Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

Hernández, María Valentina Fuentes; Gamboa, Octavio Antonio Sanguinetti; Astudillo, Luisa Lucina Rojas de

doi:10.20937/rica.2019.35.01.07

Cited by 5 publications

(10 citation statements)

References 26 publications

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“…When the EF values of surface sediments of Lake Maracaibo are compared with those of other aquatic ecosystems (Table S1), it is observed that the As and Pb levels are higher than those of the Bay of Bengal, Bangladesh [63], which has been described as an environment with a high level of anthropogenic impact. Regarding the EF-Cd values, these are similar to those of the Gulf of Cariaco, Venezuela [62], whose pollution degree is moderately severe. Likewise, the enrichment values for Ni and Cu are lower than those of Chaohu Lake, China [14] and Gulf of Cariaco, Venezuela [62], with moderate anthropic impact levels.…”

Section: Elemental Enrichment Levels In Surface Sedimentssupporting

confidence: 64%

“…Regarding the EF-Cd values, these are similar to those of the Gulf of Cariaco, Venezuela [62], whose pollution degree is moderately severe. Likewise, the enrichment values for Ni and Cu are lower than those of Chaohu Lake, China [14] and Gulf of Cariaco, Venezuela [62], with moderate anthropic impact levels.…”

Section: Elemental Enrichment Levels In Surface Sedimentssupporting

confidence: 64%

“…The PTE concentrations found in superficial sediments of Lake Maracaibo contrast with those of some water bodies (Table S1). The Cr, Ni, Cu and Zn levels, for example, are lower than those of Chaohu Lake, China [14] and Bahía Blanca Estuary, Argentina [60], while the Cd and Pb concentrations are greater than those reported for Gala Lake, Turkey [61], Gulf of Cariaco, Venezuela [62] and Bay of Bengal, Bangladesh [63]. The As concentrations, meanwhile, are lower than those found in the Guadiana Estuary, Spain [64], and higher than those of the Gala Lake, Turkey [61].…”

Section: Distribution Of Potentially Toxic Elements In Surface Sedimentsmentioning

confidence: 99%

“…Thus, the greatest potential for ecological risk was for Cd, Hg and Pb, which corresponds with the results of TEL/PEL [49], ERL/ERM [50] and SQGs [48] biotoxic sediment guidelines. Tokatli [61] reported m-ERM-Q values from 0.078 to 0.406 for sediments from Gala Lake (Turkey) including As, Cr, Cu, Pb, Zn, Cd and Ni (higher contribution of Cr, Ni and Zn), while Fuentes-Hernández et al [62] presented levels between 0.13 and 0.30 with Zn, Cd, Cr, Cu, Ni and Pb (higher contribution of Cd and Ni) for sediments from the Gulf of Cariaco (Venezuela). These data are comparable to those found in Lake Maracaibo (greater contribution of Cd, Hg and Pb (Table S1), establishing a probability of multielemental toxicity of 21%, with low-medium repercussions on the biological communities of this water body.…”

Section: Potential Ecological Risk Associated With Potentially Toxic Elements In Sedimentsmentioning

confidence: 99%

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Ecological risk by potentially toxic elements in surface sediments of the Lake Maracaibo (Venezuela)

Marı́n

Colina

Ledo

et al. 2021

Environmental Engineering Research

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The evaluation of potential ecological risk of aquatic sediments associated with the presence of potentially toxic elements (PTE) determines its degree of danger on native biota. In this work, the potential ecological risk of V, Ti, Cr, Ni, Cu, Zn, As, Se, Cd, Sn, Hg and Pb in superficial sediments is explained in three different areas of Lake Maracaibo: El Tablazo Bay, Strait of Maracaibo and the lake itself, through a multi-guideline approach (elemental enrichment (enrichment factor, contamination degree, pollutant load index and geo-accumulation index), sediment quality guidelines and risk assessment code). The PTE levels ranged from < 0.025 to 176.722 mg·kg−1 DW, with an overall proportion of V > Ti > Pb > Zn > Cr > Cu > Ni > As > Cd > Se > Hg > Sn. The PTE concurrent effect on biota was El Tablazo Bay > lake > Strait of Maracaibo. The superficial sediments of Lake Maracaibo constitute a medium with a high potential ecological risk on estuarine biota. This is mainly due to the levels of As in El Tablazo Bay, Cd in the Strait of Maracaibo and Pb in the lake area. This represents a latent toxicity hazard for native biological communities and other associated organisms.

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Section: Elemental Enrichment Levels In Surface Sedimentssupporting

confidence: 64%

Section: Elemental Enrichment Levels In Surface Sedimentssupporting

confidence: 64%

Section: Distribution Of Potentially Toxic Elements In Surface Sedimentsmentioning

confidence: 99%

Section: Potential Ecological Risk Associated With Potentially Toxic Elements In Sedimentsmentioning

confidence: 99%

See 2 more Smart Citations

Ecological risk by potentially toxic elements in surface sediments of the Lake Maracaibo (Venezuela)

Marı́n

Colina

Ledo

et al. 2021

Environmental Engineering Research

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“…Como toda zona resguardada, la energía del agua es baja y las partículas se transportan preeminentemente suspendidas, lo cual justifica la presencia de sedimentos mal clasificados con detritos de rocas sedimentarias, esqueletos, conchas de moluscos, arrecifes (Fuentes-Hernández et al 2019) La fracción gruesa del sedimento seco (> 2 mm) fue separada por tamización en un equipo Ro-Tap con una columna Tyler; mientras que las fracciones menores, limo y arcilla, por sedimentación, con el método del hidrómetro densímetro (Bouyoucos, 1962). Para ello, la muestra se mezcló con polifosfato de sodio y agua destilada, agitó, homogeneizó y procesó como está descrito en Primo & Carrasco (1973).…”

Section: Materiales Y Métodosunclassified

Condición ambiental del sedimento del sector oriental del golfo de Cariaco

Hernández¹

2021

Rev. Mar. Cost.

Self Cite

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En 2008, se evaluó la condición ambiental del sedimento de la región oriental del golfo de Cariaco (Venezuela) al relacionar las concentraciones químicas de metales traza e hidrocarburos policíclicos aromáticos (HAP) con las respuestas a pruebas toxicológicas estandarizadas. Para ello, en abril, los metales particionados en el sedimento y en el agua retenida fueron extraídos y medidos con ICP-OES. Los HAP fueron separados del sedimento con ultrasonido y medidos con HPLC-fluorescencia. Además, se ejecutaron pruebas de supervivencia de Artemia y actividad hemolítica. Las concentraciones de metales totales (µg g-1) fueron: Cu (29-91), Cd (1.9-4.9), Cr (4-36 ), Ni (10-33), Pb (3-9) y Zn (32-112). En el agua fueron detectados, en µg L-1: Pb (33-56) y Cr (154-237). Las concentraciones de HAP (3-5 anillos) fueron bajas, con predominio de fluoranteno (22-71 ng g-1), en particular, pirolítico. Solamente, en algunas localidades, las concentraciones de Cu, Ni y Cd del sedimento superaron los criterios de calidad. No hubo mortandad de larvas durante las pruebas toxicológicas y la actividad hemolítica fue menor que 2%. Una vez realizado el contraste se demuestra que los sedimentos tienen alta calidad ecológica.

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Environmental characterization of the estuarine zone of the Gulf of Montijo, province of Veraguas, Panama

et al. 2023

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The study was performed in the Republic of Panama. Panama has a coastline of 2,988.3 km, of which 1,700.6 km corresponds to the Pacific coast. Most of the coast is flat, and several geomorphological features characterize the Panamanian coastal sector, such as the Gulf of Montijo, which is located towards the west of the Panamanian Pacific coast in the province of Veraguas. The Gulf is a remarkable ecosystem of mangroves well preserved and internationally recognized as a Ramsar area. It represents the buffer zone of Coiba Island (Coiba National Park). Sixteen sampling stations were established along the coast to analyze the vertical and spatial variability of physical and chemical parameters (temperature, salinity, dissolved oxygen, pH, and conductivity). The quality of unexposed marine sediment was evaluated in four samples from the western sector of the Gulf of Montijo. The marine sediment samples were collected with a Dietz-LaFond Snapper dredge, between 1.5 and 3.0 m depth. Physical and chemical observations and marine sediment sampling were carried out during high tide +4 to low tide +3, in negative syzygy phase tide. The analysis of the oceanographic conditions, especially the physical and chemical properties of the water along with the longitudinal profile, showed a conservative distribution increasing gradually towards the outer region in an approximately linear way due to the dilution and mixing processes, both in the surface layer and at the bottom, and a not very developed vertical gradient, with slight stratification. The results of heavy metal analyses in marine sediments report high cadmium concentrations along the west coast, with concentrations above the limit levels of the Canadian marine sediment quality guidelines. The study area requires continuous monitoring that is representative of seasonality (dry, intermediate, and rainy periods), including a more significant number of stations since it is evidence of an affectation of the environmental quality of the marine ecosystem due to possible anthropogenic activities.

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Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

Cited by 5 publications

References 26 publications

Ecological risk by potentially toxic elements in surface sediments of the Lake Maracaibo (Venezuela)

Ecological risk by potentially toxic elements in surface sediments of the Lake Maracaibo (Venezuela)

Condición ambiental del sedimento del sector oriental del golfo de Cariaco

Environmental characterization of the estuarine zone of the Gulf of Montijo, province of Veraguas, Panama

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