Historical records of mercury deposition in dated sediment cores reveal the impacts of the legacy and present-day human activities in Todos os Santos Bay, Northeast Brazil

Hatje, Vanessa; Jesus, Robson M. de; Masqué, Pere; Albergaria-Barbosa, Ana Cecília Rizzatti de; Andrade, Jaílson Bittencourt de; Santos, Ana C S S

doi:10.1016/j.marpolbul.2019.06.041

Cited by 29 publications

(5 citation statements)

References 60 publications

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“…The high T-Hg accumulated in carnivore demersal fish and cephalopods in this study is possibly influenced by the food habit and habitat in the food chain. A study investigated that demersal fish are more likely exposed to Hg, compared to pelagic fish, due to the close association with a relatively higher T-Hg level in sediments [41]. Additionally, fish species, trophic level, habitat, body size and age [4,42] are also possibly influenced high levels in carnivore demersal fish within this study.…”

Section: ) Total Mercury (T-hg) Levels Across Food Habit and Habitatmentioning

confidence: 84%

Risk Assessment of Total Mercury (T-Hg) in Commercial Seafood Marketed in Bangkok, Thailand

2022

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Seafood is recognized as the high protein source of human consumption. However, it is hampered by mercury contamination. The objectives of this study are to determine total mercury (T-Hg) levels in edible portions of commercial seafood available in Bangkok’s supermarkets, and to evaluate the potential risks from mercury through seafood consumption. Total 32 species, including 22 fish, 4 cephalopod and 6 shellfish, were purchased from super-markets. Fish samples were dissected in 3 parts comprised of flesh, gill and viscera. While, cephalopod and shellfish were separated for edible tissues. The samples were digested in hot acid and were determined using cold-vapor atomic absorption spectrometry technique. The results revealed that T-Hg contained in the fish flesh > cephalopod > shellfish. In addition, T-Hg was accumulated in flesh > viscera > gill. Statistical analysis suggested that T-Hg accumulated in flesh was related positively with species, feeding habit, and habitat (p < 0.05). For risk analysis, estimated daily intake (EDI) of flesh ranged from 0.01 to 0.42 µg kg-1 bodyweight d-1, the lowest and highest EDI values were in salmon and yellowfin tuna, res-pectively. Yellowfin tuna, narrow-barred Spanish mackerel, fourfinger threadfin, and silver sillago were the 4 species that having the EDI values of T-Hg higher than the FAO/WHO recommended provisional tolerable daily intake (PTDI) of 0.23 µg kg-1 bodyweight d-1. Thus, the frequent consumption of these seafood are not recommended. In addition, the daily consumption of seafood should not exceed the maximum safe daily intake (MSDC). The MSDC of seafood in this study ranged from 15.5 (yellowfin tuna) to 474 (salmon) g d-1.

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Section: ) Total Mercury (T-hg) Levels Across Food Habit and Habitatmentioning

confidence: 84%

Risk Assessment of Total Mercury (T-Hg) in Commercial Seafood Marketed in Bangkok, Thailand

2022

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“…The anthropogenic activities over the years have been introducing PFAAS , and Hg, among other contaminants, ,, to the Subaé estuary. Despite the high anthropogenic pressures in the region, no indication of anthropogenic REE anomalies have been identified, demonstrating that the natural levels observed in biotic and abiotic compartments can be used as baselines for future studies.…”

Section: Resultsmentioning

confidence: 99%

Fate and Trophic Transfer of Rare Earth Elements in a Tropical Estuarine Food Web

Santos

Souza

Araujo

et al. 2023

Environ. Sci. Technol.

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We sampled abiotic and food web components in an impacted estuarine system to assess the transfer and fate of rare earth elements (REE). REE (based on dry weight) were measured in sediments, suspended particulate matter (SPM), and organisms from different trophic levels. The highest ∑REE concentrations were measured in sediments (180 ± 4.24 mg kg −1 ) and SPM (163 ± 12.6 mg kg −1 ). Phytoplankton (45.7 ± 5.31 mg kg −1 ), periphyton (51.6 ± 1.81 mg kg −1 ), and zooplankton (68.5 ± 1.27 mg kg −1 ) are the major sources of exposure and transfer of REE to the food web. REE concentrations were several orders of magnitude lower in bivalves, crustaceans, and fish (6.01 ± 0.11, 1.22 ± 0.18, and 0.059 ± 0.003 mg kg −1 , respectively) than in plankton. The ∑REE declined as a function of the trophic position, as determined by functional feeding groups and δ 15 N, indicating that REE were subject to trophic dilution. Our study suggests that the consumption of seafood is unlikely to be an important source of REE for humans. However, given the numerous sources of dietary introduction of REE, they should be monitored for a possible harmful cumulative effect. This study provides new key information on REE's baseline concentrations and trophic transfers and patterns.

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“…With the global need for energy growing, extensive hydroelectricity expansion is currently underway 4 . Construction of reservoirs and dams is, however, associated with substantial environmental costs, such as biodiversity loss 5,6 , fish migration 5 , increased emissions of greenhouse gases 7,8 , and the potential for increased contaminant exposure, including exposure to mercury (Hg) [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Insights into the factors influencing mercury concentrations in tropical reservoir sediments

Baptista-Salazar

Quadra

Sobek

et al. 2021

Environ. Sci.: Processes Impacts

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Historical records of mercury deposition in dated sediment cores reveal the impacts of the legacy and present-day human activities in Todos os Santos Bay, Northeast Brazil

Cited by 29 publications

References 60 publications

Risk Assessment of Total Mercury (T-Hg) in Commercial Seafood Marketed in Bangkok, Thailand

Risk Assessment of Total Mercury (T-Hg) in Commercial Seafood Marketed in Bangkok, Thailand

Fate and Trophic Transfer of Rare Earth Elements in a Tropical Estuarine Food Web

Insights into the factors influencing mercury concentrations in tropical reservoir sediments

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