Macroalgae and DGT as indicators of available trace metals in marine coastal waters near a lead–zinc smelter

Schintu, Marco; Marras, Barbara; Durante, L; Meloni, P; Contu, A.

doi:10.1007/s10661-009-1081-8

Cited by 52 publications

(23 citation statements)

References 38 publications

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“…By contrast, concentrations up to 39.7 ± 1.5 lgPbg À1 were found in E. thouarsii, suggesting that either this species is exposed to a specific source of Pb from crustose (Lithophyllum)o r articulated (Amphiroa) coralline algae and/or other organisms (mollusks, barnacles, filamentous, or turfforming algae) attached to the macroalgae or rocks (Reyes-Bonilla and Caldero´n-Aguilera 1999). Previously, we measured a concentration of Pb of 32.5 lgg À1 in Amphiroa beauvoisii collected in winter 2011 at El Sauzoso (unpublished data); this amount, along with up to 9.7 lgP bg À1 in A. rigida near a lead-zinc smelter (Schintu et al 2010) indicates that these algae, containing calcified cell walls, can trap Pb (Davis et al 2003). This suggests a route of exposure for E. thouarsii to appreciable concentrations of Pb through its diet.…”

Section: Metalsmentioning

confidence: 80%

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Hernández-Almaraz

Méndez-Rodríguez

Zenteno‐Savín

et al. 2016

Ecological Research

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The aim of the study was to evaluate the dynamic of cadmium, lead, copper, zinc, and iron among lower trophic levels, sea urchins and macroalgae. Diets and isotopic values were used in combination to explore trophic positions and potential transference of metals from primary producers to consumers. Concentrations of trace elements were measured in two species of sea urchin (Tripneustes depressus and Eucidaris thouarsii) and nine macroalgae that are usually used as food in four Sargassum beds, one of which is close to a phosphorite mine. Specimens were collected when Sargassum fronds were at their greatest (winter) and lowest (summer) abundance. Highest concentrations of Cd, and Cu in both urchin species were recorded in winter at the site near the phosphorite mine. Concentrations of Pb in T. depressus were below the detectable limit, whereas E. thouarsii, which in addition to a high concentration of Pb, had high amounts of Cu and Zn. Gut content analysis, indicates that the diet of both sea urchins at the four sites and two collection dates is mainly macroalgae. The δ15N isotopic values in sea urchins in a typical Sargassum bed were in good agreement with a diet dominated by macroalgae, with T. depressus having herbivorous habits and E. thouarsii having omnivorous habits in this environment. We found macroalgae important in the dynamics of metals in food webs, potentially contributing to transferring Cd, Cu, and Zn to key invertebrate species, such as sea urchins, indicating connectivity of food webs and ecological structuring of marine environments.

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Section: Metalsmentioning

confidence: 80%

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Hernández-Almaraz

Méndez-Rodríguez

Zenteno‐Savín

et al. 2016

Ecological Research

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“…Diffusive gradients in thin films (DGT) is now an established technique that is used in different fields of research, including water quality monitoring, [1,2] chemical speciation in solution, [3,4] sediment geochemistry, [5,6] dynamic processes in waters [7][8][9] and soils [10,11] and bioavailability in waters [12,13] and soils. [14,15] By using different binding agents the range of determinands has been extended from trace metals [16] to include other cations, [17,18] oxyanions [19,20] and targeted species, for example sulfide, [21] uranium, [22] radium [23] and technetium.…”

Section: Introductionmentioning

confidence: 99%

Progress in understanding the use of diffusive gradients in thin films (DGT) – back to basics

2012

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Environmental context. It is now nearly 20 years since the introduction of the technique of diffusive gradients in thin films, which can provide information on solute concentrations and dynamics in sediments, soils and water. The interpretation of these measurements in terms of concentrations relies on simple equations and associated assumptions. This review examines how well they have stood the test of time.Abstract. Diffusive gradients in thin films (DGT) is now widely used to measure a range of determinands in waters, soils and sediments. In most cases the mass accumulated is interpreted in terms of a labile form of the component being measured using a simple equation that applies to steady-state conditions. During the past decade several publications have revealed phenomena that question some of the assumptions necessary for use of the simple equation. This review systematically examines the available evidence relating to appropriate geometry, possible charge effects, binding of solutes and ligands to the diffusive gel and filter, the rate of reaction with the binding layer, the effects of solution complexation and kinetic limitation, necessary time for deployment and the measurement of nanoparticles. DGT emerges as a robust monitoring tool for labile components in solution. Although there is evidence, for some conditions, of binding of metals and, more moderately, humic substances to the diffusive gel and filter membrane, this is unlikely to affect DGT measurement in natural waters for deployment times exceeding a few days. Detailed speciation and kinetic studies require a more thorough interpretation of the mass accumulated by DGT. A coherent theory has emerged for relatively simple solutions, but systems with complex heterogeneous ligands, as is the case for natural waters, are challenging. The size discrimination of DGT is still poorly known. Systematic measurements with well characterised nanoparticles are required to define the distribution of pore sizes in the gels and to establish the contribution of natural colloids to the DGT measurement.

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“…The studies carried out with the use of sea and fresh water algae confirm their practical application not only in biomonitoring of surface waters pollution [9][10][11][12][13][14][15][16] but also waters phytoremediation [17] and as biosorbents in the effluent treatment process [18].…”

Section: Introductionmentioning

confidence: 73%

Application of algae in active biomonitoring of the selected holding reservoirs in swietokrzyskie province

Rajfur

Krems

Kłos

et al. 2016

Ecological Chemistry and Engineering S

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During the years 2014-2015, biomonitoring studies were carried out at three holding reservoirs located in Swietokrzyskie Province (central Poland): Kielce artificial lake, Chancza reservoir and Sielpia reservoir. In sea water algae Palmaria palmata (Linnaeus) Weber & Mohr, exposed in the analysed waters, the increases of concentrations were determined by the atomic absorption spectrometry method (AAS), of the following: Mn, Fe, Cu, Zn, Cd and Pb. Conductivity and pH were also determined in the reservoirs waters. The differences between the increases of heavy metal concentrations in the samples of algae found along the coastline were indicated; they result from different distances from the pollution sources, such as resorts, communication routes and industrial plants.

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Macroalgae and DGT as indicators of available trace metals in marine coastal waters near a lead–zinc smelter

Cited by 52 publications

References 38 publications

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Progress in understanding the use of diffusive gradients in thin films (DGT) – back to basics

Application of algae in active biomonitoring of the selected holding reservoirs in swietokrzyskie province

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