One century sedimentary record of Hg and Pb pollution in the Sagua estuary (Cuba) derived from 210Pb and 137Cs chronology

Díaz-Asencio, Misael; Alonso-Hernández, Carlos; Bolaños-Álvarez, Yoelvis; Gómez-Batista, Miguel; Pinto, Valentina; Morabito, Roberto; Hernández-Albernas, J.I.; Eriksson, Mats; Sanchez-Cabeza, Joan-Albert

doi:10.1016/j.marpolbul.2009.02.010

Cited by 70 publications

(40 citation statements)

References 27 publications

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“…Gonzalez (1991) found that the area was polluted with mercury a few years after the beginning of plant operation. Dı´az-Asencio et al (2009) also reported a significant enrichment of mercury in the estuary sediment in recent years, reaching a maximum level of 2.68 mg.g x1 around 1990. Moreover, Olivares-Rieumont et al (2012) found levels of mercury ranging from 0.190 to 0.690 mg.g x1 dry weigh (dw) in oyster tissues (Crassostrea rizophorae) collected at the Sagua la Grande River estuary and offshore mangrove keys 19 km downstream of CAP.…”

Section: Introductionmentioning

confidence: 87%

Levels of arsenic, mercury and selenium inClarias gariepinusfrom Sagua la Grande River, Cuba

Lima

López-Heras

Pedrero

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-This study first reports concentrations of arsenic (As) and selenium (Se) in fish tissue of Clarias gariepinus from Sagua la Grande River in the Villa Clara Province, Cuba. We also confirm the mercury (Hg) levels in these fish obtained previously. Individuals were captured in three areas near Sagua la Grande City, where this fish is a common source of food for the city inhabitants. Concentrations range of As, Hg and Se (in wet weight) were 0.01-0.11 mg.g x1 ; 0.03-0.24 mg.g x1 and 0.75-3.87 mg.g x1 , respectively. As and Se levels were positively correlated (n = 19, r = 0.673, P < 0.05). High levels of Se were found in fish tissue and in 31.6% (n = 6) of individuals captured exceeded the threshold value for Se toxicity, which means that Se is likely to produce adverse consequences on the fish themselves or on the wildlife organisms that eat them. As and Se concentrations were positively correlated with fish weight and length (P < 0.05). Fish from irrigation canal have higher Se concentrations than fish captured in the other two stations. However, no significant differences were found between Hg and As concentrations in fish at the three sampling stations. Finally, as the Se concentrations in C. gariepinus were abnormally high, we suggest the need for studies about Se sources in the zone, the effect of Se in fish and the intake associated with fish consumption.

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Section: Introductionmentioning

confidence: 87%

Levels of arsenic, mercury and selenium inClarias gariepinusfrom Sagua la Grande River, Cuba

Lima

López-Heras

Pedrero

et al. 2013

Ann. Limnol. - Int. J. Lim.

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show abstract

“…Thus, sedimentation provides a means of pollutant transport to and subsequent accumulation in bottom sediments. In depositional environments, the continuous deposition of sediments without an interruption in the sedimentary sequence can serve as an archive of environmental changes (Kannan et al, 2005;Giuliani et al, 2008;Giuliani et al, 2015) and dating of sediment cores can provide a historical record of SARs and pollution events (Giuliani et al, 2008;Díaz-Asencio et al, 2009;.…”

Section: Sedimentation In Harboursmentioning

confidence: 99%

“…The 210 Pb radioisotope, based on its short half-life of 22.3 years, is particularly suitable for chronological assessment and quantification of recent sedimentation rates on time-scales spanning the past 100-150 years Appleby, 2008;Díaz-Asencio et al, 2009). Alpha spectrometry and low background gamma spectrometry are the most common methods of analysing the specific activity of 210 Pb in sediments (Sikorski and Bluszcz, 2008;de Vleeschouwer et al, 2010;Mabit et al, 2014) with comparable results (Zaborska et al, 2007;Sikorski and Bluszcz, 2008).…”

Section: Pb As a Tool For The Quantification Of Sarsmentioning

confidence: 99%

“…The CF-CS model applies under the following assumptions: (1) a constant flux of 210 Pb exc from the atmosphere and a constant dry-mass sedimentation rate Díaz-Asencio et al, 2009) and (2) no post-depositional sediment mixing with every sediment layer having the…”

Section: The Constant Flux Constant Sedimentation (Cf-cs) Modelmentioning

confidence: 99%

“…The short-lived 137 Cs isotope (T 1/2 = 30.1 y) has been commonly used to validate 210 Pb dates of sediment cores Appleby, 2002;Pfitzner et al, 2004;AlonsoHernandez et al, 2006;McDonald and Urban, 2007;Díaz-Asencio et al, 2009;, which can be measured directly by gamma spectrometry Díaz-Asencio et al, 2009;Smith et al, 2009 Cs peaks in sediments correspond to these periods (Abril and Garcia-Le6n, 1994;Di Leonardo et al, 2007;Erten, 2011) and serve as a validating tool in 210 Pb dating of sediments Gunten et al, 2009). …”

Section: Pb Dating Modelsmentioning

confidence: 99%

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Mercury Levels in Sediments and Mangrove Oysters, Crassostrea rizophorae, from the North Coast of Villa Clara, Cuba

Olivares-Rieumont

Lima

Rivero³

et al. 2012

Bull Environ Contam Toxicol

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Total mercury levels were quantified in sediments and oyster tissues (Crassostrea rizophorae) from the Sagua la Grande River estuary and offshore mangrove keys 19 km downstream of a chlor-alkali plant (CAP) in Villa Clara, Cuba. Relatively elevated total mercury levels were found in sediments from the estuary itself, ranging from 0.507 to 1.81 μg g(-1) dry weight. However, levels were lower in sediments from the keys farther from the estuary. Oyster mercury levels were always acceptable for human consumption, although levels significantly correlated in sediments and oysters across sampling sites (p < 0.05), which suggests that mercury from the CAP is impacting coastal water quality conditions.

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One century sedimentary record of Hg and Pb pollution in the Sagua estuary (Cuba) derived from 210Pb and 137Cs chronology

Cited by 70 publications

References 27 publications

Levels of arsenic, mercury and selenium inClarias gariepinusfrom Sagua la Grande River, Cuba

Levels of arsenic, mercury and selenium inClarias gariepinusfrom Sagua la Grande River, Cuba

Sediments in the Tema Harbour (Ghana): chemical pollution and sedimentation rates

Mercury Levels in Sediments and Mangrove Oysters, Crassostrea rizophorae, from the North Coast of Villa Clara, Cuba

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