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11 results on '"Fuentes-Gandara, Fabio"'

2. Elemental imaging approach to assess the ability of subaerial biofilms growing on constructions located in tropical climates as potential biomonitors of atmospheric heavy metals pollution

Author

Gallego-Cartagena, Euler, primary, Morillas, Héctor, additional, Morgado-Gamero, Wendy, additional, Fuentes-Gandara, Fabio, additional, Vacca-Jimeno, Víctor, additional, Salcedo, Isabel, additional, Madariaga, Juan Manuel, additional, and Maguregui, Maite, additional

Published
2022
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5. Heavy metal pollution and toxicity assessment in Mallorquin swamp: A natural protected heritage in the Caribbean Sea, Colombia

Author

Díez, Sergi [0000-0002-9870-2179], Fuentes-Gandara, Fabio, Pinedo-Hernández, José, Gutiérrez, Edwin, Marrugo-Negrete, José Luis, Díez, Sergi, Díez, Sergi [0000-0002-9870-2179], Fuentes-Gandara, Fabio, Pinedo-Hernández, José, Gutiérrez, Edwin, Marrugo-Negrete, José Luis, and Díez, Sergi

Abstract

This work reports the level and ecotoxicity impact of metals in the sediments of the Mallorquín swamp, a protected coastal lagoon in the Caribbean coast of Colombia. The distribution of metals was in the following decreasing order: Zn > Cu > Pb > Cd > Hg, showing statistically significant differences among sites. The average Pb and Cd concentrations in sediments were about 17 and 5 times higher, respectively, compared to those in background values. Several contamination indices suggested moderate contamination of Hg, Cu, and Zn, and strong pollution due to Cd and Pb. Multivariate analysis revealed spatial variations for metals and its anthropogenic origin, such as municipal and industrial wastewater discharges (Pb, Zn, and Hg) and agricultural activities (Cd and Cu). These findings showed the negative impact of human activities and the need to apply protective management strategies.

Published
2021

9. Human health impacts of exposure to metals through extreme consumption of fish from the Colombian Caribbean Sea.

Author

Fuentes-Gandara, Fabio, Pinedo-Hernández, José, Marrugo-Negrete, José, and Díez, Sergi

Subjects
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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10. Reactividad del Aminal Macrociclico1:3,7:9,13:15,19:21- Tetrametilentetrahexahidropirimidina (Tmtp) con Fenoles P-Sustituidos

Author

Alcázar Franco, Daniel Jesús, Herrera Herrera, Claudia Patricia, Fuentes Gandara, Fabio Armando, Alcázar Franco, Daniel Jesús, Herrera Herrera, Claudia Patricia, and Fuentes Gandara, Fabio Armando

Abstract

Una nueva serie de compuestos de estructuras tipo 1,3-hexahidropirimidina se logró sintetizar, con el fin de comprobar y ratificar la reactividad del aminalmacrociclico: 1:3,7;9,13;15,19;21-tetrametilentetrahexahidropirimidina (TMTP) con fenoles para-sustituidos, empleando reacciones tipo Mannich enmedio alcalino. Las estructuras se elucidaron por métodos espectroscópicos, las cuales mostraron compuestos consistentes con las estructuras propuestas. Los compuestos sintetizados no se encuentran reportados en la literatura consultada., Una nueva serie de compuestos de estructuras tipo 1,3-hexahidropirimidina se logró sintetizar, con el fin de comprobar y ratificar la reactividad del aminalmacrociclico: 1:3,7;9,13;15,19;21-tetrametilentetrahexahidropirimidina (TMTP) con fenoles para-sustituidos, empleando reacciones tipo Mannich en medio alcalino. Las estructuras se elucidaron por métodos espectroscópicos, las cuales mostraron compuestos consistentes con las estructuras propuestas. Los compuestos sintetizados no se encuentran reportados en la literatura consultada.

Published
2012

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