Heavy Metal Distribution in Sediment Cores from Western Ross Sea (Antarctica)

Ravanelli, M.; Tubertini, O.; Valcher, S.; Martinotti, W.

doi:10.1007/978-94-011-5552-6_71

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…The average molar PFe:PAl (0.3 ± 0.1) obtained from Totten 1 ice is very close to values previously reported for the continental crust (0.3; Taylor & McLennan, 1985), suggesting a predominantly lithogenic source. Interestingly, this elemental ratio differs significantly ( p < 0.01) from the ones measured at Casey 1 and 2 (0.5 ± 0.2), which were very close to the ratio reported for ocean floor sediments (0.48; Ravanelli, 1997). Therefore, while stations near Casey seem to be highly dependent on sediment resuspension as the main source of Fe, another source may prevail at Totten 1.…”

Section: Discussionsupporting

confidence: 82%

Nutrient Distribution in East Antarctic Summer Sea Ice: A Potential Iron Contribution From Glacial Basal Melt

et al. 2020

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Phytoplankton growth can be limited by the availability of the essential nutrient iron (Fe; Baar et al., 1990, 1995). The Southern Ocean (SO) is a classic example where high concentrations of macronutrients (nitrate, phosphate, and silicic acid) do not support the expected level of primary production due to low Fe concentrations. The SO has therefore been designated as a High Nutrient Low Chlorophyll (HNLC) area (Martin, 1990). In this context, sea ice plays a pivotal role as a natural and biogeochemically active Fe reservoir due to the high levels of Fe and organic matter concentrated from seawater during its formation

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Section: Discussionsupporting

confidence: 82%

Nutrient Distribution in East Antarctic Summer Sea Ice: A Potential Iron Contribution From Glacial Basal Melt

et al. 2020

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“…In a river system, stream sediments have been widely used as environmental indicators and their chemical analysis can provide significant information on the assessment of anthropogenic activities (Shriadah, 1999;Singh et al, 2002;Gaur et al, 2005;Valdés et al, 2005). Thus, in water bodies, sediments form an important repository of heavy metals (Ravanelli et al, 1997;Ranjbar, 1998;Fabbri et al, 2001;Kamau, 2001;Mathew et al, 2003;Sekhar et al, 2003;Panda et al, 2006;Nemr et al, 2006;Veen et al, 2006), and the heavy metal pollution of aquatic ecosystems is often most obviously reflected in high metal levels in sediments, macrophytes and benthic animals, than in elevated concentrations in water (Linnik and Zubenko, 2000;Badran and Zibdah, 2005;Jain et al, 2005).…”

Section: Introductionmentioning

confidence: 98%

Metals pollution in freshly deposited sediments from river Mingoa, main tributary to the Municipal lake of Yaounde, Cameroon

et al. 2008

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Freshly deposited thirty six surface sediments from river Mingoa, main tributary to the Municipal lake of Yaounde in Cameroon, were sampled to determine the degree, sources and distribution of metals contamination. The concentrations of trace elements were measured by ICP-AES for the samples collected at different stations in January 2005. Generally, the concentration of metals (Si) in the sediments reflected an anthropogenic inputs. The sediments were characterized by a high amount of organic matter (LOI) with a mean value of 12.44%. Enrichment Factors (EF) and Geoaccumulation Index (Igeo) were calculated and the relative contamination levels were assessed at these sites. With the exception of Ni, the enrichment of toxic metals was high. Descriptive statistics and multivariate analysis (principal factor method) were used to assist the interpretation of elemental data. This allowed the determination of the correlations between the metals and LOI variability in the sediments, and the identification of four main factors loadings controlling by parent rocks, anthropogenic input, organic compounds and weathering of silicate minerals.

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“…(Algan et al 2004;Al-Ghadban and El-Sammak 2005;Aloupi and Angelidis 2001;Aloupi and Angelidis 2002;Everrarts 1989;Everrarts and Fischer 1992;Frignani and Belluci 2004;Herut 1997;Herut and Halicz 2004;Jordanova et al 1999;Kiratli and Ergin 1996;Lakhan et al 2003;Langston et al 1999;Leivuori 1998;Leivuori and Niemisto 1995;Loring et al 1998;Pempkowiak et al 1999;Petronio et al 2000;Piani et al 2005;Ravanelli et al 1997;Ridgway et al 2003;Rivaro et al 2004;Sari and Catagay 2001;Savvides et al 1995;Secrieru and Secrieru 2002;Tkalin et al 1996;Topcuoglu et al 2002;Topcuoglu et al 2004;Trefry et al 2003;Vallius 1999). However, no previous studies have been conducted on surface sediments from the studied locations of the Algerian Mediterranean coasts.…”

mentioning

confidence: 83%

Determination of heavy metals (Cd, Cr, Cu, Fe, Ni, Pb, Zn) by ICP-OES and their speciation in Algerian Mediterranean Sea sediments after a five-stage sequential extraction procedure

Alomary

Belhadj

2007

Environ Monit Assess

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Surface sediment samples (n = 18) were collected from the Algerian Mediterranean coasts and analyzed for seven metals using inductively coupled plasma-optical emission spectrometry in order to asses the distribution and bioavailability of metals and to study the anthropogenic factors affecting their concentrations. Sediment samples were size-fractionated into three sizes: 1,080-500 (coarse), 500-250 (medium), and <250 mm (fine). Bulk sediments were subjected to both sequential extraction and total digestion to evaluate the reliability of the sequential extraction procedure (SEP), while the fractions have been only sequentially extracted for metals speciation. The metals were sequentially extracted into five phases namely exchangeable (P1), carbonates (P2), Fe-Mn oxides (P3), organic (P4) and residual (P5). Metal recoveries in sequential extractions were +/-20% of the independently measured total metal concentrations; the high recovery rates indicate the good reliability of the SEP used in this study. Correlation coefficients indicated that the grain size has an effect on the distribution of metals in the investigated samples. The order of metal levels in the fractions was medium > fine > coarse for all the metals. The average total extractable metal concentrations for Cd, Cr, Cu, Fe, Ni, Pb, and Zn were 1.1, 8.8, 4.7, 1,291.3, 13.9, 5.7 and 20.4 mug/g, respectively. The northeastern shelf had the lowest metal levels while the highest were in northwestern part mainly due to the significant tourism activities in the northwestern part. Comparison of our results to Earth's crust values and to previous studies points out that our samples were relatively unpolluted with respect to the heavy metals investigated; most of the metals are not from anthropogenic sources. Enrichment factors as the criteria for examining the impact of the anthropogenic sources of heavy metals were calculated, and it was observed that the investigated samples were not contaminated with Cr, Cu, and Fe, moderately contaminated with Ni, Pb, and Cd, and contaminated with Cd in some sites. The P5 phase had the highest percents of Cr, Cu, Fe, Ni, and Zn. Cadmium and lead were predominant in the P4 phase, while Cu, Fe and Zn were distributed in the order P5 > P3 > P4 > P2 > P1. The following order of bioavailability was found with the heavy metals Pb > Cr > Cd > Ni > Zn > Cu > Fe.

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Heavy Metal Distribution in Sediment Cores from Western Ross Sea (Antarctica)

Cited by 7 publications

References 16 publications

Nutrient Distribution in East Antarctic Summer Sea Ice: A Potential Iron Contribution From Glacial Basal Melt

Nutrient Distribution in East Antarctic Summer Sea Ice: A Potential Iron Contribution From Glacial Basal Melt

Metals pollution in freshly deposited sediments from river Mingoa, main tributary to the Municipal lake of Yaounde, Cameroon

Determination of heavy metals (Cd, Cr, Cu, Fe, Ni, Pb, Zn) by ICP-OES and their speciation in Algerian Mediterranean Sea sediments after a five-stage sequential extraction procedure

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