Influence of watershed lithology on heavy metal levels in estuarine sediments and organisms in Galicia (North-West Spain)

Carral, Emilio; Villares, Ramón; Puente, Xoán; Carballeira, A.

doi:10.1016/0025-326x(95)00017-h

Cited by 78 publications

(35 citation statements)

References 8 publications

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“…On the contrary, Fe, V, Cr, Zn, Ni, and Co were found the highest (78.6-85. 0%, 58.8-81.7%, 47.4-68.6%, 40.4-61.7%, 35.6-60.6%, and 33.8-44.7%, respectively) in the residual fraction bound in mineral lattice, from which release of heavy metals is unlikely under environmental conditions (Carral et al 1995), indicating relatively less mobility and bioavailability and less harmful to the environment.…”

Section: Metal Speciationmentioning

confidence: 96%

Speciation and ecological risk of heavy metals in intertidal sediments of Quanzhou Bay, China

Wang

2009

Environ Monit Assess

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The chemical speciation of nine heavy metals in intertidal sediments from Quanzhou Bay was determined using a modified sequential extraction procedure, proposed by the Commission of the European Community Bureau of Reference. The results show that Mn presents the highest percentage in the acid-soluble fraction, and Pb and Cu present the highest percentages in the reducible fraction. The highest percentages of Fe, V, Cr, Ni, Zn, and Co were found in the residual fraction. The mobility order of the heavy metals studied on the basis of the nonresidual content of the elements is Mn > Pb > Cu > Co > Zn > Ni > Cr > V > Fe. The assessment on potential ecological risk indices of some heavy metals indicates that Zn, Ni, and Cr show moderate contamination, while Cu and Pb show slighter contamination. On the whole, the comprehensive potential ecological risk index of Cu, Zn, Ni, Cr, and Pb in the sediments presents moderate degree.

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Section: Metal Speciationmentioning

confidence: 96%

Speciation and ecological risk of heavy metals in intertidal sediments of Quanzhou Bay, China

Wang

2009

Environ Monit Assess

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“…To evaluate the degree of contamination or the increase in metal contribution to the environment Carral et al [10] describe that it is necessary to determine, the levels of natural metals (background concentrations) in the studied environment to evaluate the impact of anthropic actions. In this study, the results obtained by Brayner et al [5] in the analysis of samples collected in a preserved mangrove area, and the same characteristics being found in studied sediments, was used as background.…”

Section: Discussionmentioning

confidence: 99%

Heavy metal concentrations in sediments of the Capibaribe River Estuary in the Metropolitan Region of Recife, Pernambuco-Brazil

Macêdo¹,

Silva²,

Brayner³

et al. 2007

WIT Transactions on Ecology and the Environment, Vol 102

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The objective of this research was to assess the heavy metal concentration in sediments from the Capibaribe river estuary located in Recife City (Pernambuco, Brazil). Sampling was carried out in the rainy and dry seasons in six fixed stations along the river estuary during the rainy/2002 and dry/2003 seasons. Superficial sediment samples were collected between 0 -10 cm deep, during low tide. 14 traps were also used and the settled sediment collected 24 hours later. Dissolved oxygen, pH, salinity, temperature and water transparency data were obtained in the same stations. To quantify cadmium, cobalt, copper, chromium, iron, lead, manganese, nickel and zinc metals an Atomic Emission Spectrometer with Inductive Coupled Plasma (ICP-AES) method was used. No cobalt, lead or nickel were detected, all of them below the quantifying limit. The obtained results to both sediments and sedimentary material showed concentration levels above "background" indicating a high level of contamination in the study area. The pH, salinity, temperature and water transparency parameters results are as expected to estuarine areas. The dissolved oxygen content indicated that pollution is threatening the water quality in the area studied.

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“…Elements of natural origin which are combined to one or more of major fine-grained trace metal carriers are considered conservative. Several conservative elements have been used for normalization purposes: aluminum (Bertine and Goldberg 1977;Carral et al 1995). The main component of elements in sediments is the aluminosilicate.…”

Section: Heavy Metal Distributionsmentioning

confidence: 99%

Heavy metal concentrations in surface sediments from two regions (Saros and Gökova Gulfs) of the Eastern Aegean Sea

Uluturhan

2009

Environ Monit Assess

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The main goal of this study is to determine the present heavy metal pollution state in the two gulfs of the Aegean Sea; Saros and Gökova Gulfs. The surface sediments were collected from 11 and eight locations in the Saros and Gökova during May 2001, respectively. The results showed that the sediments of Saros and Gökova gulfs were polluted with Pb, Cr, Zn, Mn, and Ni and Pb, Cr, Ni, and Mn, respectively. For various metals the contamination factor (CF) has been calculated to assess the degree of pollution in sediments. The sediments were noted to be not contaminated with Hg, Cd, and Cu in all areas. Moderate contaminations were observed for Pb, Cr, and Zn in Saros Gulf. The CF was moderate and very high for Ni in the Saros and the Gökova Gulf, respectively.

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Influence of watershed lithology on heavy metal levels in estuarine sediments and organisms in Galicia (North-West Spain)

Cited by 78 publications

References 8 publications

Speciation and ecological risk of heavy metals in intertidal sediments of Quanzhou Bay, China

Speciation and ecological risk of heavy metals in intertidal sediments of Quanzhou Bay, China

Heavy metal concentrations in sediments of the Capibaribe River Estuary in the Metropolitan Region of Recife, Pernambuco-Brazil

Heavy metal concentrations in surface sediments from two regions (Saros and Gökova Gulfs) of the Eastern Aegean Sea

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