Trace metal distributions in shelf waters of the northwestern Black Sea

Tankéré, S.P.C.; Muller, François L. L.; Burton, J. D.; Statham, Peter J.; Guieu, Cécile; Martin, Jean‐Marie

doi:10.1016/s0278-4343(01)00013-9

Cited by 60 publications

(41 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zinc levels in this study are similar to values reported from the English Channel (Statham et al 1993), Southern North Sea (Millward et al 1998) and North Western Black Sea (Tankéré et al 2001), but still lower than those reported elsewhere (Paalman and Van der Weijden 1992;Price et al 1996). Overall, concentrations of heavy metals in the SPM are not elevated in Singapore compared to those recorded from the Rhine/Meuse estuary in the Netherlands (Paalman and Van der Weijden 1992) and the Northern Adriatic Sea (Price et al 1996), where the levels of Cd, Cu, Ni, Pb and Zn are significantly higher than the reported levels in this study.…”

Section: Particulate Heavy Metals In the Water Columnsupporting

confidence: 88%

“…Table 4 shows the concentration ranges of particulate metals in terms of SPM mass (μg g −1 ) in seawater samples from Singapore and other locations. Cadmium is comparable to available data reported for the Gulf and Western Arabian Sea (Fowler et al 1984), the Gironde estuary in Southwestern France (Kraepiel et al 1997) and Lake Balaton, the largest lake in Central Europe (Nguyen et al 2005) and substantially lower compared to levels elsewhere (Paalman and Van der Weijden 1992;Price et al 1996;Tankéré et al 2001). Copper and nickel are also lower than values reported for the Rhine/Meuse estuary in the Netherlands (Paalman and Van der Weijden 1992) and the Northern Adriatic Sea (Price et al 1996), but higher than results for the English Channel (Statham et al 1993) and Northern Adriatic Sea (Price et al 1996).…”

Section: Particulate Heavy Metals In the Water Columnsupporting

confidence: 78%

See 1 more Smart Citation

Distribution of heavy metals in the dissolved and suspended phase of the sea-surface microlayer, seawater column and in sediments of Singapore’s coastal environment

Cuong

Karuppiah

Obbard

2007

Environ Monit Assess

View full text Add to dashboard Cite

Concentrations of heavy metals were determined in the water column (including the sea-surface microlayer, subsurface, mid-depth and bottom water) and sediments from Singapore's coastal environment. The concentration ranges for As, Cd, Cr, Cu, Ni, Pb and Zn in the seawater dissolved phase (DP) were 0.34-2.04, 0.013-0.109, 0.07-0.35, 0.23-1.16, 0.28-0.78, 0.009-0.062 and 0.97-3.66 microg L(-1) respectively. The ranges for Cd, Cr, Cu, Ni, Pb and Zn in the suspended particulate matter (SPM) were 0.16-0.73, 6.72-53.93, 12.87-118.29, 4.34-60.71, 1.10-6.08 and 43.09-370.49 microg g(-1), respectively. Heavy metal concentrations in sediments ranged between 0.054-0.217, 37.48-50.52, 6.30-21.01, 13.27-26.59, 24.14-37.28 and 48.20-62.36 microg g(-1) for Cd, Cr, Cu, Ni, Pb and Zn, respectively. The lowest concentrations of metals in the DP and SPM were most frequently found in the subsurface water while the highest concentrations were mostly observed in the SML and bottom water. Overall, heavy metals in both the dissolved and particulate fractions have depth profiles that show a decreasing trend of concentrations from the subsurface to the bottom water, indicating that the prevalence of metals is linked to the marine biological cycle. In comparison to data from Greece, Malaysia and USA, the levels of metals in the DP are considered to be low in Singapore. Higher concentrations of particulate metals were reported for the Northern Adriatic Sea and the Rhine/Meuse estuary in the Netherlands compared to values reported in this study. The marine sediments in Singapore are not heavily contaminated when compared to metal levels in marine sediments from other countries such as Thailand, Japan, Korea, Spain and China.

show abstract

Section: Particulate Heavy Metals In the Water Columnsupporting

confidence: 88%

Section: Particulate Heavy Metals In the Water Columnsupporting

confidence: 78%

Distribution of heavy metals in the dissolved and suspended phase of the sea-surface microlayer, seawater column and in sediments of Singapore’s coastal environment

Cuong

Karuppiah

Obbard

2007

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…On the basis of the data available from the literature, it is customary to believe that the concentrations of biogenic elements over the thermocline in the spring-summer period should be relatively low due to their biochemical consumption, whereas under the thermocline, these concentrations increase due to the regeneration of the settling biomass [18,19]. Thus, the seasonal thermocline plays the role of a density barrier restricting the process of exchange between the upper mixed layer and deeper layers of water.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Specific features of the vertical distribution of elements of the main biogenic cycles in waters of the Northwest shelf of the Black Sea

Кондратьев

2009

Phys Oceanogr

View full text Add to dashboard Cite

551.465We study specific features of the vertical distribution of elements of the main biogenic cycle in the upper layers of waters on the northwest shelf of the Black Sea in spring and autumn and the correlation between the specific features of the vertical distributions of hydrochemical and hydrological characteristics. It is shown that the location of the halocline always specifies the location of the chemocline, whereas the effect of the thermocline on the distribution of hydrochemical characteristics is ambiguous. The vertical distribution of the hydrochemical parameters can be homogeneous in the presence of the seasonal thermocline. At the same time, in its absence, one may observe significant vertical gradients in the distributions of hydrochemical characteristics inside the upper mixed layer.In analyzing the vertical distributions of elements of the main biogenic cycle in the upper layers of the Black Sea, main attention of the researchers is traditionally focused on the behavior of concentrations in the course of transformation of the aerobic zone into the anaerobic zone. A detailed description of the biochemical processes running in this case between the isopycnic surfaces with σ t = 14.2 and σ t = 16.5 can be found in [1][2][3][4][5][6].Much less attention is given to the specific features of the vertical distribution of biogenic elements in shelf waters, although the problem of expected changes in the concentrations of biogenic elements in the course of motion from the surface to the cold intermediate layer is actually of the same level of complexity as the analysis of specific features of the vertical distributions of hydrochemical characteristics in the suboxic and hydrogensulfide zones. The field studies carried out in the shelf zone are, as a rule, restricted to taking samples on the surface and in the bottom layer.. However, by using this methodical approach, it is impossible to study specific features of the vertical distribution of stratified shelf waters containing the upper mixed layer (UML), the layer of seasonal thermocline, the upper boundary of the cold intermediate layer with σ t = 14.1-14.3, and the core of the cold intermediate layer with σ t = 14.5-14.6. The specific features of the vertical distributions of elements of the main biogenic cycle under the isopycnic surface σ t = 15.0 on the northwest shelf (NWS) in May 2004 and May 2007 are studied in [7,8].In the present work, we study the distributions of biogenic elements in the spring and autumn seasons in the upper 100-m layer of waters with high vertical resolution in the regions of the northwest shelf not subjected to the influence of river discharge and analyze the correlations between the specific features of the distributions of chemical and hydrological characteristics. Materials and MethodsFor the analysis of the vertical profiles of concentrations of biogenic elements, we use the data of three expeditions of the Marine Hydrophysical Institute of the Ukrainian Academy of Sciences for the last twelve years.Marine Hydrophysica...

show abstract

“…Dissolved Cu did not show any depletion in the surface waters. This could be due to strong organic complexation which would reduce the inorganic free Cu 2+ pool that is directly available for biological uptake [19]. Vertical distributions of Pb indicated relatively lower concentrations in the surface layer with increases at the deeper layer, suggesting scavenging of Pb from solution onto particles and less efficient atmospheric input in this study area [19].…”

Section: Methodsmentioning

confidence: 91%