Mercury in the Aquatic Environment: A Review of Factors Affecting Methylation

Ullrich, Susanne M.; Tanton, T.W.; Abdrashitova, S.A.

doi:10.1080/20016491089226

Cited by 1,382 publications

(974 citation statements)

References 257 publications

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“…The MeHg contents in sediments account for normally 1% to 1.5% of HgT except for some lakes and wetlands where the percentage of MeHg can reach 10% (Gilmour et al, 1992;Ullrich et al, 2001). In Haihe River and Dagu Drainage River sediments, the MeHg concentrations ranged from 0.7 to 21.7 ng g À1 (dry weight) and the average value was 2.9 ng g À1 (dry weight).…”

Section: Total Mercury and Methylmercury In Sedimentsmentioning

confidence: 99%

“…Organic carbon plays an important role in the bioavailability and methylation of inorganic mercury, although its role has not been well understood (Andersson et al, 1990). Ullrich et al (2001) argued that, on the one hand, organic carbon can enhance methylation by stimulating the activity of heterotrophic microorganisms, or through direct abiotic The HgT concentrations (r=0.87, p=0.99, n=21; Fig. 5a) and MeHg concentrations (r=0.76, p=0.99, n=20; Fig.…”

Section: Total Mercury and Methylmercury In Sedimentsmentioning

confidence: 99%

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The speciation and bioavailability of mercury in sediments of Haihe River, China

Shi

Liang

Jiang

et al. 2005

Environment International

145

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Twenty-one sediment samples in 11 sites along the Haihe River and Dagu Drainage River, Tianjin, China, were analyzed to investigate the pollution status and bioavailability of mercury (Hg). The results showed that the Haihe River was slightly polluted with Hg when flowing through Tianjin city. On the contrary, the sediments collected from Dagu Drainage River, an important drainage river in Tianjin, were found to have very high Hg concentrations and the highest concentration reached 8779.1 ng g À1 (dry weight). The methylmercury (MeHg) concentrations accounted for 0.1-2.4% (average: 0.9%) of total mercury (HgT) and were strongly influenced by HgT (r=0.91, p=0.99, n=20) and total organic carbon (TOC; r=0.76, p=0.99, n=20) contents in sediments. Moreover, a five-step sequential selective extraction (SSE) procedure was used to study the bioavailability of Hg in sediments. The mercury in sediments existed mainly as element Hg and mercury sulfide, which accounted for 46.5% and 39.0% of HgT, respectively. The percentage of exchangeable Hg (defined as water soluble Hg plus dhuman stomach acidT soluble Hg) was only 0.1-4.6%. The distribution of exchangeable Hg showed an obvious difference to that of HgT, indicating that the HgT concentrations were absolutely insufficient to evaluate the risk of Hg in sediments. D

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Section: Total Mercury and Methylmercury In Sedimentsmentioning

confidence: 99%

Section: Total Mercury and Methylmercury In Sedimentsmentioning

confidence: 99%

The speciation and bioavailability of mercury in sediments of Haihe River, China

Shi

Liang

Jiang

et al. 2005

Environment International

145

View full text Add to dashboard Cite

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“…This sampling design allowed the assessment of the effect of plants on mercury speciation. August was the selected month due to known temperature dependency of bacterial activity; i.e., maximum bacterial activity is achieved with higher temperatures (Ullrich et al, 2001). Thus, the first 12 cm was chosen for the evaluation since the root system is more active in this region, and the oxic/anoxic interface has been recognised as the most important area for mercury methylation (Ullrich et al, 2001).…”

Section: N Aveiromentioning

confidence: 99%

Assessment of methylmercury production in a temperate salt marsh (Ria de Aveiro Lagoon, Portugal)

Válega

Lillebø

Pereira

et al. 2008

Marine Pollution Bulletin

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“…Upon entering aquatic systems, either by atmospheric deposition or from watershed-based sources, Hg is partly converted by micro-organisms into methylmercury (MeHg) (17) . MeHg is a contaminant of concern because of its strong tendency to bioaccumulate and biomagnify along the food chain (18) , with higher MeHg contents in large, long-lived predators (e.g.…”

Section: General Frameworkmentioning

confidence: 99%

Public health benefits and risks of fish consumption: current scientific evidence v. media coverage

Pasquarè

Bettinetti

Fumagalli

et al. 2012

Public Health Nutr.

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Objective: To evaluate if and how the current degree of scientific uncertainty about the safety of fish consumption is incorporated at the media level. Design: We used a dedicated software (TalTac R ) to investigate the content of 169 news articles related to 'mercury and fish consumption' that appeared from 1990 to 2010 in the two Italian broadsheets with the highest circulation figures, in order to identify journalistic frames used in the coverage of benefits v. risks associated with fish consumption. Hypotheses were made on how the public might change fish consumption patterns as a result of media coverage. Setting: Italy.

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Mercury in the Aquatic Environment: A Review of Factors Affecting Methylation

Cited by 1,382 publications

References 257 publications

The speciation and bioavailability of mercury in sediments of Haihe River, China

The speciation and bioavailability of mercury in sediments of Haihe River, China

Assessment of methylmercury production in a temperate salt marsh (Ria de Aveiro Lagoon, Portugal)

Public health benefits and risks of fish consumption: current scientific evidence v. media coverage

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