Measurement of environmental trace-metal levels in Mediterranean coastal areas with transplanted mussels and DGT techniques

Schintu, Marco; Durante, L; Maccioni, Anna Maria; Meloni, P; Degetto, S.; Contu, A.

doi:10.1016/j.marpolbul.2008.02.038

Cited by 83 publications

(72 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among the chemical and biological data, the concentration of contaminants in marine sediments is probably the most representative parameter to evaluate the effects of water renewal within the semi-enclosed areas as it gives a time-integrated measurement of chemical concentration over the whole exposure time, instead of an unrepresentative single measurement [9][10][11]. The enrichment degree of contaminants in sediments can be assessed using different contamination indices.…”

Section: Introductionmentioning

confidence: 99%

Water renewal time and trace metal concentration in civitavecchia port (rome), italy

Bonamano¹,

Piazzolla²,

Madonia³

et al. 2018

Int. J. EI

View full text Add to dashboard Cite

Most of the harbours can be considered as semi-enclosed areas where water stagnation leads to physical and chemical alterations due to anthropogenic activities. These features affect the quality of the port waters as well as the environmental health of coastal ecosystems in the surrounding areas. In order to understand the potential degradation of water quality within the harbour area it is essential to evaluate the hydrodynamic behaviour of the system. In this study, the DELFT3D-FLOW model, which allows to estimate the three-dimensional field velocity, was used to spatially characterize the water renewal time within the harbour. In particular, the flushing time (FT), which represents the time required for the total mass of a conservative tracer originally within the water body to be reduced to a factor 1/e, was examined. The concentration of contaminants in sediments is indeed a proper parameter to test the reliability of the calculated water renewal time within the semi-enclosed basins, since it relies on time-integrated measurements compared to single observations of water column. This research aims at studying the relation between the FT and the pollution due to trace metals in marine sediments. For this purpose, surface sediment samples were collected along a series of stations located in the innermost part and near the mouth of the Civitavecchia harbour. As, Cr, Hg, Ni, Cu, zn, Pb and Al concentrations were analysed to calculate the enrichment factor, which provides an estimate of the heavy metal contamination in the harbour surface sediment. The obtained results show a high correlation between the FT and the enrichment factor within the Civitavecchia port, confirming that water renewal can be used as an indicator of water quality degradation in semi-enclosed areas.

show abstract

Section: Introductionmentioning

confidence: 99%

Water renewal time and trace metal concentration in civitavecchia port (rome), italy

Bonamano¹,

Piazzolla²,

Madonia³

et al. 2018

Int. J. EI

View full text Add to dashboard Cite

show abstract

“…According to Water 2017, 9, 898 3 of 17 of the water column [33,35]. Therefore, to test the reliability of the residence time calculation within harbour basins, the concentration of contaminants in sediments is a more representative parameter with respect to a single measurement of the water column [36][37][38]. In this study, the enrichment factor (EF) [39,40] is proposed to describe the relation between the water recirculation time and the contamination level of heavy metals in the sediments.…”

Section: Introductionmentioning

confidence: 99%

Development of a Predictive Tool to Support Environmentally Sustainable Management in Port Basins

Bonamano

Madonia

Piazzolla

et al. 2017

Water

View full text Add to dashboard Cite

According to the Water Framework Directive, harbours that are classified as heavily modified water bodies must either reach or maintain good ecological potential. Moreover, following the marine spatial planning principles, the effects of port structure changes on water quality must also be considered. To support the sustainable management of harbour waters, we calculated flushing time (FT) through the use of a numerical model within the Civitavecchia port under different scenarios. To assess the effects of the realization of new infrastructure that will significantly alter the port configuration in the coming years, we also developed the flushing efficiency index (FEI). The increase in the harbour basin size due to the embankment extension result in high values of FT, particularly in the inner part of the port, in accordance with the highest values of the enrichment factor of the trace metals found in the sediment. The deterioration of water quality is confirmed by negative FEI values. Otherwise, the index assumes positive values after the realization of a second entrance in the southern part of Civitavecchia port, highlighting a drastic improvement in harbour water renewal. This study provides a low-cost and predictive tool to correctly address environmentally sustainable management of port activities.

show abstract

“…However, DGT devices have been shown to be more sensitive than mussels (Mytilus edulis) in detecting differences in metal concentrations between sites, indicating an advantage of DGT in studying the geographic distribution of contamination. 18 Previous studies have identified some inputs of trace metals to the Patos Lagoon estuary 17,19 from untreated urban and industrial waste water discharges present around the city of Rio Grande. The increase of the industrialization in the estuary area, together with the dynamic nature of the environment, makes it necessary to evaluate trace metals contaminations in some areas around the city.…”

Section: Introductionmentioning

confidence: 99%

In situ measurement of trace metals in estuarine waters of Patos Lagoon using diffusive gradients in thin films (DGT)

Wallner-Kersanach

Andrade

Zhang

et al. 2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

A técnica de gradiente difusivo de membrana (DGT) foi utilizada para determinar metais lábeis in situ durante diferentes condições hidrológicas no estuário da Lagoa dos Patos. As amostras de água foram também analisadas para a fração lábil-Chelex para Cd, Co, Cu, Mn, Ni e Zn usando resina Chelex-100. As concentrações lábeis-DGT de Cd, Cu, Ni e Zn foram mais baixas que a lábil-Chelex, possivelmente devido à ligação do metal coloidal na coluna de resina Chelex. Os resultados do DGT indicaram um decréscimo nas concentrações de todos os elementos, refletindo trocas na especiação dos metais em solução causada pela diminuição da salinidade e associado a mudanças de pH no estuário. Os resultados demonstraram a sensibilidade do DGT para a especiação dos metais e a capacidade do uso da técnica DGT em águas estuarinas altamente dinâmicas para a obtenção de concentrações de metais lábeis integradas ao longo do tempo.The diffusive gradients in thin-films (DGT) technique was used to determine labile metals in situ during different hydrological conditions in the Patos Lagoon estuary. Water samples were also analyzed for Chelex-labile fractions of Cd, Co, Cu, Mn, Ni and Zn using Chelex-100 resin. DGT-labile concentrations of Cd, Cu, Ni and Zn were lower than Chelex-labile concentrations, possibly because colloids were trapped in the Chelex resin column. There was a decrease with increasing deployment time in the concentrations of all elements measured by DGT, reflecting changes in metal speciation in solution caused by the decrease in the salinity and associated with change in pH in the estuary. The results demonstrated the sensitivity of DGT to metal speciation and the feasibility of using the DGT technique in highly dynamic estuarine waters to obtain a time-integrated record of labile trace metals. Keywords: DGT, labile metal, estuary IntroductionTrace metals are one of the major contaminants of estuarine and coastal areas, as a result of coastal development and, consequently, inputs from many anthropogenic sources. 1 Elements such as Cu, Ni, Mn and Zn play an important role as essential elements in aquatic systems. However, elevated concentrations of these elements, and of nonessential elements such as Cd, may cause toxicity for aquatic organisms. The investigation of metal bioavailability in water is as important as metal concentration when considering the impact of metals on an environment.The free metal ion (M 2+ ) and labile metal species in solution are the forms of dissolved metal often accumulated by aquatic organisms. 2 Uptake may occur directly into phytoplankton cells 3 or across gill membranes in fish. 4 So, speciation studies of trace metals have become important, as it enables evaluation of trace metal bioavailability and mobility. Available techniques include anodic stripping voltammetry, 5 cathodic stripping voltammetry 6 and ionexchange columns. 7 However, with standard equipment, all these methods require analyses to be done on a sample brought to the laboratory and metal speciation may change in this time ...

show abstract

Measurement of environmental trace-metal levels in Mediterranean coastal areas with transplanted mussels and DGT techniques

Cited by 83 publications

References 25 publications

Water renewal time and trace metal concentration in civitavecchia port (rome), italy

Water renewal time and trace metal concentration in civitavecchia port (rome), italy

Development of a Predictive Tool to Support Environmentally Sustainable Management in Port Basins

In situ measurement of trace metals in estuarine waters of Patos Lagoon using diffusive gradients in thin films (DGT)

Contact Info

Product

Resources

About