it is not considered for phytoextraction. Thus, C. sericea demonstrated its potential as a phytostabilizer of Hg and Cd in mining soils, strengthening as a wild species with results of resistance to the stress of the PTEs evaluated, presenting similar behavior and little phytotoxic affectation on the growth and development of each of the plants in the different treatments. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
199. Drivers of biomagnification of Hg, As and Se in aquatic food webs: A review.
- Author
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Córdoba-Tovar, Leonomir, Marrugo-Negrete, José, Barón, Pablo Ramos, and Díez, Sergi
- Subjects
- *
BIOMAGNIFICATION , *MERCURY , *ADAPTIVE natural resource management , *FOOD composition , *ENVIRONMENTAL monitoring , *ENVIRONMENTAL protection - Abstract
Biomagnification of trace elements is increasingly evident in aquatic ecosystems. In this review we investigate the drivers of biomagnification of mercury (Hg), arsenic (As) and selenium (Se) in aquatic food webs. Despite Hg, As and Se biomagnify in food webs, the biomagnification potential of Hg is much higher than that of As and Se. The slope of trophic increase of Hg is consistent between temperate (0.20), tropical (0.22) and Arctic (0.22) ecosystems. Se exerts a mitigating role against Hg toxicity but desired maximum and minimum concentrations are unknown. Environmental (e.g. latitude, temperature and physicochemical characteristics) and ecological factors (e.g. trophic structure composition and food zone) can substantially influence the biomagnification process these metal (oids). Besides the level of bioaccumulated concentration, biomagnification depends on the biology, ecology and physiology of the organisms that play a key role in this process. However, it may be necessary to determine strictly biological, physiological and environmental factors that could modulate the concentrations of As and Se in particular. The information presented here should provide clues for research that include under-researched variables. Finally, we suggest that biomagnification be incorporated into environmental management policies, mainly in risk assessment, monitoring and environmental protection methods. • The drivers of biomagnification of Hg, As and Se in aquatic food webs were investigated. • Mercury has the highest biomagnification potential, whereas Se mitigate its toxicity. • Biomagnification depends on the biology, ecology and physiology of the organisms. • More info on biological and physiological factors for As and Se is needed. • Biomagnification data should be incorporated into environmental management policies. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
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200. Pb-derived Sedimentation Rates and C Fluxes in Soledad Lagoon (Cispatá Lagoon System, NW Caribbean Coast of Colombia).
- Author
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Ruiz-Fernández, Ana, Marrugo-Negrete, José, Paternina-Uribe, Roberth, and Pérez-Bernal, Libia
- Subjects
RIVER sediments ,CLIMATE change ,DISSOLVED organic matter ,MANGROVE plants ,CARBON sequestration ,COASTS ,BIOTIC communities - Abstract
With the aim of evaluating temporal changes in sedimentation and organic carbon (C) supplied over the last ~100 years, a sediment core was collected at Soledad Lagoon, a costal ecosystem surrounded by mangroves, located in the Cispatá Estuary (Caribbean coast of Colombia). The core sediments were characterized by low concentrations of calcium carbonate (0.2-2.9%), organic matter (3-8%), total nitrogen (0.11-0.38%), and total phosphorus (0.19-0.65 mg g). Fe and Al concentrations ranged from 4% to 5%, and Mn from 356 to 1,047 μg g. The Pb-derived sediment and mass accumulation rates were 1.54 ± 0.18 mm year and 0.08 ± 0.01 g cm year, respectively. The sediment core did not provide evidence of human impact, such as enhancement of primary production or nutrient enrichment, which may result from recent land uses changes or climate change. The C fluxes estimated for Soledad Lagoon core lay in the higher side of carbon fluxes to coastal ecosystems (314-409 g m year) and the relatively high C preservation observed (~45%) indicate that these lagoon sediments has been a net and efficient sink of C during the last century, which corroborate the importance of mangrove areas as important sites for carbon burial and therefore, long-term sequestration of C. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
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