Mercury contamination in Marano Lagoon (Northern Adriatic sea, Italy): Source identification by analyses of Hg phases

Piani, Raffaella; Covelli, Stefano; Biester, Harald

doi:10.1016/j.apgeochem.2005.04.003

Cited by 69 publications

(16 citation statements)

References 31 publications

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“…In fact, the fluvial environment has been affected by the activity of a chlor-alkali plant (CAP) used for the production of pulp, which was in operation until 1992 (Covelli et al, 2009). Although the levels of Hg tot and methyl-Hg (CH 3 Hg) in riverine sediments (mean value of 2.96 µg/g and 2.95 ng/g, respectively) collected for the MIRACLE Project were lower than those determined by Covelli et al (2009) (Hg tot mean value of 3.19 µg/g), regular and persistent contamination of Hg still exists in the area related to fine particles transported by freshwater to the Marano Lagoon (Piani et al, 2005).…”

Section: Ammonia Tepida Assemblage (Clustermentioning

confidence: 94%

“…The Lagoon has historically been affected by high levels of Hg accumulation, originating from both natural and anthropogenic sources (Piani et al, 2005;Covelli et al, 2009;Covelli, 2012). For this reason, the regional agency for environmental protection (ARPA, FVG) and the University of Trieste have been involved in monitoring this lagoon by means of several bioindicators (including the edible mollusc Tapes philippinarum) and chemical-physical parameters during the last years.…”

Section: Study Areamentioning

confidence: 99%

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Distribution and morphological abnormalities of recent foraminifera in the Marano and Grado Lagoon (North Adriatic Sea, Italy)

Melis¹,

Covelli²

2013

Medit. Mar. Sci.

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The Marano and Grado Lagoon, is a northern Adriatic wetland system of relevant naturalistic and economic value that is constantly under quality control in accordance with the current environmental directives. The benthic foraminifer community with its morphological abnormalities was investigated in the recent sediments (about 10 years old) of 21 stations; the samples were collected within the framework of the "MIRACLE" Project, which aimed at testing the coexistence of clam farming with high Hg contamination. Euryhaline foraminifers, well known in Mediterranean brackish-waters, mainly characterize the total assemblage. Ammonia tepida dominates in areas characterized by low salinity, high clay and organic carbon content, but is also subjected to anthropogenic pressure. Elphidium gunteri and Haynesina germanica are recorded in the western sector of the lagoon, which is more affected by salinity variations and agricultural activities. Slightly higher values of assemblage diversity appear in less restricted areas of the lagoon or, at least, where physical parameters such as temperature and salinity are less variable. The test abnormalities, carried out on total assemblage, show that the FAI (Foraminiferal Abnormality Index) values always exceed 1% of the total assemblage, with clear decreasing gradients from inland to the sea (from N to S) and from W to E in the studied area.

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Section: Ammonia Tepida Assemblage (Clustermentioning

confidence: 94%

Section: Study Areamentioning

confidence: 99%

Distribution and morphological abnormalities of recent foraminifera in the Marano and Grado Lagoon (North Adriatic Sea, Italy)

Melis¹,

Covelli²

2013

Medit. Mar. Sci.

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“…Ausa-Corno River system in connection with the lagoon (Piani et al, 2005). In 1984, due to application of law rules, a modern wastewater system treatment was installed; hence no more inputs of Hg should have been released into the environment.…”

Section: Manila Clam (Tapes Philippinarum Adams and Reeve 1852) In Thementioning

confidence: 99%

“…The silty fraction (62.5-3.9 µm) normally comprises a higher percentage than the clay fraction (<3.9 µm) in the pelitic component. Generally, the ratio fine-silt/clay (2-16/<2 µm) identifies areas affected by freshwater inputs into the lagoon: a high ratio indicates an area of fresh water input and vice versa (Piani & Covelli, 2000;Piani et al, 2005).…”

mentioning

confidence: 99%

Manila Clam (Tapes philippinarum Adams & Reeve, 1852) in the Lagoon of Marano and Grado (Northern Adriatic Sea, Italy): Socio-Economic and Environmental Pathway of a Shell Farm

Sladonja¹,

Bettoso²,

Zentilin³

et al. 2011

Aquaculture and the Environment - A Shared Destiny

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“…[4][5][6] Sediment constituents potentially involved in binding Hg, and consequently in its burial efficiency within sediments, include Fe and Mn oxyhydroxides, organic matter and metal sulfides, [7][8][9] besides the possible importance of grain size in determining the Hg adsorption capacity of sediments. [10][11] Moreover, in evaluating the biogeochemical controls on Hg distribution in sediments it is important to note that upper sediment layers may develop vertical and lateral stratifications in the predominant physicochemical conditions that affect redox-sensitive Hg-binding phases. 1,3,12 Therefore, the contribution of a given solid phase for the Hg retention by estuarine sediments may vary in space and time, particularly where anthropogenic disturbances are shifting the overlaying water quality, as might be expected with the increasing input of urban and industrial effluents.…”

Section: Introductionmentioning

confidence: 99%

Mercury accumulation in sediments along an eutrophication gradient in Guanabara Bay, southeast Brazil

Machado

Santelli

Loureiro

et al. 2008

J. Braz. Chem. Soc.

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A acumulação de Hg foi investigada em testemunhos sedimentares da Baía de Guanabara, Rio de Janeiro, Brasil, amostrados ao longo de um gradiente de eutrofização, que se refletiu na qualidade física dos sedimentos e na distribuição de carbono orgânico total (COT). Sedimentos da área oeste da baía foram fortemente afetados por aportes de efluentes domésticos e industriais, apresentando concentrações de Hg de até 7500 ng g -1 e inventários de Hg de até 786 mg m ). Uma mudança de uma relação negativa para uma positiva entre Hg e COT ocorreu no estuário mais eutrofizado, no qual um aumento nos níveis de Hg no sentido do topo foi observado. Este aumento pode ser atribuído a (i) um crescente aporte fluvial de Hg e (ii) um impacto da eutrofização sobre a qualidade dos sedimentos, que pode aumentar a sua capacidade de acumular Hg associado à matéria orgânica.The accumulation of Hg was investigated in sediment cores from Guanabara Bay, Rio de Janeiro, Brazil, sampled along an eutrophication gradient, which was reflected in the sediment physical quality and total organic carbon (TOC) distribution. Sediments from the western bay ). A shift from a negative to a positive relationship between Hg and TOC occurred in the most eutrophicated estuary, in which an upward increase in the recorded Hg levels was observed. This increase may be attributed to (i) an increasing riverine Hg input and (ii) an impact of eutrophication on the sediment quality, which may enhance the sediment capacity to accumulate organic matter-bound Hg.

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Mercury contamination in Marano Lagoon (Northern Adriatic sea, Italy): Source identification by analyses of Hg phases

Cited by 69 publications

References 31 publications

Distribution and morphological abnormalities of recent foraminifera in the Marano and Grado Lagoon (North Adriatic Sea, Italy)

Distribution and morphological abnormalities of recent foraminifera in the Marano and Grado Lagoon (North Adriatic Sea, Italy)

Manila Clam (Tapes philippinarum Adams & Reeve, 1852) in the Lagoon of Marano and Grado (Northern Adriatic Sea, Italy): Socio-Economic and Environmental Pathway of a Shell Farm

Mercury accumulation in sediments along an eutrophication gradient in Guanabara Bay, southeast Brazil

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