| Revue: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000417590 |
| ISSN: | 0001-3765 |
| Autores: | Silva, Carlos A. Ramos e1 Fonseca, Estefan M. da1 Grotto, Beatriz W1 Souza, Flavo E.S. de2 Baptista-Neto, Jose A1 |
| Instituciones: | 1Universidade Federal Fluminense, Programa de Pos-Graduacao em Dinamica de Oceanos e Terra, Niteroi, Rio de Janeiro. Brasil 2Universidade Federal do Rio Grande do Norte, Escola de Agronomia de Jundiai, Macaíba, Rio Grande do Norte. Brasil |
| Año: | 2017 |
| Periodo: | Dic |
| Volumen: | 89 |
| Número: | 4 |
| Paginación: | 2597-2608 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Estuarine sediments represent important pools of trace metals, released from both anthropogenic and natural sources. Fluctuations in the water column physicochemical conditions, on the other hand, may transfer metals from solid to liquid compartment and resulting in contamination of the surrounding environment. The present research was carried out to evaluate the weakly bounded heavy metal levels in tropical hyper-saline and positive estuaries, in order to quantify its potentially availability. The monitoring includes five metals (Cd, Cr, Cu, Pb, Zn) and cover nine estuaries in Rio Grande do Norte state/Brazil, including four hypersaline and five true estuaries. 50 surface sediment samples were collected in each estuary. At the same time, organic matter concentrations were evaluated in order to help explaining possible local variations in heavy metal levels. Organic matter results (0.7% - 7.3%) suggest the positive Potengi estuary as the most critical environmental quality situation. On the other hand, according to heavy metals levels, both Conchas and Potengi estuaries registered the higher concentrations of Cr. The highest concentrations were observed in the hyper-saline estuaries, with the exception of the Zn. The present study revealed that the watershed occupation has significantly influenced the heavy metal concentrations in the estuaries |
| Disciplinas: | Geociencias |
| Palabras clave: | Hidrología, Geología, Sedimentos superficiales, Metales pesados, Estuarios, Transporte de sedimentos, Calidad del agua |
| Keyword: | Hydrology, Geology, Surface sediments, Heavy metals, Estuaries, Sediment transport, Water quality |
| Texte intégral: | Texto completo (Ver HTML) |
