Distributions of trace metals in sediment cores from a hypertrophic reservoir in northeast Brazil

Santos, Izaias S.; Garcia, Carlos Alexandre Borges; Passos, Elisangela Andrade; Alves, Jose P. H.

doi:10.1590/s0103-50532013000200011

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The metals in the sediments may re-solubilize in different chemical forms due to changes in environmental conditions such as pH, redox potential (Eh), dissolved oxygen and presence of organic carbon [13][14][15][16] . The analysis of heavy metals in sediments allows us to detect contamination and also provides information on the critical areas of aquatic systems 1,7,9,17,19,20 . Bioavailability of metals in sediments has a direct impact on some aquatic species, many of which can accumulate high concentrations of metals that can cause chronic effects on their populations 21 .…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Concentrations in Water and Sediments From Affluents and Effluents of Mediterranean Chilean Reservoirs

Copaja

Nuñez

Muñoz

et al. 2016

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

RIVER flows have constant interaction between water and bed sediments; for this reason knowledge of the characteristics of the sediments is fundamental to understand water chemistry. This study determined the concentrations of heavy metals in water and sediments in the affluents and the effluents of the Mediterranean Chilean reservoirs Cogotí, Corrales, La Paloma, and Recoleta. We explore possible ecological risk and toxicity using the enrichment factor (EF), risk assessment code (RAC), threshold effect concentrations (TEC) and probable effect concentrations (PEC). The results showed that five metals: Al, Fe, Cu, Mn and Zn out of the ten measured metals were detected in both surface water and the sediments. The risk assessment code (RAC) suggested that Fe represents a medium risk in the affluent of Cogotí Reservoir: Cu, Zn and Mn represent a medium to high risk in all the dams and in both zones (affluents and effluents). The enrichment factor (EF) determined that the five metals were lithogenic. Fe, Cu, and Mn are the elements that present the greatest toxicity to microorganisms in these aquatic systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Heavy Metal Concentrations in Water and Sediments From Affluents and Effluents of Mediterranean Chilean Reservoirs

Copaja

Nuñez

Muñoz

et al. 2016

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…The total concentration of metals present in the sediment samples from Água Preta lake is shown in Table 2. (HAKANSON, 1980;SANTOS et al, 2013). The range between the TEL and PEL represents values that could have a variety of adverse ecological effects.…”

Section: Metals Determinationmentioning

confidence: 99%

<b>Diffuse sources of pollution and their influence on the nature of the sediments in Água Preta Lake

et al. 2015

View full text Add to dashboard Cite

ABSTRACT. Sediments in aquatic systems are indicators of contamination levels. Therefore, they play an important role in the assessment of the nature and intensity of human impact on aquatic environments. The objective of this work was to assess the levels of pollution by determining the concentrations of various metals and phosphorus forms in the sediments of Água Preta Lake, which supplies water to the Metropolitan Region of Belém, in north-eastern Brazil. Our data indicate non-uniform sedimentation with a large granulometric fraction of silt. The predominant form of phosphorus was inorganic phosphorus, to the detriment of the organic form. Observed mean concentrations of nickel, copper, lead, and zinc were lower than the PEL (Probable Effect Level). However, the highest observed concentrations of nickel and lead exceeded the prescribed TEL (Threshold Effect Level), which suggests pollution from an anthropogenic source.Keywords: trace elements, phosphorus, contamination. Fontes difusas de poluição e sua influência na natureza dos sedimentos do Lago Água PretaRESUMO. Os sedimentos desempenham um importante papel na avaliação da intensidade e das formas de impacto sobre um meio aquático, porque funcionam como indicadores de níveis de contaminação. O objetivo deste trabalho foi avaliar as concentrações de metais e formas de fósforo em sedimentos do Lago Água Preta, que fornece água para a Região Metropolitana de Belém. Os dados obtidos indicam um reservatório com sedimentos não-uniformes, e uma maior fração granulométrica de silte. A forma predominante de fósforo foi o inorgânico, em detrimento da forma orgânica. As concentrações obtidas para o níquel, cobre, chumbo e zinco foram menores do que o PEL ("Probable Effect Level"). O níquel e chumbo representado níveis mais elevados do que os sugeridos pelo TEL ("Threshold Effect Level"), o que sugere uma influência antropogênica.Palavras-chave: elementos traços, fósforo, contaminação.

show abstract

“…Monitoring of water quality in the most traditional way depends on in situ measurements and frequent laboratory analysis of the samples. This type of point sampling method is the most usual one to allow accurate measurements [5][6][7].…”

mentioning

confidence: 99%

Evolution on the Water Quality in Sergipe Hinterland Reservoirs, Northeast Brazil

Garcia¹,

Melo²,

Garcia³

et al. 2017

JESE-B

View full text Add to dashboard Cite

Population growth has consequences for intense use of aquatic ecosystems. Samples were taken, between 2013 and 2014, in the reservoirs "Algodoeiro" and "Gloria" in Sergipe, Brazil. TSI (Trophic State Index) and WQI (Water Quality Index) were used. It was determined the parameters such as conductivity, dissolved oxygen, total nitrogen, total phosphorus and chlorophyll. TSI has been applied, in "Algodoeiro", which was classified as mesotrophic. With the increase of rainfall in 2014, this reservoir changed its condition to eutrophic. "Gloria" reservoir was already classified in super-eutrophication. Regarding the WQI, the reservoirs were classified in Class IV, indicating a critically degraded condition.

show abstract

Distributions of trace metals in sediment cores from a hypertrophic reservoir in northeast Brazil

Cited by 3 publications

References 0 publications

Heavy Metal Concentrations in Water and Sediments From Affluents and Effluents of Mediterranean Chilean Reservoirs

Heavy Metal Concentrations in Water and Sediments From Affluents and Effluents of Mediterranean Chilean Reservoirs

<b>Diffuse sources of pollution and their influence on the nature of the sediments in Água Preta Lake

Evolution on the Water Quality in Sergipe Hinterland Reservoirs, Northeast Brazil

Contact Info

Product

Resources

About