Evaluation of the availability of heavy metals in lake sediments using SR-TXRF

Vives, A. E. S.; Brienza, Sandra Maria Boscolo; Moreira, Silvana; Zucchi, Orghêda Luíza Araújo Domingues; Barroso, R.C.; Filho, Virgílio Franco do Nascimento

doi:10.1016/j.nima.2007.04.111

Cited by 5 publications

(2 citation statements)

References 6 publications

(6 reference statements)

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“…Figure 2 shows the results of the metal(loid) fractionation according to the sequential extraction procedure for the stations SB, REG, and EPP. The total sum of elements contents in the mobile fraction (M = ΣF(0-3)) seems to be more bioavailable (Pérez-López et al 2008) and with potential toxicity and hazardous for the environment (Vives et al 2007). Meanwhile, elements collected in the residual fraction (R = F4) are associated with the lithological form considered less reactive and less bioavailable.…”

Section: Resultsmentioning

confidence: 99%

Metal contamination and fractionation in sediments from the lower basin of the Vale do Ribeira (SE, Brazil)

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Buruaem

Morais

et al. 2017

Environ Monit Assess

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The sediment quality of Ribeira de Iguape River is affected by former Pb extraction mining. Some studies affirm the restoration status of the basin, however, mobility of metals and its associated risk is still questioned. This study integrates the metal concentrations in the lower part of the basin with different contamination source to determine the existence of risks associated with the mobile fractions of the geochemical matrix. Despite concentrations of metals were low and the environmental risk factor values were negative, our results indicated that As, Mn, Pb, and V were present in the most labile forms. The multivariate analysis conducted using metal concentrations, environmental risk factor values and speciation suggested that any risk would be associated with the labile fractions of the analyzed elements, especially for Pb. The station from Registro was stressed by Co, Pb and Zn; with Pb under the reactive fraction that could be associated with high mobility and potential bioavailability.

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Section: Resultsmentioning

confidence: 99%

Metal contamination and fractionation in sediments from the lower basin of the Vale do Ribeira (SE, Brazil)

Bonnail

Buruaem

Morais

et al. 2017

Environ Monit Assess

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“…Os elementos P, K, Ca, Ti, Fe, Sr, Ba e Pb foram quantificados em várias amostras. As razões K/Ca, K/P e Pb/Ca foram determinadas e mostraram um decréscimo na direção da casca.A Fluorescência de Raios X por Reflexão Total com Radiação Síncrotron foi empregada para avaliar a contaminação e a biodisponibilidade de metais pesados em amostras de sedimento coletados a diferentes profundidades porVIVES et al (2007).Para a excitação das amostras foi usado em feixe policromático de aproximadamente 2 mm (largura) e 0,3 mm (altura) enquanto que para a detecção dos raios X foi empregado um detector de Si(Li). As áreas líquidas dos picos de raios X foram obtidas pelo programa potencialmente tóxicos.…”

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Avaliação de metais pesados em emissões atmosfericas de industria automotiva por fluorescencia de raios X

Neto¹,

Moreira²

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Thesis (Master's degree).The air quality has a direct link with the life quality society, lately, a large number of cases of air pollution have been happening in the great urban centers, as well as diseases caused by the poor air quality. These facts have forced the government organs to create standards for the air regulations and also for the atmospheric emissions that generally are the main responsible for the air quality alterations. This study had as goal the determination of heavy metals and other elements (

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Bioavailability and toxicity of metals from a contaminated sediment by acid mine drainage: linking exposure–response relationships of the freshwater bivalve Corbicula fluminea to contaminated sediment

Sarmiento

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Nieto

et al. 2016

Environ Sci Pollut Res

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Streams and rivers strongly affected by acid mine drainage (AMD) have legal vacuum in terms of assessing the water toxicity, since the use of conventional environmental quality biomarkers is not possible due to the absence of macroinvertebrate organisms. The Asian clam Corbicula fluminea has been widely used as a biomonitor of metal contamination by AMD in freshwater systems. However, these clams are considered an invasive species in Spain and the transplantation in the field study is not allowed by the Environmental Protection Agency. To evaluate the use of the freshwater bivalve C. fluminea as a potential biomonitor for sediments contaminated by AMD, the metal bioavailability and toxicity were investigated in laboratory by exposure of clams to polluted sediments for 14 days. The studied sediments were classified as slightly contaminated with As, Cr, and Ni; moderately contaminated with Co; considerably contaminated with Pb; and heavily contaminated with Cd, Zn, and specially Cu, being reported as very toxic to Microtox. On the fourth day of the exposure, the clams exhibited an increase in concentration of Ga, Ba, Sb, and Bi (more than 100 %), followed by Co, Ni, and Pb (more than 60 %). After the fourth day, a decrease in concentration was observed for almost all metals studied except Ni. An allometric function was used to determine the relationship between the increases in metal concentration in soft tissue and the increasing bioavailable metal concentrations in sediments.

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Evaluation of the availability of heavy metals in lake sediments using SR-TXRF

Cited by 5 publications

References 6 publications

Metal contamination and fractionation in sediments from the lower basin of the Vale do Ribeira (SE, Brazil)

Metal contamination and fractionation in sediments from the lower basin of the Vale do Ribeira (SE, Brazil)

Avaliação de metais pesados em emissões atmosfericas de industria automotiva por fluorescencia de raios X

Bioavailability and toxicity of metals from a contaminated sediment by acid mine drainage: linking exposure–response relationships of the freshwater bivalve Corbicula fluminea to contaminated sediment

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