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Mellingen RM, Rasinger JD, Nøstbakken OJ, Myrmel LS, Bernhard A. Dietary protein affects tissue accumulation of mercury and induces hepatic Phase I and Phase II enzyme expression after co-exposure with methylmercury in mice. J Nutr Biochem 2024; 133:109712. [PMID: 39094928 DOI: 10.1016/j.jnutbio.2024.109712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 05/31/2024] [Accepted: 07/26/2024] [Indexed: 08/04/2024]
Abstract
Methylmercury (MeHg) is a ubiquitous environmental contaminant, well known for its neurotoxic effects. MeHg can interact with several nutrients in the diet and affect nutrient metabolism, however the interaction between MeHg and dietary proteins has not been thoroughly investigated. Male BALB/c mice were fed diets based on either casein, cod or chicken as protein sources, which were or were not spiked with MeHg (3.5 mg Hg kg-1). Following 13 weeks of dietary exposure to MeHg, the animals accumulated mercury in a varying degree depending on the diet, where the levels of mercury were highest in the mice fed casein and MeHg, lower in mice fed cod and MeHg, and lowest in mice fed chicken and MeHg in all tissues assessed. Assessment of gut microbiota revealed differences in microbiota composition based on the different protein sources. However, the introduction of MeHg eliminated this difference. Proteomic profiling of liver tissue uncovered the influence of the dietary protein sources on a range of enzymes related to Phase I and Phase II detoxification mechanisms, suggesting an impact of the diet on MeHg metabolism and excretion. Also, enzymes linked to pathways including methionine and glycine betaine cycling, which in turn impact the production of glutathione, an important MeHg conjugation molecule, were up-regulated in mice fed chicken as dietary protein. Our findings indicate that dietary proteins can affect expression of hepatic enzymes that potentially influence MeHg metabolism and excretion, highlighting the relevance of considering the dietary composition in risk assessment of MeHg through dietary exposure.
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Affiliation(s)
- Ragnhild Marie Mellingen
- Department of Seafood, Nutrition and Environmental State, Institute of Marine Research, Bergen, Norway; Department of Biomedicine, University of Bergen, Norway
| | - Josef Daniel Rasinger
- Department of Seafood, Nutrition and Environmental State, Institute of Marine Research, Bergen, Norway
| | - Ole Jakob Nøstbakken
- Department of Seafood, Nutrition and Environmental State, Institute of Marine Research, Bergen, Norway
| | - Lene Secher Myrmel
- Department of Seafood, Nutrition and Environmental State, Institute of Marine Research, Bergen, Norway
| | - Annette Bernhard
- Department of Seafood, Nutrition and Environmental State, Institute of Marine Research, Bergen, Norway.
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2
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Philibert A, Tousignant B, Fillion M, Da Silva J, Mergler D. Characterizing visual field loss from past mercury exposure in an Indigenous riverine community (Grassy Narrows First Nation, Canada): a cluster-based approach. Environ Health 2024; 23:81. [PMID: 39375679 PMCID: PMC11457346 DOI: 10.1186/s12940-024-01119-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2024] [Accepted: 09/23/2024] [Indexed: 10/09/2024]
Abstract
BACKGROUND Between 1962 and 1975, a chlor-alkali plant in Canada discharged approximately 9 metric tons of mercury (Hg) into the Wabigoon River. Over the following decades, biomarkers of Hg exposure of persons from Grassy Narrows First Nation (Asubpeeschoseewagong Anishinabek), located downriver from the discharge, reflected Hg concentrations in fish. Hg exposure is known to target the calcarine fissure, resulting in visual field (VF) loss. Most studies and clinical reports focus solely on peripheral VF loss; little is known about the impact of Hg on the central and paracentral portions. The present study sought to characterize the patterns of VF loss with respect to past and current Hg. METHODS A 28-year hair-Hg (HHg) database, created from a 1970-97 government biomonitoring program, served to select study participants with ≥ 4 year-based HHg measurements (n = 81). Blood-Hg was assessed for current exposure. Light sensitivity thresholds across the VF were analyzed monocularly, using a Humphrey Field Analyzer (HFA). Following post-hoc exclusions, based on HFA interpretation indices, 65 participants were retained. Both eyes were combined for analyses (n = 130 eyes). Unsupervised hierarchical clustering of HFA plot data was used to identify patterns of VF loss. A series of mixed effects models (MEM) were performed to test the associations for current Hg exposure with respect to HFA interpretation indices and clusters, as well as for longitudinal past Hg exposure. RESULTS The clustering approach decomposed the light sensitivity deficits into 5 concentric clusters, with greatest loss in the peripheral clusters. No relation was observed between any of the cluster scores and current blood-Hg. VF deficits increased with past Hg exposure. Longitudinal MEM showed that HHg was significantly (p < 0.05) associated with all peripheral, paracentral, and central cluster scores, as well as with HFA interpretation indices. CONCLUSIONS Past Hg exposure in Grassy Narrows First Nation was associated with present day VF loss. The cluster-based location-specific approach identified patterns of VF loss associated with long-term Hg exposure, in both the peripheral and the central areas. The functional implications of this type of visual loss should be investigated.
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Affiliation(s)
- Aline Philibert
- Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l'environnement (CINBIOSE), CP 8888, Université du Québec À Montréal, Succ. Centreville, Montréal, Québec, H3C 3P8, Canada
| | - Benoit Tousignant
- School of Optometry, Université de Montréal, 3744 Jean-Brillant, Montréal, Québec, H3T 1P1, Canada
- Department of Social and Preventive Medicine, School of Public Health, Université de Montréal, 7101 Avenue du Parc, Montreal, QC, H3N 1X9, Canada
| | - Myriam Fillion
- Département Science et Technologie, Université TÉLUQ, 5800 Saint-Denis St, Montréal, Québec, H2S 3L4, Canada
| | - Judy Da Silva
- Grassy Narrows First Nation, General Delivery, Grassy Narrows, Ontario, P0X 1B0, Canada
| | - Donna Mergler
- Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l'environnement (CINBIOSE), CP 8888, Université du Québec À Montréal, Succ. Centreville, Montréal, Québec, H3C 3P8, Canada.
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3
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Jian X, Baeyens W, De Waele E, Guo W, Jia YW, Leemans L, Leermakers M, Van Larebeke N, Gao Y. Intake rates of methylmercury in the Belgian population: Evolution over 40 years. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176695. [PMID: 39366585 DOI: 10.1016/j.scitotenv.2024.176695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2024] [Revised: 09/30/2024] [Accepted: 10/01/2024] [Indexed: 10/06/2024]
Abstract
Methylmercury (MeHg) is one of the most toxic compounds, it bioaccumulates and biomagnifies along the food chain and finally damages human's nervous system. Knowing that the main intake route for MeHg in humans is through fish consumption, intake rates were studied in various countries, but not in Belgium. Based on Hg and MeHg measurements in various fishes, mainly from North Sea catches, in combination with the national food consumption surveys, we could calculate daily Hg and MeHg intake rates for the Belgian population in 1975, 1997 and 2014-2021. These values are then compared with daily intake values reported by other countries and with the acceptable daily intake (ADI) values recommended by international organizations. Daily Hg and MeHg intake rates decreased strongly between 1975 and the 2 later periods: while average intake rates are all below the ADI norms, this is not the case for the 95th percentile rates because they exceed or are very close to the ADI values. Since daily MeHg intake rates correlate well with hair and blood concentrations, these were used as a good proxy of MeHg intoxication and were related to health effects observed in children, adolescents, adults and elderly persons living in Belgium via biomonitoring.
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Affiliation(s)
- Xiao Jian
- Department of Clinical Nutrition, The Second Affiliated Hospital of Dalian Medical University, 467 Zhongshan Road, Shahekou District, 116023 Dalian, Liaoning Province, China; Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Willy Baeyens
- Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Elisabeth De Waele
- Vitality Research Group, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090, Brussels, Belgium.; Metabolism and Nutrition, Department of Clinical Nutrition, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090, Brussels, Belgium
| | - Wei Guo
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology (BJUT), Pingle Park 100, Chaoyang District, 100124 Beijing, PR China
| | - Yu-Wei Jia
- Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Lynn Leemans
- Vitality Research Group, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090, Brussels, Belgium
| | - Martine Leermakers
- Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Nik Van Larebeke
- Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Yue Gao
- Archaeology, Environmental Changes and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium.
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Pourzadi N, Gailer J. The emerging application of LC-based metallomics techniques to unravel the bioinorganic chemistry of toxic metal(loid)s. J Chromatogr A 2024; 1736:465409. [PMID: 39383623 DOI: 10.1016/j.chroma.2024.465409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Revised: 09/07/2024] [Accepted: 09/28/2024] [Indexed: 10/11/2024]
Abstract
The on-going anthropogenic emission of toxic metal(loid) species into the environment contaminates the food supply and drinking water resources in various parts of the world. Given that inorganic pollutants cannot be degraded, their increased influx into the bloodstream of babies, children and pregnant women is inevitable. Since the ramifications of the ensuing environmental exposure on human health remain poorly defined, fundamentally new insight into their bioinorganic chemistry in organisms is urgently needed. Based on the flow of dietary constituents through organisms, the interaction of toxic metal(loid) species with biomolecules in the bloodstream deserve particular attention as they play an integral role in the mechanisms of their chronic toxicity. Gaining insight into these bioinorganic processes is hampered by the biological complexity of plasma/red blood cells and the low concentrations of the metal(loid) species of interest, but can be overcome by employing LC techniques hyphenated to atomic spectroscopic detectors (i.e. metallomics techniques). This perspective aims to highlight the potential of unconventional hyphenated separation modes to advance our understanding of the bioinorganic chemistry of toxic metal(loid) species in the bloodstream-organ system. Four examples are illustrated. The application of anion-exchange (AEX) and size-exclusion chromatography (SEC) provided new insight into the blood-based bioinorganic mechanisms that direct Cd2+ and MeHg+ to target organs. AEX chromatography also allowed to observe the formation of complexes between Hg2+ and MeHg+ with L-cysteine at pH 7.4, that are implicated in their organ uptake. Lastly, the application of reversed phase (RP) chromatography revealed a possible cytosolic mechanism by which N-acetyl-L-cysteine binds to MeHg+ in the presence of cytosolic glutathione (GSH). New insight into other bioinorganic processes may advance the regulatory framework to better protect public health.
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Affiliation(s)
- Negar Pourzadi
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
| | - Jürgen Gailer
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada.
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Panzenhagen AC, Petry FDS, Alves-Teixeira A, Santos L, Carazza-Kessler FG, Gelain DP, Moreira JCF. Biomarkers of methylmercury neurotoxicity and neurodevelopmental features: A systematic review. Food Chem Toxicol 2024; 191:114851. [PMID: 38986832 DOI: 10.1016/j.fct.2024.114851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/02/2024] [Accepted: 07/04/2024] [Indexed: 07/12/2024]
Abstract
The issue of MeHg contamination is a significant concern due to its detrimental impact on the environment. This study aimed to thoroughly investigate the effects of MeHg on neurodevelopmental biomarkers, as there is a lack of systematic reviews in this area. We conducted a comprehensive search of three databases (PubMed, Scopus, and Web of Science) and found 522 records, which were then meticulously reviewed by two independent reviewers. A total of 66 studies were included, with biomarkers related to oxidative stress, neurotransmission, inflammation, epigenetics, and apoptosis being the most prominent. The results of both in vitro and in vivo models indicate that antioxidant enzymes and other oxidative stress-related markers are indeed, altered following MeHg exposure. Moreover, MeHg exposure causes significant disruptions to neurotransmitter levels, activities of neurotransmitter synthesis enzymes, receptor densities, and proteins involved in synaptic function. Proinflammatory biomarkers are consistently overexpressed in both MeHg-treated cells and the brains of exposed rats. Furthermore, studies on DNA methylation and biomarker activity suggest that MeHg exposure may lead to neurotoxicity and neurodevelopmental issues via perturbations to epigenetic markers and the apoptosis pathway.
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Affiliation(s)
- Alana Castro Panzenhagen
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil.
| | - Fernanda Dos Santos Petry
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Alexsander Alves-Teixeira
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Lucas Santos
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Flávio Gabriel Carazza-Kessler
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Daniel Pens Gelain
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos Em Estresse Oxidativo, Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
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6
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Chételat J, Jung TS, Awan M, Baryluk S, Harrower W, Kukka PM, McClelland C, Mowat G, Pelletier N, Rodford C, Stimmelmayr R. Tissue Distribution and Toxicological Risk Assessment of Mercury and Other Elements in Northern Populations of Wolverine (Gulo gulo). ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2024; 87:114-126. [PMID: 39097543 PMCID: PMC11377595 DOI: 10.1007/s00244-024-01081-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 07/16/2024] [Indexed: 08/05/2024]
Abstract
Wolverines are facultative scavengers that feed near the top of terrestrial food chains. We characterized concentrations of mercury and other trace elements in tissues of wolverine from a broad geographic area, representing much of their contemporary distribution in northwestern North America. We obtained tissues from 504 wolverines, from which mercury was measured on muscle (n = 448), kidney (n = 222), liver (n = 148), hair (n = 130), and brain (n = 52). In addition, methylmercury, seven trace elements (arsenic, cadmium, chromium, cobalt, lead, nickel, selenium), and arsenic compounds were measured on a subset of samples. Concentrations of mercury and other trace elements varied between tissues and were generally highest in kidney compared to brain, liver and muscle. Mercury was predominately as methylmercury in brain and muscle, but largely as inorganic mercury in liver and kidney. Mercury concentrations of hair were moderately correlated with those of internal tissues (Pearson r = 0.51-0.75, p ≤ 0.004), making hair a good non-lethal indicator of broad spatial or temporal differences in mercury exposure to wolverine. Arsenobetaine was the dominant arsenic compound identified in tissues, and arsenite, arsenocholine and dimethylarsinic acid were also detected. A preliminary risk assessment suggested the cadmium, lead, mercury, and selenium concentrations in our sample of wolverines were not likely to pose a risk of overt toxicological effects. This study generated a comprehensive dataset on mercury and other trace elements in wolverine, which will support future contaminants study of this northern terrestrial carnivore.
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Affiliation(s)
- John Chételat
- Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa, ON, Canada.
| | - Thomas S Jung
- Department of Environment, Government of Yukon, Whitehorse, YT, Canada
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
| | - Malik Awan
- Department of Environment, Government of Nunavut, Arviat, NU, Canada
| | - Steven Baryluk
- Environment and Climate Change, Government of the Northwest Territories, Inuvik, NT, Canada
| | - William Harrower
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Piia M Kukka
- Department of Environment, Government of Yukon, Whitehorse, YT, Canada
| | - Christine McClelland
- Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa, ON, Canada
| | - Garth Mowat
- Ministry of Forests, Government of British Columbia, Nelson, BC, Canada
- Department of Earth, Environmental and Geographic Sciences, University of British Columbia, Kelowna, BC, Canada
| | - Nicolas Pelletier
- Department of Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada
| | - Christine Rodford
- Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa, ON, Canada
| | - Raphaela Stimmelmayr
- Department of Wildlife Management, North Slope Borough, Utqiagvik, AK, USA
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA
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7
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Bank MS, Ho QT, Kutti T, Kögel T, Rodushkin I, van der Meeren T, Wiech M, Rastrick S. Multi-isotopic composition of brown crab (Cancer pagurus) and seafloor sediment from a mine tailing sea disposal impacted fjord ecosystem. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134406. [PMID: 38688218 DOI: 10.1016/j.jhazmat.2024.134406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
Sea disposal of mine tailings in fjord ecosystems is an important coastal management issue in Norway and occurs at the land-sea interface. Here we studied accumulation of heavy metals in brown crab (Cancer pagurus) and seafloor sediment from Jøssingfjord, Norway during 2018 to evaluate long-term, legacy pollution effects of coastal mine tailing sea disposal activities. Nickel and copper sediment pollution in the mine tailing sea disposal area was classified as moderate and severe, respectively, under Norwegian environmental quality standards, and highlights the persistent hazard and legacy impacts of heavy metals in these impacted fjord ecosystems. Mercury, zinc, and arsenic had stronger affinities to brown crab muscle likely due to the presence of thiols, and availability of metal binding sites. Our multi-isotopic composition data showed that lead isotopes were the most useful source apportionment tool for this fjord. Overall, our study highlights the importance and value of measuring several different heavy metals and multiple isotopic signatures in different crab organs and seafloor sediment to comprehensively evaluate fjord pollution and kinetic uptake dynamics. Brown crabs were suitable eco-indicators of benthic ecosystem heavy metal pollution in a fjord ecosystem still experiencing short- and long-term physical and chemical impacts from coastal mining sea disposal activities.
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Affiliation(s)
- Michael S Bank
- Institute of Marine Research, Bergen, Norway; University of Massachusetts Amherst, Amherst, MA, USA.
| | | | - Tina Kutti
- Institute of Marine Research, Bergen, Norway
| | - Tanja Kögel
- Institute of Marine Research, Bergen, Norway
| | - Ilia Rodushkin
- Division of Geosciences, Luleå University of Technology, SE-971 87 Luleå, Sweden; ALS Scandinavia AB, SE-971 87 Luleå, Sweden
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8
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Keenan M, Misarti N, Horstmann L, Crawford SG, O'Hara T, Rea LD, Avery JP. Total mercury concentrations in Steller sea lion bone: Variability among locations and elements. MARINE POLLUTION BULLETIN 2024; 203:116471. [PMID: 38754323 DOI: 10.1016/j.marpolbul.2024.116471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/03/2024] [Accepted: 05/04/2024] [Indexed: 05/18/2024]
Abstract
Mercury is a global contaminant that bioaccumulates in a tissue-specific manner in long-lived predators such as Steller sea lions (SSL). Bone is a well-preserved material amenable for studying millennial scale trends; however, little is known about the distribution and variability of total mercury concentrations ([THg]) within individual bones and among bone elements in SSL. We assessed SSL bone [THg] variability with respect to physiologic age, bone type, longitudinally within a bone, and among bone elements. Pup bones (mean ± SD; 31.4 ± 13.58 ppb) had greater [THg] than adults (7.9 ± 1.91 ppb). There were greater and more variable [THg] within individual long bones near epiphyses compared to mid-diaphysis. Pup spongy bone in ribs (62.7 ± 44.79 ppb) had greater [THg] than long bones (23.5 ± 8.83 ppb) and phalanges (19.6 ± 10.78 ppb). These differences are likely due to variability in bone composition, growth, and turnover rate. This study informs standardized sampling procedures for [THg] in bone to improve interpretations of mercury variability over time and space.
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Affiliation(s)
- Mary Keenan
- Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska, 1764 Tanana Loop, PO Box 75 5910, Fairbanks, AK 99775, USA; College of Fisheries and Ocean Sciences, University of Alaska, 2150 Koyukuk Drive, PO Box 757220, Fairbanks, AK 99775, USA.
| | - Nicole Misarti
- Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska, 1764 Tanana Loop, PO Box 75 5910, Fairbanks, AK 99775, USA
| | - Lara Horstmann
- College of Fisheries and Ocean Sciences, University of Alaska, 2150 Koyukuk Drive, PO Box 757220, Fairbanks, AK 99775, USA
| | - Stephanie G Crawford
- Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska, 1764 Tanana Loop, PO Box 75 5910, Fairbanks, AK 99775, USA
| | - Todd O'Hara
- Veterinary Integrative Biosciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, 402 Raymond Stotzer Pkwy, College Station, TX 77843, USA
| | - Lorrie D Rea
- Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska, 1764 Tanana Loop, PO Box 75 5910, Fairbanks, AK 99775, USA
| | - Julie P Avery
- Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska, 1764 Tanana Loop, PO Box 75 5910, Fairbanks, AK 99775, USA
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9
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Ke T, Rajoo A, Tinkov AA, Skalny AV, Tizabi Y, Rocha JBT, Bowman AB, Aschner M. Intestinal microbiota protects against methylmercury-induced neurotoxicity. Biometals 2024; 37:561-576. [PMID: 37973679 DOI: 10.1007/s10534-023-00554-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/14/2023] [Indexed: 11/19/2023]
Abstract
Methylmercury (MeHg) remains a global public health issue because of its frequent presence in human food sources obtained from the water. The excretion of MeHg in humans occurs slowly with a biological half-time of 32-47 days. Short-term MeHg exposure may cause long-lasting neurotoxicity. The excretion through feces is a major route in the demethylation of MeHg. Accumulating evidence suggests that the intestinal microbiota plays an important role in the demethylation of MeHg, thereby protecting the host from neurotoxic effects. Here, we discuss recent developments on the role of intestinal microbiota in MeHg metabolism, based on in vitro cell culture experiments, experimental animal studies and human investigations. Demethylation by intestinal bacteria is the rate-limiting step in MeHg metabolism and elimination. The identity of bacteria strains responsible for this biotransformation is currently unknown; however, the non-homogenous distribution of intestinal microbiota may lead to different demethylation rates in the intestinal tract. The maintenance of intestinal barrier function by intestinal microbiota may afford protection against MeHg-induced neurotoxicity, which warrant future investigations. We also discuss studies investigating the effects of MeHg exposure on the population structural stability of intestinal microbiota in several host species. Although this is an emerging area in metal toxicity, current research suggests that a change in certain phyla in the intestinal microbiota may indicate MeHg overexposure.
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Affiliation(s)
- Tao Ke
- Department of Biological Sciences, University of Delaware, Newark, DE, 19716, USA
| | - André Rajoo
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, 33458, USA
- Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, 33431, USA
| | - Alexey A Tinkov
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119991
- Yaroslavl State University, Yaroslavl, Russia, 150003
- Institute of Cellular and Intracellular Symbiosis, Russian Academy of Sciences, Orenburg, Russia, 460000
| | - Anatoly V Skalny
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119991
- Department of Medical Elementology, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia, 117198
| | - Yousef Tizabi
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, 20059, USA
| | - Joao B T Rocha
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, 97105900, RS, Brazil
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, IN, 47907-2051, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue Forchheimer Building, Room 209, Bronx, NY, 10461, USA.
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Carvalho VHV, Rodrigues JCG, Vinagre LWMS, Pereira EEB, Monte N, Fernandes MR, Ribeiro-Dos-Santos AM, Guerreiro JF, Ribeiro-Dos-Santos Â, Dos Santos SEB, Dos Santos NPC. Genomic investigation on genes related to mercury metabolism in Amazonian indigenous populations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171232. [PMID: 38402986 DOI: 10.1016/j.scitotenv.2024.171232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 02/27/2024]
Abstract
Studies have identified elevated levels of mercury in Amazonian Indigenous individuals, highlighting them as one of the most exposed to risks. In the unique context of the Brazilian Indigenous population, it is crucial to identify genetic variants with clinical significance to better understand vulnerability to mercury and its adverse effects. Currently, there is a lack of research on the broader genomic profile of Indigenous people, particularly those from the Amazon region, concerning mercury contamination. Therefore, the aim of this study was to assess the genomic profile related to the processes of mercury absorption, distribution, metabolism, and excretion in 64 Indigenous individuals from the Brazilian Amazon. We aimed to determine whether these individuals exhibit a higher susceptibility to mercury exposure. Our study identified three high-impact variants (GSTA1 rs1051775, GSTM1 rs1183423000, and rs1241704212), with the latter two showing a higher frequency in the study population compared to global populations. Additionally, we discovered seven new variants with modifier impact and a genomic profile different from the worldwide populations. These genetic variants may predispose the study population to more harmful mercury exposure compared to global populations. As the first study to analyze broader genomics of mercury metabolism pathways in Brazilian Amazonian Amerindians, we emphasize that our research aims to contribute to public policies by utilizing genomic investigation as a method to identify populations with a heightened susceptibility to mercury exposure.
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Affiliation(s)
- Victor Hugo Valente Carvalho
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil.
| | - Juliana Carla Gomes Rodrigues
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - Lui Wallacy Morikawa Souza Vinagre
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - Esdras Edgar Batista Pereira
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - Natasha Monte
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - Marianne Rodrigues Fernandes
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - André Maurício Ribeiro-Dos-Santos
- Laboratório de Genética Humana e Médica, Instituto de Ciências Biológicas, Universidade Federal do Pará, 66075-110, Belém, Pará, Brazil
| | - João Farias Guerreiro
- Laboratório de Genética Humana e Médica, Instituto de Ciências Biológicas, Universidade Federal do Pará, 66075-110, Belém, Pará, Brazil
| | - Ândrea Ribeiro-Dos-Santos
- Laboratório de Genética Humana e Médica, Instituto de Ciências Biológicas, Universidade Federal do Pará, 66075-110, Belém, Pará, Brazil
| | - Sidney Emanuel Batista Dos Santos
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
| | - Ney Pereira Carneiro Dos Santos
- Núecleo de Pesquisas em Oncologia, Unidade de Alta Complexidade em Oncologia, Hospital Universitário João de Barros Barreto, 66073-005 Belém, Pará, Brazil
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11
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Gosnell KJ, Mazrui N, Mason RP. Properties influencing flux and diatom uptake of mercury and methylmercury from estuarine sediments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 346:123604. [PMID: 38423275 DOI: 10.1016/j.envpol.2024.123604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/07/2024] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
Mercury (Hg) is a conspicuous and persistent global pollutant. Ionic Hg can be methylated into noxious methylmercury (CH3Hg), which biomagnifies in marine tropic webs and poses a health risk to humans and organisms. Sediment Hg methylation rates are variable, and the output flux of created CH3Hg are dependent on sediment characteristics and environmental factors. Thus, uncertainties remain about the formation and flux of CH3Hg from sediment, and how this could contribute to the bioaccumulative burden for coastal organisms in shallow ecosystems. Cores were collected from 3 estuarine locations along the Eastern USA to examine how sediments characteristics influence the introduction of Hg and CH3Hg into the base of the food chain. Stable isotopes of inorganic 200Hg and CH3199Hg were injected into sediments of individual cores, with cultured diatoms constrained to overlying waters. Five different treatments were done on duplicate cores, spiked with: (1) no Hg isotopes (control); (2) inorganic 200Hg; (3) CH3199Hg; (4) both 200Hg and CH3199Hg isotopes, (5) both 200Hg and CH3199Hg into overlying waters (not sediment). Experimental cores were incubated for 3 days under temperature and light controlled conditions. These results demonstrate that upper sediments characteristics lead to high variability in Hg cycling. Notably, sediments which contained abundant and peaty organic material (∼28 %LOI), had the highest pore water DOC (3206 μM) and displayed bands of sulfur reducing bacteria yielded the greatest methylation rate (1.97 % day-1) and subsequent diatom uptake of CH3200Hg (cell quota 0.18 amol/cell) in the overlying water.
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Affiliation(s)
- Kathleen J Gosnell
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Department of Marine Sciences, University of Connecticut, Groton, CT, USA.
| | - Nashaat Mazrui
- Department of Marine Sciences, University of Connecticut, Groton, CT, USA; Okavango Research Institute, University of Botswana, Manu, Botswana
| | - Robert P Mason
- Department of Marine Sciences, University of Connecticut, Groton, CT, USA
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12
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von Hellfeld R, Hastings A. An approach to assessing subsea pipeline-associated mercury release into the North Sea and its potential environmental and human health impact. ROYAL SOCIETY OPEN SCIENCE 2024; 11:230943. [PMID: 38481980 PMCID: PMC10935551 DOI: 10.1098/rsos.230943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 12/19/2023] [Accepted: 02/05/2024] [Indexed: 04/26/2024]
Abstract
Mercury is a naturally occurring heavy metal that has also been associated with anthropogenic sources such as cement production or hydrocarbon extraction. Mercury is a contaminant of concern as it can have a significant negative impact on organismal health when ingested. In aquatic environments, it bioaccumulates up the foodweb, where it then has the potential to impact human health. With the offshore hydrocarbon platforms in the North Sea nearing decommissioning, they must be assessed as a potential source for the environmental release of mercury. International treaties govern the handling of materials placed in the ocean. Studies have assessed the ecologic and economic benefits of (partial) in situ abandonment of the infrastructure as artificial reefs. This can be applied to pipelines after substantial cleaning to remove mercury accumulation from the inner surface. This work outlines the application of an approach to modelling marine mercury bioaccumulation for decommissioning scenarios in the North Sea. Here, in situ decommissioning of cleaned pipelines was unlikely to have a negative impact on the North Sea food web or human health. However, significant knowledge gaps have been determined, which must be addressed before all negative impacts on ecosystems and organismal health can be excluded.
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Affiliation(s)
- Rebecca von Hellfeld
- School of Biological Sciences, University of Aberdeen, 23 St Machar Drive, AberdeenAB24 3UL, UK
- National Decommissioning Centre, Main Street, NewburghAB41 6AA, UK
| | - Astley Hastings
- School of Biological Sciences, University of Aberdeen, 23 St Machar Drive, AberdeenAB24 3UL, UK
- National Decommissioning Centre, Main Street, NewburghAB41 6AA, UK
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13
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Burger J, Feigin S, Fojtik A, Dey A, Ng K. Bioaccumulation of Some Metals and Metalloids in Laughing Gulls ( Leucophaeus atricilla): Increases in Mercury and Decreases in Selenium from 2019 to 2022/2023. TOXICS 2023; 11:1007. [PMID: 38133408 PMCID: PMC10748039 DOI: 10.3390/toxics11121007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
The elements in blood normally reflect the levels in prey, indicating a recent exposure. Laughing gulls (Leucophaes atricilla) eat mainly horseshoe crab eggs (Limulus polyphemus) in the spring in Delaware Bay, New Jersey. The levels of arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), mercury (Hg), and selenium (Se) in the blood of laughing gulls foraging on crab eggs were examined in Delaware Bay to provide information on a species that is normally a generalist, and to determine if the levels of these elements were similar in 2019 and 2022/2023, were intercorrelated, and were related to those in crab eggs. Hg increased from 2019 (136 ± 31 ng/g) to 2022/2023 (473 ± 75 ng/g), while Cd and Se decreased. There were some significant correlations among elements and a close relationship between the element levels in blood and those in crab eggs collected in the same month (except for As). The levels differed between laughing gulls and three species of shorebirds for As and Cd. The elements in the blood of gulls and shorebirds should be similar because they eat mainly the same eggs in the same places. A significant proportion of laughing gull blood samples had levels of Hg and Se that were above the levels associated with adverse effects, which requires further examination.
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Affiliation(s)
- Joanna Burger
- Division of Life Sciences, Rutgers University, 604 Allison Road, Piscataway, NJ 08854, USA;
- Environmental and Occupational Health Sciences Institute (EOHSI), Piscataway, NJ 08854, USA
- Environmental Science Graduate Program, Rutgers University, New Brunswick, NJ 08903, USA;
- Ecology and Evolution Graduate Program, Rutgers University, New Brunswick, NJ 08903, USA
| | - Stephanie Feigin
- Environmental Science Graduate Program, Rutgers University, New Brunswick, NJ 08903, USA;
- Wildlife Restoration Partnerships, 109 Market Lane, Greenwich, NJ 08323, USA
| | - Alinde Fojtik
- Southeastern Cooperative Wildlife Disease Study, University of Georgia, 589 D.W. Brooks Drive, Athens, GA 30677, USA;
| | - Amanda Dey
- 109 Market Lane, Greenwich, NJ 08323, USA;
| | - Kelly Ng
- Division of Life Sciences, Rutgers University, 604 Allison Road, Piscataway, NJ 08854, USA;
- Ecology and Evolution Graduate Program, Rutgers University, New Brunswick, NJ 08903, USA
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14
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Burger J, Feigin S, Ng K, Jeitner C, Tsipoura N, Niles L, Gochfeld M. Some metals and metalloids in the blood of three species of shorebirds increase while foraging during two-week migratory stopover in Delaware Bay, New Jersey. ENVIRONMENTAL RESEARCH 2023; 238:117194. [PMID: 37748669 PMCID: PMC10841762 DOI: 10.1016/j.envres.2023.117194] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 09/27/2023]
Abstract
Most migratory shorebird species are declining, some are endangered, and some may be vulnerable to contaminants on long distance travel between wintering grounds and high latitude breeding grounds. We examined whether shorebirds accumulated trace elements at the Delaware Bay (New Jersey) stopover by testing the null hypothesis that there was no difference in the levels of arsenic, cadmium, chromium, lead, mercury, and selenium in blood of three species of shorebirds collected early in their stopover compared to levels in blood collected about two weeks later near the end of the stopover, before departing for breeding grounds. There were significantly higher levels of all metals and metalloids in the blood of ruddy turnstone (Arenaria interpres) later in May than earlier. There were seasonal increases in blood levels of arsenic and selenium for all three species. Chromium and lead levels also increased in red knots (Calidris canutus). These increases occurred although the birds were only present for about two weeks. Levels of arsenic, mercury, and lead in knots and selenium in sanderlings (Calidrris alba), exceeded reported effects levels. These results have potential implications for studying the refueling physiology, energetics, and feeding behavior of migratory shorebirds. However, they also suggest cause for concern because the increased contaminant loads occur in a short period, and the high metal level bolus received all in a few days may result in adverse effects.
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Affiliation(s)
- Joanna Burger
- Division of Life Sciences, Rutgers University, 604 Allison Road, Piscataway, NJ, 08854-8082, USA; Environmental and Occupational Health Sciences Institute (EOHSI), Piscataway, New Jersey, 08854, USA; Consortium for Risk Evaluation with Stakeholder Participation, Rutgers University, Piscataway, NJ, 08854, USA; Environmental Science Graduate Program, Rutgers University, New Brunswick, New Jersey, 08903, USA; Ecology and Evolution Graduate Program, Rutgers University, New Brunswick, New Jersey, USA, 08903.
| | - Stephanie Feigin
- Environmental Science Graduate Program, Rutgers University, New Brunswick, New Jersey, 08903, USA; Wildlife Restoration Partnership, 109 Market Land, Greenwich, N 08323, USA.
| | - Kelly Ng
- Division of Life Sciences, Rutgers University, 604 Allison Road, Piscataway, NJ, 08854-8082, USA; Consortium for Risk Evaluation with Stakeholder Participation, Rutgers University, Piscataway, NJ, 08854, USA; Ecology and Evolution Graduate Program, Rutgers University, New Brunswick, New Jersey, USA, 08903.
| | - Christian Jeitner
- Consortium for Risk Evaluation with Stakeholder Participation, Rutgers University, Piscataway, NJ, 08854, USA.
| | - Nellie Tsipoura
- New Jersey Audubon Society, 11 Hardscrabble Rd, Bernardsville, NJ, 07924, USA.
| | - Larry Niles
- Wildlife Restoration Partnership, 109 Market Land, Greenwich, N 08323, USA.
| | - Michael Gochfeld
- Environmental and Occupational Health Sciences Institute (EOHSI), Piscataway, New Jersey, 08854, USA; Consortium for Risk Evaluation with Stakeholder Participation, Rutgers University, Piscataway, NJ, 08854, USA; Environmental and Occupational Health & Justice, Rutgers University School of Public Health, Piscataway, New Jersey, USA, 08854.
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15
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Chamorro F, Otero P, Carpena M, Fraga-Corral M, Echave J, Seyyedi-Mansour S, Cassani L, Prieto MA. Health Benefits of Oily Fish: Illustrated with Blue Shark ( Prionace glauca), Shortfin Mako Shark ( Isurus oxyrinchus), and Swordfish ( Xiphias gladius). Nutrients 2023; 15:4919. [PMID: 38068777 PMCID: PMC10708079 DOI: 10.3390/nu15234919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/11/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Oily fish is a rich source of energy, proteins, essential amino acids, lipids, vitamins, and minerals. Among the macronutrients with the highest contribution are lipids, mainly long-chain omega 3 polyunsaturated fatty acids (ω-3 LC-PUFA), especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Both EPA and DHA play a beneficial role in promoting health and preventing many diseases, including cardiovascular diseases, such as stroke and acute myocardial infarction. They also contribute to the prevention of neurological, metabolic, and immune-system-related diseases, as well as supporting body-weight control. Oily fish consumption is also important at different stages of human life, from conception to old age. For example, DHA plays an important role in brain and retina development during fetal development and in the first two years of life, as it positively influences neurodevelopment, such as visual acuity, and cognitive functions. In contrast with the possible health benefits of the intake of oily fish, the presence of certain chemical pollutants, for example, heavy metals, can be a risk for the health of consumers, mainly in sensitive population groups such as pregnant women and children under 2 years of age. The presence of these pollutants is influenced to a greater extent by fish species, their role in the trophic chain, and their size. However, various studies state that the benefits outweigh the risk of consuming certain species. This review will be focused on the health benefits of the intake of three oily fish species, namely blue shark (Prionace glauca), shortfin mako shark (Isurus oxyrinchus), and swordfish (Xiphias gladius).
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Affiliation(s)
| | | | | | | | | | | | | | - Miguel A. Prieto
- Nutrition and Bromatology Group, Department of Analytical Chemistry and Food Science, Instituto de Agroecoloxía e Alimentación (IAA)—CITEXVI, Universidade de Vigo, 36310 Vigo, Spain; (F.C.); (P.O.); (M.C.); (M.F.-C.); (J.E.); (S.S.-M.); (L.C.)
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16
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Packull-McCormick S, Cowan A, Stark KD, Low M, Gamberg M, Swanson H, Laird B. Mercury bioaccessiblity in freshwater fish species from northern Canada. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165624. [PMID: 37478927 DOI: 10.1016/j.scitotenv.2023.165624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/30/2023] [Accepted: 07/16/2023] [Indexed: 07/23/2023]
Abstract
Indigenous communities in northern Canada rely on locally harvested traditional foods, including fish, which provides them with nutritional, cultural, and social benefits. However, mercury exposure from fish consumption can pose a health risk for populations that consume large amounts of fish with elevated mercury concentrations. The bioaccessiblity of mercury in the tissue of northern Canadian freshwater fish is not yet known. To address this, samples from five commonly consumed freshwater fish species (Lake Trout, Northern Pike, Walleye, Lake Whitefish, and Burbot) caught from lakes in the Northwest Territories and Yukon, Canada were examined. Total mercury concentrations, fatty acid composition, and total mercury bioaccessibility differed significantly among fish species and lakes. Mean total mercury bioaccessibility using an in vitro gastrointestinal model ranged between 56 % and 96 % in muscle tissue across fish species and waterbodies examined and was 39 % in liver tissue from Burbot. Mean total mercury bioaccessibility was much lower (range: 38 % to 42 %) for a subset of samples run through only the gastric phase of the digestion model. Total mercury bioaccessibility was significantly lower (on average 40 % lower) in a subset of samples that were pan-fried in water. Thus, although cooking increased total mercury concentrations in pan-fried fish samples (likely due to moisture loss), bioaccessible concentrations of total mercury were lower (on average 32 % lower). Results from this study contribute to addressing a large knowledge gap in the literature regarding bioaccessibility of total mercury in northern freshwater fish species. To the best of our knowledge, this is the first study to examine mercury bioaccessibility in raw and cooked liver samples from freshwater fish. It also adds to the growing literature indicating that mercury bioaccessibility varies among fish species, locations, and cooking/preparation methods.
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Affiliation(s)
- Sara Packull-McCormick
- School of Public Health Sciences, Faculty of Health, University of Waterloo, 200 University Ave W, Waterloo, Canada
| | - Alicia Cowan
- School of Public Health Sciences, Faculty of Health, University of Waterloo, 200 University Ave W, Waterloo, Canada
| | - Ken D Stark
- Department of Kinesiology and Health Sciences, Faculty of Health, University of Waterloo, 200 University Ave W, Waterloo, Canada
| | - Mike Low
- Dehcho Aboriginal Aquatic Resources & Oceans Management, Fort Simpson, NT, Canada
| | - Mary Gamberg
- Gamberg Consulting, 11267, Whitehorse, Yukon, Canada
| | - Heidi Swanson
- Department of Biology, Faculty of Science, University of Waterloo, 200 University Ave W, Waterloo, Canada
| | - Brian Laird
- School of Public Health Sciences, Faculty of Health, University of Waterloo, 200 University Ave W, Waterloo, Canada.
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17
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Zhu K, Chen D, Cai Y, Zhang T, Ma J, Bao L, Zhao F, Wu L, Chen S. Engineering the Ultrasensitive Visual Whole-Cell Biosensors by Evolved MerR and 5' UTR for Detection of Ultratrace Mercury. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:16964-16973. [PMID: 37863904 DOI: 10.1021/acs.est.3c04915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
The existing mercury whole-cell biosensors (WCBs, parts per billion range) are not able to meet the real-world requirements due to their lack of sensitivity for the detection of ultratrace mercury in the environment. Ultratrace mercury is a potential threat to human health via the food chain. Here, we developed an ultrasensitive mercury WCB by directed evolution of the mercury-responsive transcriptional activator (MerR) sensing module to detect ultratrace mercury. Subsequently, the mutant WCB (m4-1) responding to mercury in the parts per trillion range after 1 h of induction was obtained. Its detection limit (LOD) was 0.313 ng/L, comparable to those of some analytical instruments. Surprisingly, the m4-1 WCB also responded to methylmercury (LOD = 98 ng/L), which is far more toxic than inorganic mercury. For more convenient detection, we have increased another green fluorescent protein reporter module with an optimized 5' untranslated region (5' UTR) sequence. This yields two visual WCBs with an enhanced fluorescence output. At a concentration of 2.5 ng/L, the fluorescence signals can be directly observed by the naked eye. With the combination of mobile phone imaging and image processing software, the 2GC WCB provided simple, rapid, and reliable quantitative and qualitative analysis of real samples (LOD = 0.307 ng/L). Taken together, these results indicate that the ultrasensitive visual whole-cell biosensors for ultratrace mercury detection are successfully designed using a combination of directed evolution and synthetic biotechnology.
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Affiliation(s)
- Kaili Zhu
- Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, China, P. R. China
| | - Dongdong Chen
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Yeshen Cai
- Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, China, P. R. China
| | - TianYi Zhang
- School of Public Health, Wannan Medical College, Wuhu 241002, P. R. China
| | - Jie Ma
- School of Public Health, Wannan Medical College, Wuhu 241002, P. R. China
| | - Lingzhi Bao
- School of Public Health, Wannan Medical College, Wuhu 241002, P. R. China
| | - Feng Zhao
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, P. R. China
| | - Lijun Wu
- Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, China, P. R. China
| | - Shaopeng Chen
- School of Public Health, Wannan Medical College, Wuhu 241002, P. R. China
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18
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Yoshino K, Yamada K, Kanaya G, Komorita T, Okamoto K, Tanaka M, Tada Y, Henmi Y, Yamamoto M. Food Web Structures and Mercury Exposure Pathway to Fish in Minamata Bay. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 85:360-373. [PMID: 37919444 DOI: 10.1007/s00244-023-01040-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 10/11/2023] [Indexed: 11/04/2023]
Abstract
We analyzed total mercury content (THg) and carbon (δ13C) and nitrogen (δ15N) stable isotope ratios in fish, subtidal macrobenthos, and particulate organic matter (POM) as a proxy for pelagic phytoplankton and attached microalgae as a proxy for microphytobenthos to investigate the mercury exposure pathway in fish. For four seasons, samples of the above-mentioned organisms were collected on five occasions (July and October 2018 and January, April, and July 2019) in Minamata Bay. Isotope analysis showed that Minamata Bay food web structures were almost entirely fueled by microphytobenthos. The THg values of the fish and macrobenthos species were positively correlated with their δ13C. This indicates that their diets, which were highly fueled by microphytobenthos, led to high THg bioaccumulation in both macrobenthos and fish. The feeding habits of fishes differ depending on the species, and they prey on organisms of many taxa, including fish (mainly Japanese anchovy), crabs, shrimp, copepods, annelids, and algae. Fish species that preyed on benthic crustaceans had high THg. These results suggest that the main pathway of Hg bioaccumulation in fish from Minamata Bay is the benthic food chain, which is primarily linked to benthic crustaceans fueled by microphytobenthos.
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Affiliation(s)
- Kenji Yoshino
- National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan.
| | - Katsumasa Yamada
- Aitsu Marine Station, Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, Matstushima, Kami-Amakusa, Kumamoto, 861-6102, Japan
| | - Gen Kanaya
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Tomohiro Komorita
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100 Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Kai Okamoto
- Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan
| | - Masaatsu Tanaka
- Department of Biology, Keio University, 4-1-1 Hiyoshi, Yokohama, 223-8521, Japan
| | - Yuya Tada
- National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan
| | - Yasuhisa Henmi
- Aitsu Marine Station, Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, Matstushima, Kami-Amakusa, Kumamoto, 861-6102, Japan
| | - Megumi Yamamoto
- National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan
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19
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Milea ȘA, Lazăr NN, Simionov IA, Petrea ȘM, Călmuc M, Călmuc V, Georgescu PL, Iticescu C. Effects of cooking methods and co-ingested foods on mercury bioaccessibility in pontic shad ( Alosa immaculata). Curr Res Food Sci 2023; 7:100599. [PMID: 37790855 PMCID: PMC10542595 DOI: 10.1016/j.crfs.2023.100599] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/28/2023] [Accepted: 09/18/2023] [Indexed: 10/05/2023] Open
Abstract
Human mercury (Hg) exposure is mostly caused by eating fish. However, there are major differences between the measured and predicted mercury concentration on Hg bioavailability. This study investigated the effects of cooking (steaming, baking, frying, marinating, and smoking) and selected components' co-ingestion on Hg bioaccessibility. Baking and frying reduced Hg bioaccessibility compared to the raw sample. The bioaccessible Hg fraction in fish was assessed through in vitro digestion method. Hg bioaccessibility varied from 4.31 to nearly 24.95% and the Hg recovery rate varied from 63.44 to 78.74%. Co-ingested garlic and broccoli with pontic shad had a positive effect on decreasing fish Hg bioaccessibility. The antioxidant activity of co-ingested food items was also calculated and correlated with mercury bioaccessibility. These results highlighted a possible positive role of plant-based foods and other food processing techniques in the bioaccessibility reduction of other chemical contaminants found in food sources.
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Affiliation(s)
- Ștefania-Adelina Milea
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
| | - Nina-Nicoleta Lazăr
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
| | - Ira-Adeline Simionov
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
- Dunărea de Jos University of Galati, Faculty of Food Science and Engineering, Domnească Street 111, 800201, Galati, Romania
| | - Ștefan-Mihai Petrea
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
- Dunărea de Jos University of Galati, Faculty of Food Science and Engineering, Domnească Street 111, 800201, Galati, Romania
| | - Mădălina Călmuc
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
| | - Valentina Călmuc
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
| | - Puiu-Lucian Georgescu
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
- Department of Chemistry, Physics and Environment, Faculty of Science and Environment, “Dunarea de Jos” University of Galati, Romania, REXDAN Research Infrastructure, Romania
| | - Cătălina Iticescu
- REXDAN Research Infrastructure, “Dunarea de Jos” University of Galati, George Coșbuc Street, 98, Galati, Romania
- Department of Chemistry, Physics and Environment, Faculty of Science and Environment, “Dunarea de Jos” University of Galati, Romania, REXDAN Research Infrastructure, Romania
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Martinez-Morata I, Sobel M, Tellez-Plaza M, Navas-Acien A, Howe CG, Sanchez TR. A State-of-the-Science Review on Metal Biomarkers. Curr Environ Health Rep 2023; 10:215-249. [PMID: 37337116 PMCID: PMC10822714 DOI: 10.1007/s40572-023-00402-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2023] [Indexed: 06/21/2023]
Abstract
PURPOSE OF REVIEW Biomarkers are commonly used in epidemiological studies to assess metals and metalloid exposure and estimate internal dose, as they integrate multiple sources and routes of exposure. Researchers are increasingly using multi-metal panels and innovative statistical methods to understand how exposure to real-world metal mixtures affects human health. Metals have both common and unique sources and routes of exposure, as well as biotransformation and elimination pathways. The development of multi-element analytical technology allows researchers to examine a broad spectrum of metals in their studies; however, their interpretation is complex as they can reflect different windows of exposure and several biomarkers have critical limitations. This review elaborates on more than 500 scientific publications to discuss major sources of exposure, biotransformation and elimination, and biomarkers of exposure and internal dose for 12 metals/metalloids, including 8 non-essential elements (arsenic, barium, cadmium, lead, mercury, nickel, tin, uranium) and 4 essential elements (manganese, molybdenum, selenium, and zinc) commonly used in multi-element analyses. RECENT FINDINGS We conclude that not all metal biomarkers are adequate measures of exposure and that understanding the metabolic biotransformation and elimination of metals is key to metal biomarker interpretation. For example, whole blood is a good biomarker of exposure to arsenic, cadmium, lead, mercury, and tin, but it is not a good indicator for barium, nickel, and uranium. For some essential metals, the interpretation of whole blood biomarkers is unclear. Urine is the most commonly used biomarker of exposure across metals but it should not be used to assess lead exposure. Essential metals such as zinc and manganese are tightly regulated by homeostatic processes; thus, elevated levels in urine may reflect body loss and metabolic processes rather than excess exposure. Total urinary arsenic may reflect exposure to both organic and inorganic arsenic, thus, arsenic speciation and adjustment for arsebonetaine are needed in populations with dietary seafood consumption. Hair and nails primarily reflect exposure to organic mercury, except in populations exposed to high levels of inorganic mercury such as in occupational and environmental settings. When selecting biomarkers, it is also critical to consider the exposure window of interest. Most populations are chronically exposed to metals in the low-to-moderate range, yet many biomarkers reflect recent exposures. Toenails are emerging biomarkers in this regard. They are reliable biomarkers of long-term exposure for arsenic, mercury, manganese, and selenium. However, more research is needed to understand the role of nails as a biomarker of exposure to other metals. Similarly, teeth are increasingly used to assess lifelong exposures to several essential and non-essential metals such as lead, including during the prenatal window. As metals epidemiology moves towards embracing a multi-metal/mixtures approach and expanding metal panels to include less commonly studied metals, it is important for researchers to have a strong knowledge base about the metal biomarkers included in their research. This review aims to aid metals researchers in their analysis planning, facilitate sound analytical decision-making, as well as appropriate understanding and interpretation of results.
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Affiliation(s)
- Irene Martinez-Morata
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, 1107, New York, NY, 10032, USA.
| | - Marisa Sobel
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, 1107, New York, NY, 10032, USA
| | - Maria Tellez-Plaza
- Centro Nacional de Epidemiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, 1107, New York, NY, 10032, USA
| | - Caitlin G Howe
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA
| | - Tiffany R Sanchez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, 1107, New York, NY, 10032, USA
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Senoro DB, Plasus MMG, Gorospe AFB, Nolos RC, Baaco AT, Lin C. Metals and Metalloid Concentrations in Fish, Its Spatial Distribution in PPC, Philippines and the Attributable Risks. TOXICS 2023; 11:621. [PMID: 37505586 PMCID: PMC10383155 DOI: 10.3390/toxics11070621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/29/2023]
Abstract
Fish is an important source of protein in human meals around the world. However, the fish that we are eating may be contaminated with toxicants such as metals and metalloids (MMs), which may pose health risks to consumers. Information on MMs content in fishes and their potential spatial distribution scenarios would provide knowledge to the community to create strategies and protect human health. Hence, this study assessed and determined the health risk levels of MMs in both brackish and marine water fish (BMF) in Puerto Princesa City (PPC), Palawan Province, Philippines. PPC has an existing abandoned open mine pit near the PPC coastline called the "pit lake". The concentrations of As, Ba, Cu, Fe, Mn, Hg, and Zn in fishes were analyzed using portable Olympus Vanta X-ray Fluorescence (pXRF), and the spatial distribution of MMs concentrations in BMF was analyzed using a GIS (geographic information system). Fishes were sampled from fishing boat landing sites and nearby seafood markets. The results revealed that the concentration of MMs in marine fish was generally higher than the brackish water fish. It was recorded that the Hg concentration in marine water fish meat was higher than in brackish water fish meat. The Mn concentration in marine water fish exceeded the permissible limits set by international bodies. An elevated concentration of Mn in BMF was detected across the northern part of PPC, and an elevated concentration of Hg in marine fishes was recorded in the southeast area, where the fish landing sites are located. Ba was also detected in BMF across the southern part of PPC. Moreover, an elevated concentration of Cu was detected in MBF in the northeast and in marine fish in the southeastern area of PPC. Further, this paper elaborates the non-carcinogenic and carcinogenic risks of these fishes to the PPC population and tourists with respect to the MMs content in fish meat.
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Affiliation(s)
- Delia B Senoro
- School of Civil, Environmental and Geological Engineering, Mapua University, Manila 1002, Philippines
- Resiliency and Sustainable Development Laboratory, Yuchengco Innovation Center, Mapua University, Manila 1002, Philippines
- Mapua-MSC Joint Research Laboratory, Marinduque State College, Boac 4900, Philippines
| | - Maria Mojena G Plasus
- College of Fisheries and Aquatic Sciences, Abba Building, Western Philippines University, San Juan 5300, Philippines
| | - Alejandro Felipe B Gorospe
- Resiliency and Sustainable Development Laboratory, Yuchengco Innovation Center, Mapua University, Manila 1002, Philippines
| | - Ronnel C Nolos
- Mapua-MSC Joint Research Laboratory, Marinduque State College, Boac 4900, Philippines
- College of Environmental Studies, Marinduque State College, Boac 4900, Philippines
| | - Allaine T Baaco
- College of Fisheries and Aquatic Sciences, Abba Building, Western Philippines University, San Juan 5300, Philippines
- College of Agriculture, Forestry and Environmental Sciences, Western Philippines University, San Juan 5302, Philippines
| | - Chitsan Lin
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
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Perrot V, Ma T, Vandeputte D, Smolikova V, Bratkic A, Leermakers M, Baeyens W, Gao Y. Origin and partitioning of mercury in the polluted Scheldt Estuary and adjacent coastal zone. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163019. [PMID: 36996990 DOI: 10.1016/j.scitotenv.2023.163019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/04/2023] [Accepted: 03/19/2023] [Indexed: 05/13/2023]
Abstract
Estuaries and coastal zones are areas with complex biogeochemical and hydrological cycles and are generally facing intense pollution due to anthropogenic activities. An emblematic example is the Scheldt Estuary which ends up in the North Sea and has been historically heavily contaminated by multiple pollutants, including mercury (Hg). We report here Hg species and their levels in surface waters of the Scheldt Estuary and the Belgian Part of North Sea (BPNS) from different sampling campaigns in February-April 2020 and 2021. Along the estuary, Hg concentration on suspended particles ([HgSPM]) progressively decreased with increasing salinity and was strongly correlated with organic matter content (%Corg) and origin (identified with δ13Corg). While [HgSPM] drives total Hg concentration in the estuary (total dissolved Hg, HgTD is only 7 ± 6 %), annual and daily variations of total Hg levels were mostly attributed to changes in SPM loads depending on river discharge and tidal regime. In the BPNS, a significant fraction of total Hg occurs as HgTD (40 ± 21 %) and the majority of this HgTD was reducible (i.e. labile Hg), meaning potentially available for microorganisms. Compared to the '90s, a significant decrease of [HgSPM] was observed in the estuary, but this was not the case for [HgTD], which can be due to (1) still significant discrete discharges from Antwerp industrial area, and (2) higher Hg partitioning towards the dissolved phase in the water column relative to the '90s. Our results highlight the important contribution of the Scheldt estuary for the Hg budget in North Sea coastal waters, as well as the need for seasonal monitoring of all Hg species.
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Affiliation(s)
- Vincent Perrot
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Tianhui Ma
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Delphine Vandeputte
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Vendula Smolikova
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Arne Bratkic
- Universitat de Lleida, Chemistry Department, Environmental Physical Chemistry group, Av. Rovira Roure 191, 25198 Lleida, Spain
| | - Martine Leermakers
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Willy Baeyens
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium
| | - Yue Gao
- Vrije Universiteit Brussel (VUB), Analytical and Environmental Geochemistry (AMGC), Pleinlaan 2, Ixelles 1050, Belgium.
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23
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von Hellfeld R, Gade C, Koppel DJ, Walters WJ, Kho F, Hastings A. An approach to assess potential environmental mercury release, food web bioaccumulation, and human dietary methylmercury uptake from decommissioning offshore oil and gas infrastructure. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131298. [PMID: 36996541 DOI: 10.1016/j.jhazmat.2023.131298] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/03/2023] [Accepted: 03/24/2023] [Indexed: 05/03/2023]
Abstract
Subsea pipelines carrying well fluids from hydrocarbon fields accumulate mercury. If the pipelines (after cleaning and flushing) are abandoned in situ, their degradation may release residual mercury into the environment. To justify pipeline abandonment, decommissioning plans include environmental risk assessments to determine the potential risk of environmental mercury. These risks are informed by environmental quality guideline values (EQGVs) governing concentrations in sediment or water above which mercury toxicity may occur. However, these guidelines may not consider e.g., the bioaccumulation potential of methylated mercury. Therefore, EQGVs may not protect humans from exposure if applied as the sole basis for risk assessments. This paper outlines a process to assess the EQGVs' protectiveness from mercury bioaccumulation, providing preliminary insights to questions including how to (1) determine pipeline threshold concentrations, (2) model marine mercury bioaccumulation, and (3) determine exceedance of the methylmercury tolerable weekly intake (TWI) for humans. The approach is demonstrated with a generic example using simplifications to describe mercury behaviour and a model food web. In this example, release scenarios equivalent to the EQGVs resulted in increased marine organism mercury tissue concentrations by 0-33 %, with human dietary methylmercury intake increasing 0-21 %. This suggests that existing guidelines may not be protective of biomagnification in all circumstances. The outlined approach could inform environmental risk assessments for asset-specific release scenarios but must be parameterised to reflect local environmental conditions when tailored to local factors.
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Affiliation(s)
- Rebecca von Hellfeld
- School of Biological Sciences, University of Aberdeen, School of Biological Sciences, Aberdeen, UK; National Decommissioning Centre, Ellon, UK.
| | - Christoph Gade
- School of Biological Sciences, University of Aberdeen, School of Biological Sciences, Aberdeen, UK; National Decommissioning Centre, Ellon, UK
| | - Darren J Koppel
- Curtin Oil and Gas Innovation Centre, Faculty of Science and Engineering, Curtin University, Perth, WA, Australia; Australian Institute of Marine Science, Perth, Australia
| | - William J Walters
- Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, PA, USA
| | - Fenny Kho
- Curtin Oil and Gas Innovation Centre, Faculty of Science and Engineering, Curtin University, Perth, WA, Australia; Curtin Corrosion Centre, Curtin University, Perth, WA, Australia
| | - Astley Hastings
- School of Biological Sciences, University of Aberdeen, School of Biological Sciences, Aberdeen, UK; National Decommissioning Centre, Ellon, UK
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24
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Rodríguez-Viso P, Domene A, Sánchez A, Vélez D, Monedero V, Devesa V, Zúñiga M. Challenges and strategies for preventing intestinal damage associated to mercury dietary exposure. Toxicology 2023; 494:153580. [PMID: 37328091 DOI: 10.1016/j.tox.2023.153580] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/02/2023] [Accepted: 06/12/2023] [Indexed: 06/18/2023]
Abstract
Food represents the major risk factor for exposure to mercury in most human populations. Therefore, passage through the gastrointestinal tract plays a fundamental role in its entry into the organism. Despite the intense research carried out on the toxicity of Hg, the effects at the intestinal level have received increased attention only recently. In this review we first provide a critical appraisal of the recent advances on the toxic effects of Hg at the intestinal epithelium. Next, dietary strategies aimed to diminish Hg bioavailability or modulate the epithelial and microbiota responses will be revised. Food components and additives, including probiotics, will be considered. Finally, limitations of current approaches to tackle this problem and future lines of research will be discussed.
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Affiliation(s)
| | - Adrián Domene
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Alicia Sánchez
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Dinoraz Vélez
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Vicente Monedero
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Vicenta Devesa
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Manuel Zúñiga
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain.
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25
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Yildiz H, Bayrakli B, Altuntas M, Celik I. Metal concentrations, selenium-mercury balance, and potential health risk assessment for consumer of whiting (Merlangius merlangus euxinus L., 1758) from different regions of the southern Black Sea. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:65059-65073. [PMID: 37074608 DOI: 10.1007/s11356-023-26511-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 03/13/2023] [Indexed: 05/03/2023]
Abstract
The significant increase in the human population and the associated industrial wastes have a widespread impact on coastal areas. It is important to monitor trace elements that affect food safety and pose a potential consumer health threat. All over the Black Sea coast, people enjoy consuming whiting as both meat and roe. In February 2021, whitings were caught by bottom trawling from four different locations on the coasts of Kastamonu, Sinop (Sarıkum, Adabaşı), and Samsun in the southern Black Sea region. The meat and roe extracts obtained from whiting samples were analyzed through an optical emission spectrophotometer (ICP-MS). Trace element concentrations of whiting meat and roe in this study were Zn > Fe > Sr > As > Al > Se > B > Mn > Cu > Hg > Li > Ni > Ba > Pb > Cr > Cd and Zn > Fe > Al > As > Cu > Sr > Mn > Se > B > Ba > Li > Ni > Hg > Cr > Pb > Cd, respectively. These amounts were lower than the acceptable values accepted by the EU Commission. In case of whiting and roe consumption of a maximum of three portions (860.33 g) for Adabaşı, six portions for Kastamonu (1432.37 g), three portions for Samsun (828.55 g), and five portions (1253.04 g) for Sarıkum per month do not pose a health risk.
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Affiliation(s)
- Harun Yildiz
- Vocational School, Yaolva University, Yalova, Turkey
| | - Barış Bayrakli
- Vocational School, Sinop University, 57000, Sinop, Turkey.
| | - Mutlu Altuntas
- Department of Statistics, Faculty of Arts and Science, Sinop University, 57000, Sinop, Turkey
| | - Ihsan Celik
- Aquaculture of Department, Faculty of Fisheries, Mersin University, Mersin, Turkey
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26
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Bottini CLJ, MacDougall-Shackleton SA. Methylmercury effects on avian brains. Neurotoxicology 2023; 96:140-153. [PMID: 37059311 DOI: 10.1016/j.neuro.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 04/03/2023] [Accepted: 04/11/2023] [Indexed: 04/16/2023]
Abstract
Methylmercury (MeHg) is a concerning contaminant due to its ubiquity and harmful effects on organisms. Although birds are important models in the neurobiology of vocal learning and adult neuroplasticity, the neurotoxic effects of MeHg are less understood in birds than mammals. We surveyed the literature on MeHg effects on biochemical changes in the avian brain. Publication rates of papers related to neurology and/or birds and/or MeHg increased with time and can be linked with historical events, regulations, and increased understanding of MeHg cycling in the environment. However, publications on MeHg effects on the avian brain remain relatively low across time. The neural effects measured to evaluate MeHg neurotoxicity in birds changed with time and researcher interest. The measures most consistently affected by MeHg exposure in birds were markers of oxidative stress. NMDA, acetylcholinesterase, and Purkinje cells also seem sensitive to some extent. MeHg exposure has the potential to affect most neurotransmitter systems but more studies are needed for validation in birds. We also review the main mechanisms of MeHg-induced neurotoxicity in mammals and compare it to what is known in birds. The literature on MeHg effects on the avian brain is limited, preventing full construction of an adverse outcome pathway. We identify research gaps for taxonomic groups such as songbirds, and age- and life-stage groups such as immature fledgling stage and adult non-reproductive life stage. In addition, results are often inconsistent between experimental and field studies. We conclude that future neurotoxicological studies of MeHg impacts on birds need to better connect the numerous aspects of exposure from molecular physiological effects to behavioural outcomes that would be ecologically or biologically relevant for birds, especially under challenging conditions.
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Affiliation(s)
- Claire L J Bottini
- University of Western Ontario, Department of Biology, 1151 Richmond St., London Ontario, N6A 5B7; Advanced Facility for Avian Research, University of Western Ontario, London, Ontario, Canada.
| | - Scott A MacDougall-Shackleton
- Advanced Facility for Avian Research, University of Western Ontario, London, Ontario, Canada; University of Western Ontario, Department of Psychology, 1151 Richmond St., London Ontario, N6A 5C2
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27
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Elfidasari D, Rijal MS, Shalsabilla SE, Rahma Fadila DS, Cici A, Pikoli MR, Tetriana D, Sugoro I. Intestinal bacteria diversity of suckermouth catfish (Pterygoplichthys pardalis) in the Cd, Hg, and Pb contaminated Ciliwung River, Indonesia. Heliyon 2023; 9:e14842. [PMID: 37025814 PMCID: PMC10070546 DOI: 10.1016/j.heliyon.2023.e14842] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/10/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023] Open
Abstract
The contamination of aquatic environments with heavy metals poses a serious threat to fish, potentially leading to diseases or even death. Therefore, there is an urgent need for studies to investigate the adaptability of fish in heavy metal-contaminated environments. Several studies have explored the adaptability of suckermouth catfish (P. pardalis) to survive in the contaminated Ciliwung River. The findings obtained showed that the presence of intestinal bacteria helped these fish overcome the heavy metals in their intestines, thereby enabling the fish to survive. Analysis using the Next Generation Sequencing (NGS) technology has succeeded in identifying diversity of these bacteria in P. pardalis living in the Ciliwung River, which contaminated with Cd (0.3-1.6 ppm in the water & 0.9-1.6 ppm in the sediment), Hg (0.6-2 ppm in the water & 0.6-1.8 ppm in the sediment), and Pb (59.9-73.8 ppm in the water & 26.1-58.6 ppm in the sediment). Diversity index of intestinal bacteria in P. pardalis was relatively high, but it had a negative correlation with the presence of these contaminants. Actinobacteria, Firmicutes, and Proteobacteria were abundant in the intestines of P. pardalis from the upstream to downstream of the river, with an overall abundance range of 15-48%. Furthermore, Mycobacterium along with 6 other genera were identified as core intestinal bacteria. The presence of these bacterial communities in all the samples affected their survival in heavy metals-contaminated rivers. The fish's adaptability to live in this harsh environment indicated that it has the potential to be utilized as a bioremediator of heavy metals in river sediments.
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Affiliation(s)
- Dewi Elfidasari
- Department of Biology, Faculty of Science and Technology, Al Azhar University Indonesia, Jakarta 12110, Indonesia
| | - Mohammad Syamsul Rijal
- Department of Biology, Faculty of Science and Technology, UIN Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
| | - Syalwa Ersadiwi Shalsabilla
- Department of Biology, Faculty of Science and Technology, UIN Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
| | - Diannisa Syahwa Rahma Fadila
- Department of Biology, Faculty of Science and Technology, UIN Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
| | - Ade Cici
- Department of Biology, Faculty of Science and Technology, UIN Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
| | - Megga Ratnasari Pikoli
- Department of Biology, Faculty of Science and Technology, UIN Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
| | - Devita Tetriana
- National Research and Innovation Agency (BRIN), Jakarta 12440, Indonesia
| | - Irawan Sugoro
- National Research and Innovation Agency (BRIN), Jakarta 12440, Indonesia
- Corresponding author.
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28
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Xu W, Park SK, Gruninger SE, Charles S, Franzblau A, Basu N, Goodrich JM. Associations between mercury exposure with blood pressure and lipid levels: A cross-sectional study of dental professionals. ENVIRONMENTAL RESEARCH 2023; 220:115229. [PMID: 36610536 PMCID: PMC10173801 DOI: 10.1016/j.envres.2023.115229] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/15/2022] [Accepted: 01/03/2023] [Indexed: 05/14/2023]
Abstract
Mercury (Hg) exposure is a public health problem worldwide that is now being addressed through the Minamata Convention on Mercury. Fish containing methylmercury and dental amalgam containing elemental Hg are the major sources of exposure for most populations. There is some evidence that methylmercury impacts cardiovascular and metabolic health, primarily in populations with high exposure levels. Studies of elemental Hg and these outcomes are relatively rare. We aimed to examine associations between Hg exposure (both elemental and methylmercury) and blood pressure, as well as cholesterol and triglyceride levels. In 2012, we recruited dental professionals attending the Health Screening Program at the American Dental Association (ADA) Annual Session in California. Total Hg levels in hair and blood samples were analyzed as indicators of methylmercury exposure and in urine as an indicator of primarily elemental Hg exposure (n = 386; mean ± sd age 55 ± 11 years). We measured blood pressure (systolic and diastolic) and lipid profiles (total cholesterol, high-density lipoprotein cholesterol [HDL], low-density lipoprotein cholesterol [LDL] and triglycerides). The geometric means (geometric standard deviations) for blood, hair, and urine Hg were 3.64 (2.39) μg/L, 0.60 (2.91) μg/g, and 1.30 (2.44) μg/L, respectively. For every one μg/L increase in specific gravity-adjusted urine Hg, LDL increased by 2.31 mg/dL (95% CI = 0.09, 4.54), in linear regression adjusting for BMI, race, sex, polyunsaturated fatty acid intake from fish consumption, smoking status, and use of cholesterol-lowering medication. No significant associations between Hg biomarkers and blood pressure or hair or blood Hg with lipid levels were observed. Results suggest that elemental Hg exposure may influence LDL concentrations in adults with low-level exposure, and this relationship merits further study in other populations.
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Affiliation(s)
- Weiya Xu
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Sung Kyun Park
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | | | - Simone Charles
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Alfred Franzblau
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Niladri Basu
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA; Faculty of Agriculture and Environmental Sciences, McGill University, Montreal, Quebec, Canada
| | - Jaclyn M Goodrich
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA.
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Kojima LV, Tuberville TD, Parrott BB. Integrating Mercury Concentrations in American Alligators (Alligator mississippiensis) with Hunter Consumption Surveys to Estimate Exposure Risk. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2023; 42:525-534. [PMID: 36636863 PMCID: PMC10107320 DOI: 10.1002/etc.5524] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/13/2022] [Accepted: 11/07/2022] [Indexed: 06/17/2023]
Abstract
Mercury is a naturally occurring element but is also considered a widespread contaminant due to global anthropogenic activity. Even in moderate amounts, mercury (Hg) is an established neurotoxin and is associated with a range of adverse outcomes both in humans and wildlife. Humans in the United States are most commonly exposed to Hg through contaminated food or drinking water, and the consumption of game species, particularly those occupying higher trophic levels, has the potential to expose hunters to high concentrations of Hg. In the present study, we determined Hg concentrations in tail muscle and blood from American alligators (Alligator mississippiensis) inhabiting a region (Savannah River Site, SC, USA) with known Hg contamination. We then integrated these data with alligator harvest records and previously published surveys of alligator meat consumption patterns to estimate potential exposure risk. We found that the average Hg concentrations in tail muscle (1.34 mg/kg, wet wt) from sampled alligators exceeded the recommended threshold for Hg exposure based on the World Health Organization's guidelines (0.5 mg/kg, wet wt). In addition, based on regional consumption patterns reported for both adults and children, we estimated Hg exposures ( x ¯ Adult = 0.419 µg/kg/day, x ¯ Child = 2.24 µg/kg/day) occurring well above the US Environmental Protection Agency methylmercury reference dose of 0.1 μg/kg/day. Although the two reservoirs sampled in the present study are not currently open to alligator hunting, they are connected to waters that are publicly accessible, and the extent of alligator mobility across these sites is not known. Together, the findings reported in the present study further demonstrate the need for active monitoring of Hg concentrations in game species, which can convey substantial exposure risks to the public. Environ Toxicol Chem 2023;42:525-534. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Laura V. Kojima
- Savannah River Ecology LaboratoryUniversity of GeorgiaAikenSouth CarolinaUSA
- Eugene P. Odum School of EcologyUniversity of GeorgiaAthensGeorgiaUSA
| | - Tracey D. Tuberville
- Savannah River Ecology LaboratoryUniversity of GeorgiaAikenSouth CarolinaUSA
- Warnell School of Forestry and Natural ResourcesUniversity of GeorgiaAthensGeorgiaUSA
| | - Benjamin B. Parrott
- Savannah River Ecology LaboratoryUniversity of GeorgiaAikenSouth CarolinaUSA
- Eugene P. Odum School of EcologyUniversity of GeorgiaAthensGeorgiaUSA
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Feng H, Cheng J. Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil-A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:1869. [PMID: 36767236 PMCID: PMC9914875 DOI: 10.3390/ijerph20031869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Reducing the mobility and bioavailability of heavy metals in soils by adding exogenous materials is a technology for remediating soils contaminated with heavy metals. Unlike industrial sites, the use of such techniques in agricultural soils requires consideration of not only reducing the mobility of heavy metals but also avoiding adverse effects on soil fertility and the growth of plants. Due to the uncertainty of the stability of amendments applied to agricultural soil, the application of amendments in farmland soil is controversial. This article reviewed the field studies in which amendments were used to immobilize heavy metals, and identified the potential environmental impacts of all aspects of soil amendment usage, including production and processing, transportation, storage, application to soil, long-term stability, and plant absorption. Results of the study indicated that after identifying the environmental risks of the whole process of the application of improvers in agricultural fields, it is necessary to classify the risks according to their characteristics, and design differentiated risk control measures for the safe application of this type of technology.
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Moslemi-Aqdam M, Low G, Low M, Laird BD, Branfireun BA, Swanson HK. Estimates, spatial variability, and environmental drivers of mercury biomagnification rates through lake food webs in the Canadian subarctic. ENVIRONMENTAL RESEARCH 2023; 217:114835. [PMID: 36400218 DOI: 10.1016/j.envres.2022.114835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/27/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Biomagnification of mercury (Hg) through lake food webs is understudied in rapidly changing northern regions, where wild-caught subsistence fish are critical to food security. We investigated estimates and among-lake variability of Hg biomagnification rates (BMR), relationships between Hg BMR and Hg levels in subsistence fish, and environmental drivers of Hg BMR in ten remote subarctic lakes in Northwest Territories, Canada. Lake-specific linear regressions between Hg concentrations (total Hg ([THg]) in fish and methyl Hg ([MeHg]) in primary consumers) and baseline-adjusted δ15N ratios were significant (p < 0.001, r2 = 0.58-0.88), indicating biomagnification of Hg through food webs of all studied lakes. Quantified using the slope of Hg-δ15N regressions, Hg BMR ranged from 0.16 to 0.25, with mean ± standard deviation of 0.20 ± 0.03). Using fish [MeHg] rather than [THg] lowered estimates of Hg BMR by ∼10%, suggesting that the use of [THg] as a proxy for [MeHg] in fish can influence estimates of Hg BMR. Among-lake variability of size-standardized [THg] in resident fish species from different trophic guilds, namely Lake Whitefish (Coregonus clupeaformis) and Northern Pike (Esox lucius), was not significantly explained by among-lake variability in Hg BMR. Stepwise multiple regressions indicated that among-lake variability of Hg BMR was best explained by a positive relationship with catchment forest cover (p = 0.009, r2 = 0.59), likely reflecting effects of forest cover on water chemistry of downstream lakes and ultimately, concentrations of biomagnifying MeHg (and percent MeHg of total Hg) in resident biota. These findings improve our understanding of Hg biomagnification in remote subarctic lakes.
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Affiliation(s)
| | - George Low
- Dehcho Aboriginal Aquatic Resources & Oceans Management, Hay River, NT, Canada
| | - Mike Low
- Dehcho Aboriginal Aquatic Resources & Oceans Management, Hay River, NT, Canada
| | - Brian D Laird
- School of Public Health Sciences, University of Waterloo, Waterloo, ON, Canada
| | | | - Heidi K Swanson
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
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Rodrigues ET, Coelho JP, Pereira E, Pardal MA. Are mercury levels in fishery products appropriate to ensure low risk to high fish-consumption populations? MARINE POLLUTION BULLETIN 2023; 186:114464. [PMID: 36502771 DOI: 10.1016/j.marpolbul.2022.114464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
The main goal of the present study is to determine the sources of methylmercury (MeHg) for high fish-consumption populations with the Portuguese population as showcase, as Portugal is the EU country with the highest fish consumption per capita (2019: 59.91 kg year-1). Since limited information is available on the effective levels of mercury after culinary treatments, cooked and raw codfish (Gadus morhua), hake (Merluccius merluccius), octopus (Octopus vulgaris), horse mackerel (Trachurus trachurus) and sardine (Sardina pilchardus) were considered. The mercury concentration ranking Hake > Horse mackerel > Codfish > Octopus > Sardine was observed in all situations (cooked and raw samples) for both MeHg and total mercury (T-Hg). The gathered results reinforce the general assumption that the loss of moisture during cooking increases MeHg and T-Hg concentrations in fish, but the idea that MeHg in fish muscle tissue represents the bulk of T-Hg cannot be generalised, as our study determined a MeHg/T-Hg ratio of 0.43 for grilled sardines.
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Affiliation(s)
- Elsa T Rodrigues
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
| | - João P Coelho
- Department of Biology and CESAM and ECOMARE, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Eduarda Pereira
- Department of Chemistry and CESAM/REQUIMTE, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Miguel A Pardal
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
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Huang ZL, Yang ZB, Xu XX, Lei YJ, He JS, Yang S, Wong MH, Man YB, Cheng Z. Health risk assessment of mercury in Nile tilapia (Oreochromis niloticus) fed housefly maggots. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158164. [PMID: 36055489 DOI: 10.1016/j.scitotenv.2022.158164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/04/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
The bioaccumulation of total mercury (THg) and methylmercury (MeHg) by housefly maggots (HM) during the conversion of food waste (vegetables and meat (VM) and rice waste) under various waste feed ratios were investigated. Subsequently, Nile tilapia (Oreochromis niloticus) were fed with the commercial feed, commercial dried HM, dried HM, and fresh HM, followed by a human health risk assessment of Hg via fish consumption. The THg concentrations of HM fed with food waste ranged from 39.5 to 100 μg kg-1 ww. Concentrations of MeHg in the maggots fed with 100 % vegetables and meat (VM) waste (13.7 ± 1.12 μg kg-1 ww) was significantly higher than that fed with other mixed ratios of rice waste and VM waste (p<0.05). Concentrations of MeHg were positively correlated with the weight and lipid content of houseflies (p<0.05). THg and MeHg concentrations in tilapia fed with the converted HM (dried and fresh HM) were 22.5 ± 6.50 μg kg-1 ww and 2.43 ± 0.36 μg kg-1 ww, respectively. There was no significant difference in MeHg between tilapia fed the four experiment diets (p>0.05). Health risk assessment results indicated that mercury in tilapia fed the food waste-grown HM did not pose potential health risks to humans (target hazard quotient < 1). In conclusion, HM could convert food waste into high-quality and safe fish feeds for cultivating tilapia.
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Affiliation(s)
- Zhong-Li Huang
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Zhan-Biao Yang
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Xun Xu
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Yong-Jia Lei
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Jin-Song He
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Song Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Ming Hung Wong
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Yu-Bon Man
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China.
| | - Zhang Cheng
- College of Environment, Sichuan Agricultural University, Chengdu, China.
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Jonsson S, Mastromonaco MN, Wang F, Bravo AG, Cairns WRL, Chételat J, Douglas TA, Lescord G, Ukonmaanaho L, Heimbürger-Boavida LE. Arctic methylmercury cycling. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:157445. [PMID: 35882324 DOI: 10.1016/j.scitotenv.2022.157445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
Anthropogenic mercury (Hg) undergoes long-range transport to the Arctic where some of it is transformed into methylmercury (MeHg), potentially leading to high exposure in some Arctic inhabitants and wildlife. The environmental exposure of Hg is determined not just by the amount of Hg entering the Arctic, but also by biogeochemical and ecological processes occurring in the Arctic. These processes affect MeHg uptake in biota by regulating the bioavailability, methylation and demethylation, bioaccumulation and biomagnification of MeHg in Arctic ecosystems. Here, we present a new budget for pools and fluxes of MeHg in the Arctic and review the scientific advances made in the last decade on processes leading to environmental exposure to Hg. Methylation and demethylation are key processes controlling the pool of MeHg available for bioaccumulation. Methylation of Hg occurs in diverse Arctic environments including permafrost, sediments and the ocean water column, and is primarily a process carried out by microorganisms. While microorganisms carrying the hgcAB gene pair (responsible for Hg methylation) have been identified in Arctic soils and thawing permafrost, the formation pathway of MeHg in oxic marine waters remains less clear. Hotspots for methylation of Hg in terrestrial environments include thermokarst wetlands, ponds and lakes. The shallow sub-surface enrichment of MeHg in the Arctic Ocean, in comparison to other marine systems, is a possible explanation for high MeHg concentrations in some Arctic biota. Bioconcentration of aqueous MeHg in bacteria and algae is a critical step in the transfer of Hg to top predators, which may be dampened or enhanced by the presence of organic matter. Variable trophic position has an important influence on MeHg concentrations among populations of top predator species such as ringed seal and polar bears distributed across the circumpolar Arctic. These scientific advances highlight key processes that affect the fate of anthropogenic Hg deposited to Arctic environments.
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Affiliation(s)
- Sofi Jonsson
- Department of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden.
| | | | - Feiyue Wang
- Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Andrea G Bravo
- Department of Marine Biology and Oceanography, Institut de Ciències del Mar (ICM-CSIC), Barcelona, Spain
| | - Warren R L Cairns
- CNR Institute of Polar Sciences and Ca' Foscari University, Venice, Italy
| | - John Chételat
- Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa, ON, Canada
| | - Thomas A Douglas
- U.S. Army Cold Regions Research and Engineering Laboratory, Fort Wainwright, AK, USA
| | - Gretchen Lescord
- Wildlife Conservation Society Canada and Laurentian University, Vale Living with Lakes Center, Sudbury, Ontario, Canada
| | - Liisa Ukonmaanaho
- Natural Resources Institute Finland (Luke), P.O. Box 2, FI-00791 Helsinki, Finland
| | - Lars-Eric Heimbürger-Boavida
- CNRS/INSU,Aix Marseille Université,Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO), Marseille, France
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Lin H, Li M, Zhu Y, Lan W, Feng Q, Ding S, Li T, Wang Y, Duan Y, Wei J, Li M. Development and validation of the DGT technique using the novel cryogel for measuring dissolved Hg(II) in the estuary. MARINE ENVIRONMENTAL RESEARCH 2022; 182:105773. [PMID: 36283212 DOI: 10.1016/j.marenvres.2022.105773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/08/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
The complex seawater matrix has significantly influenced the determination of estuarine dissolved Hg(II), hindering its monitoring and risk assessment in maricultural areas. In this work, SiO2-SH-DGT assembled by the sulfhydryl-modified silica cryogel (SiO2-SH cryogel) as the novel binding phase was developed to tackle this problem. The uniform dispersion of the cryogel into binding gel was advantageous for achieving remarkable and comparable capacity, which endowed the estimated diffusion coefficient (D) to be 1.39-3.08 times of the existing research. The SiO2-SH-DGT performance was independent of pH (3-9), ionic strength (10-800 mM), fulvic acid at low content, and seawater matrix (Na+, K+, Ca2+, Cl-), but the high content of Mg2+ did interfere with the Hg(II) accumulation, which manifested as competitive adsorption and diffusion. Therefore, the calibrated model was established by calibrating accumulated mass (M') and diffusion coefficient (D') based on the Mg2+ concentration, its high accuracy was further verified in the lab. Finally, SiO2-SH-DGT was deployed in the three typical aquaculture areas in Beibu Gulf, field trials achieved the actual Hg(II) level to be 1.52-5.38 ng/L with consideration of the diffusion boundary layer. The finding could provide new thought and technical support for metal pollution monitoring in estuary maricultural areas.
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Affiliation(s)
- Haiying Lin
- School of Resources, Environment and Materials, Guangxi University, Nanning, China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning, China.
| | - Mingzhi Li
- School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Yifan Zhu
- School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Wenlu Lan
- Marine Environmental Monitoring Centre of Guangxi, Beihai, China
| | - Qingge Feng
- School of Resources, Environment and Materials, Guangxi University, Nanning, China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning, China
| | - Shiming Ding
- Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing, China
| | - Tianshen Li
- Marine Environmental Monitoring Centre of Guangxi, Beihai, China
| | - Yan Wang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| | - Yu Duan
- School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Junqi Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning, China
| | - Mingen Li
- School of Resources, Environment and Materials, Guangxi University, Nanning, China
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Sorokina T, Sobolev N, Belova N, Aksenov A, Kotsur D, Trofimova A, Varakina Y, Grjibovski AM, Chashchin V, Korobitsyna R, Thomassen Y. Diet and Blood Concentrations of Essential and Non-Essential Elements among Rural Residents in Arctic Russia. Nutrients 2022; 14:nu14235005. [PMID: 36501035 PMCID: PMC9738226 DOI: 10.3390/nu14235005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/17/2022] [Accepted: 11/20/2022] [Indexed: 11/26/2022] Open
Abstract
Nutrition is an essential factor for human health. Earlier research has suggested that Arctic residents are vulnerable to environmental toxic exposures through traditional foods. Although Russia is the largest Arctic country, the evidence on the topic from the Russian part of the Arctic is scarce. We studied associations between blood concentrations of essential and non-essential elements and traditional food consumption in 297 adults from seven rural settlements in the Nenets Autonomous Area, Northwest Russia. Blood arsenic concentration was positively associated with consumption of rainbow smelt, pink salmon, Arctic char and navaga fish. Frequent consumption of northern pike was associated with increased concentration of blood mercury. Blood mercury and arsenic concentrations were significantly associated with blood selenium. We also observed positive associations between blood lead levels and the frequency of goose consumption. Moreover, subjects who reported to be hunters had higher blood levels of lead, suggesting contamination of goose meat with fragments of shotgun shells. Blood cobalt and manganese concentrations were inversely associated with serum ferritin levels. Positive associations between blood levels of manganese and lead were observed. Moreover, blood lead concentrations were significantly associated with cadmium, mercury, copper, and zinc. Our results corroborate earlier findings on the traditional foods as source of non-essential elements for the Arctic residents. Observed correlations between the levels of lead and other elements warrant further research and may have potential implications for the studies on the associations between essential elements and health outcomes.
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Affiliation(s)
- Tatiana Sorokina
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- Correspondence:
| | - Nikita Sobolev
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
| | - Natalia Belova
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- Central Scientific Research Laboratory, Northern State Medical University, Troitskiy Ave., 51, 163000 Arkhangelsk, Russia
| | - Andrey Aksenov
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
| | - Dmitriy Kotsur
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- N. Laverov Federal Center for Integrated Arctic Research, Ural Branch of the Russian Academy of Sciences, Naberezhnaya Severnoy Dvini 23, 163000 Arkhangelsk, Russia
| | - Anna Trofimova
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
| | - Yulia Varakina
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
| | - Andrej M. Grjibovski
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- Central Scientific Research Laboratory, Northern State Medical University, Troitskiy Ave., 51, 163000 Arkhangelsk, Russia
- Department of Epidemiology and Modern Vaccination Technologies, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
- Department of Health Policy and Management, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
- West Kazakhstan Marat Ospanov Medical University, Aktobe 030019, Kazakhstan
| | - Valerii Chashchin
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- Research Laboratory of Complex Problems of Hygiene and Epidemiology, North-Western State Medical University Named after I.I. Mechnikov, Kirochnaya ul. 41, 191015 Saint-Petersburg, Russia
- Institute of Ecology, National Research University Higher School of Economics, Myasnitskaya Str. 20, 101000 Moscow, Russia
| | - Rimma Korobitsyna
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
| | - Yngvar Thomassen
- Arctic Biomonitoring Laboratory, Northern (Arctic) Federal University Named after M. V. Lomonosov, Naberezhnaya Severnoy Dvini 17, 163002 Arkhangelsk, Russia
- Institute of Ecology, National Research University Higher School of Economics, Myasnitskaya Str. 20, 101000 Moscow, Russia
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Rational synthesis and characterization of highly water stable MOF@GO composite for efficient removal of mercury (Hg 2+) from water. Heliyon 2022; 8:e10936. [PMID: 36276714 PMCID: PMC9579000 DOI: 10.1016/j.heliyon.2022.e10936] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/25/2022] [Accepted: 09/29/2022] [Indexed: 11/23/2022] Open
Abstract
The present study is aimed at adsorptive removal of Mercury (Hg2+) using highly functionalized nanomaterials based on Graphene Oxide Zeolitic Imidazolate Framework composite (ZIF-67@GO). Solvothermal methodology was used to synthesize ZIF-67@GO composite. Synthesized compounds were confirmed by FTIR, SEM, PXRD and EDX analysis. The as-prepared ZIF-67@GO was tested as efficient adsorbent for effective removal of Mercury (Hg2+) from aquatic environment. The atomic adsorption spectrophotometer was used to monitor the process of adsorption of Hg+2 on ZIF-67@GO. From the adsorption data, the maximum removal efficiency achieved was 91.1% using 10 mg amount of composite for 50 mL using 20 ppm Mercury (Hg2+) solution. Different parameters like pH, contact time, concentration, adsorption kinetics and isotherm were also examined to explore adsorption process. Adsorption data fitted well for Freundlich Model having R2 value of 0.9925 than Langmuir Isotherm with R2 value of 0.9238. Kinetics were rapid and excellently described via 2nd order model with R2 = 0.99946 than 1st order model with R2 value of 0.8836. Freundlich and pseudo 2nd order models validated that multilayer chemisorption occurs during adsorption process due to the presence of highly functionalized sites on ZIF-67@GO composite. The synthesized composite material has shown excellent reusability. Thus, water stable ZIF-67@GO composites can efficiently be used for Mercury (Hg2+) confiscation from water.
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Johnston TA, Lescord GL, Quesnel M, Savage PL, Gunn JM, Kidd KA. Age, body size, growth and dietary habits: What are the key factors driving individual variability in mercury of lacustrine fishes in northern temperate lakes? ENVIRONMENTAL RESEARCH 2022; 213:113740. [PMID: 35750129 DOI: 10.1016/j.envres.2022.113740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/14/2022] [Accepted: 06/18/2022] [Indexed: 06/15/2023]
Abstract
Fish total mercury concentration ([THg]) has been linked to various fish attributes, but the relative importance of these attributes in accounting for among-individual variation in [THg] has not been thoroughly assessed. We compared the contributions of ontogeny (age, length), growth (growth rate, body condition), and food web position (δ13C, δ15N) to among-individual variability in [THg] within populations of seven common fishes from 141 north temperate lakes. Ontogenetic factors accounted for most variation in [THg]; age was a stronger and less variable predictor than length for most species. Adding both indices of growth and food web position to these models increased explained variation (R2) in [THg] by 6-25% among species. Fish [THg] at age increased with growth rate, while fish [THg] at length decreased with growth rate, and the effect of body condition was consistently negative. Trophic elevation (inferred from δ15N) was a stronger predictor than primary production source (inferred from δ13C) for piscivores but not benthivores. Fish [THg] increased with δ15N in all species but showed a more variable relationship with δ13C. Among-individual variation in [THg] is primarily related to age or size in most temperate freshwater fishes, and effects of growth rate and food web position need to be considered in the context of these ontogenetic drivers.
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Affiliation(s)
- Thomas A Johnston
- Ontario Ministry of Northern Development, Mines, Natural Resources and Forestry, Sudbury, ON, Canada.
| | - Gretchen L Lescord
- Biology Department, Laurentian University, Sudbury, ON, Canada; Wildlife Conservation Society Canada, Toronto, ON, Canada
| | | | | | - John M Gunn
- Biology Department, Laurentian University, Sudbury, ON, Canada
| | - Karen A Kidd
- Department of Biology, McMaster University, Hamilton, ON, Canada; School of Earth, Environment and Society, McMaster University, Hamilton, ON, Canada
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Yang XF, Yang SC, Wen FL, Feng L, Meng B, Hu HY, Wang BL, Li J, Poulain AJ, Li P. Impacts of Mercury Exposure Levels and Sources on the Demethylation of Methylmercury Through Human Gut Microbiota. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:534-541. [PMID: 35876846 DOI: 10.1007/s00128-022-03569-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
This study aims to investigate methylmercury (MeHg) demethylation processes in human gut. Here, we determined the compositions and MeHg demethylation rates of gut microbiota in residents from different Hg exposure levels (Wanshan (WS) town and Yangtou (YT) town) and different Hg exposure sources (Zhuchang (ZC) town and YT town) regions. MeHg and inorganic Hg exposure levels in residents of WS town were significantly higher than those of YT and ZC town. Desulfovibrio and Methanogens, which related to Hg methylation/demethylation, showed significantly higher abundance in WS and ZC, comparing with YT. In vitro experiments demonstrated that human intestinal microbiota could degrade MeHg directly. Besides, gut microbiota in WS and ZC exhibited significantly higher demethylation rates than YT, suggesting Desulfovibrio and Methanogens may play important roles in intestinal MeHg demethylation. This study highlights Hg exposure levels and sources may affect demethylation efficiency of gut microbiota, which provides new insights for MeHg demethylation processes in human body.
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Affiliation(s)
- Xian-Feng Yang
- School of Public Health, Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Shao-Chen Yang
- Hubei Key Laboratory of Critical Zone Evolution, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
| | - Fu-Li Wen
- School of Public Health, Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Lin Feng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
| | - Bo Meng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
| | - Hai-Yan Hu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
| | - Bao-Lin Wang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
| | - Jun Li
- School of Public Health, Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Alexandre J Poulain
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - Ping Li
- School of Public Health, Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China.
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China.
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de Vasconcellos ACS, Ferreira SRB, de Sousa CC, de Oliveira MW, de Oliveira Lima M, Basta PC. Health Risk Assessment Attributed to Consumption of Fish Contaminated with Mercury in the Rio Branco Basin, Roraima, Amazon, Brazil. TOXICS 2022; 10:516. [PMID: 36136481 PMCID: PMC9504189 DOI: 10.3390/toxics10090516] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/19/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study was to assess the health risk attributable to the consumption of mercury-contaminated fish for the urban and non-urban populations living in the Roraima state, Amazon, Brazil. Seventy-five fish specimens distributed across twenty different species, comprising four trophic levels (i.e., herbivore, omnivore, detritivore, and carnivore), were collected at four locations in the Branco River Basin. The fish samples were sent to the Toxicology Laboratory at Evandro Chagas Institute to determine the total-Hg levels by using the cold vapor atomic system (CVAAS). The total-Hg levels ranged from 0 to 3.159 µg/g. The average concentration in non-carnivorous species (n = 32) was 0.116 µg/g, and among carnivorous fish (n = 43), it was 0.869 µg/g. The weighted average of contamination levels for all samples was 0.545 µg/g. The health risk assessment was conducted according to the methodology proposed by the World Health Organization and different scenarios of human exposure were considered, based on three levels of fish consumption (low: 50 g/day; moderate: 100 g/day and high: 200 g/day). Women of childbearing age ingest 5 to 21 times more mercury than the dose considered safe by the U.S. EPA and intake a dose from 2 to 9 times higher than the safe dose proposed by FAO/WHO. Children under 5 years of age ingest from 18 to 75 times the dose proposed by the U.S. EPA and from 8 to 32 more mercury than the limit proposed by FAO/WHO. In summary, regardless of the level of fish consumption, type of residency (urban or non-urban), and the subset of the population analyzed, anyone who consumes fish from the locations sampled is at high risk attributable to mercury ingestion, with the only exception of adult men, who consume an average of 50 g of fish per day.
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Affiliation(s)
- Ana Claudia Santiago de Vasconcellos
- Laboratory of Professional Education on Health Surveillance, Joaquim Venâncio Polytechnic School of Health, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
| | - Sylvio Romério Briglia Ferreira
- Postgraduate Program in Natural Resources (Pronat), Federal University of Roraima, Campus Paricarana, Boa Vista 69310-000, RR, Brazil
| | | | | | - Marcelo de Oliveira Lima
- Environmental Section, Evandro Chagas Institute, Secretariat of Science, Technology and Strategic Products, Ministry of Health of Brazil, Belém 70723-040, PA, Brazil
| | - Paulo Cesar Basta
- Department of Endemic Diseases Samuel Pessoa, National School of Public Health Sergio Arouca, Oswaldo Cruz Foundation, Rio de Janeiro 21041-210, RJ, Brazil
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Vainio RK, Jormalainen V, Dietz R, Laaksonen T, Schulz R, Sonne C, Søndergaard J, Zubrod JP, Eulaers I. Trophic Dynamics of Mercury in the Baltic Archipelago Sea Food Web: The Impact of Ecological and Ecophysiological Traits. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11440-11448. [PMID: 35921287 PMCID: PMC9387095 DOI: 10.1021/acs.est.2c03846] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/22/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
We investigated trophic dynamics of Hg in the polluted Baltic Archipelago Sea using established trophic magnification (TMFs) and biomagnification factors (BMFs) on a comprehensive set of bird, fish, and invertebrate species. As different ecological and ecophysiological species traits may affect trophic dynamics, we explored the effect of food chain (benthic, pelagic, benthopelagic) and thermoregulatory strategy on trophic total Hg (THg) dynamics, using different approaches to accommodate benthopelagic species and normalize for trophic position (TP). We observed TMFs and most BMFs greater than 1, indicating overall THg biomagnification. We found significantly higher pelagic TMFs (3.58-4.02) compared to benthic ones (2.11-2.34) when the homeotherm bird species were excluded from models, but not when included. This difference between the benthic and pelagic TMFs remained regardless of how the TP of benthopelagic species was modeled, or whether TMFs were normalized for TP or not. TP-corrected BMFs showed a larger range (0.44-508) compared to BMFs representing predator-prey concentration ratios (0.05-82.2). Overall, the present study shows the importance of including and evaluating the effect of ecological and ecophysiological traits when investigating trophic contaminant dynamics.
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Affiliation(s)
- Riikka K. Vainio
- Department
of Biology, University of Turku, FI-20014 Turku, Finland
| | | | - Rune Dietz
- Department
of Ecoscience, Aarhus University, Frederiksborgvej 399, Postbox 358, DK-4000 Roskilde, Denmark
| | - Toni Laaksonen
- Department
of Biology, University of Turku, FI-20014 Turku, Finland
| | - Ralf Schulz
- iES
Landau, Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, DE-76829 Landau, Germany
| | - Christian Sonne
- Department
of Ecoscience, Aarhus University, Frederiksborgvej 399, Postbox 358, DK-4000 Roskilde, Denmark
| | - Jens Søndergaard
- Department
of Ecoscience, Aarhus University, Frederiksborgvej 399, Postbox 358, DK-4000 Roskilde, Denmark
| | - Jochen P. Zubrod
- iES
Landau, Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, DE-76829 Landau, Germany
- Zubrod
Environmental Data Science, Friesenstrasse 20, DE-76829, Landau, Germany
| | - Igor Eulaers
- Department
of Ecoscience, Aarhus University, Frederiksborgvej 399, Postbox 358, DK-4000 Roskilde, Denmark
- Norwegian
Polar Institute, FRAM Centre, Postboks 6606 Stakkevollan, NO-9296 Tromsø, Norway
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Basu N, Abass K, Dietz R, Krümmel E, Rautio A, Weihe P. The impact of mercury contamination on human health in the Arctic: A state of the science review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 831:154793. [PMID: 35341859 DOI: 10.1016/j.scitotenv.2022.154793] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/14/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
The 2021 Arctic Monitoring and Assessment Programme (AMAP) Mercury (Hg) Assessment is motivated by Arctic populations, and most notably Indigenous Peoples in the region, who are particularly vulnerable to Hg pollution. The objective of this review paper is to answer the following AMAP policy-relevant question: what is the human health impact of Hg pollution in the Arctic? In doing so, this state of the science review paper builds on information published 10 years ago in the last AMAP Hg assessment. The synthesized results demonstrate that: a) global influences (e.g., sources and transport pathways, biogeochemical processes, climate change, globalization) drive Hg exposures into human communities; b) Hg exposures are realized through dietary intake of certain country food items, and that new exposure science approaches are helping to deepen understandings; c) the nutritional and cultural benefits of country foods are immense, though a dietary transition is underway raising concerns over metabolic syndrome and broader issues of food security as well as cultural and social well-being; d) blood Hg measures are among the highest worldwide based on the results of human biomonitoring studies; e) Hg exposures are associated with adverse health outcomes across life stages (e.g., neurodevelopmental outcomes in young children to cardiovascular disease in adults); and f) risk communication needs to be balanced, targeted and clear, culturally appropriate, and be done collaboratively. These synthesized findings are particularly timely and policy-relevant given that the Minamata Convention entered into legal force worldwide in 2017 as a regulatory scheme to reduce the use and environmental release of Hg in order to protect human health and the environment. The Convention was influenced by health concerns raised by northern populations as indicated in the preamble text which makes reference to "the particular vulnerabilities of Arctic ecosystems and Indigenous communities".
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Affiliation(s)
- Niladri Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada.
| | - Khaled Abass
- Arctic Health, Faculty of Medicine, University of Oulu, Oulu, Finland; Department of Pesticides, Menoufia University, Menoufia, Egypt
| | - Rune Dietz
- Aarhus University, Arctic Research Centre (ARC), Department of Ecoscience, P.O. Box 358, Frederiksbirgvej 399, DK-4000 Roskilde, Denmark
| | - Eva Krümmel
- Inuit Circumpolar Council - Canada, Ottawa, Canada
| | - Arja Rautio
- Thule Institute and Faculty of Medicine, University of Oulu and University of the Arctic, Oulu, Finland
| | - Pal Weihe
- Department of Occupational Medicine and Public Health, Sigmundargøta 5, 100 Tórshavn, Faroe Islands; Center of Health Science, University of The Faroe Islands, J.C. Svabosgøta 14, 100 Tórshavn, Faroe Islands
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43
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Tian Q, Hong T, Zhao Z, Shi Z. Synthesis and application of a novel reactive Coumarin-derived probe for the determination of Hg2+ in real samples. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Wu Y, Zhang L, Ma F, Ding T, Obolda A. Synthesis of carbazole-based dendritic conjugated polymer: a dual channel optical probe for the detection of I - and Hg 2. Des Monomers Polym 2022; 25:184-196. [PMID: 35755880 PMCID: PMC9225711 DOI: 10.1080/15685551.2022.2088977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A new type of carbazole-based blue-emitting dendritic conjugated polymer, poly[(9,9-dioctyl)-2,7-fluorene-co-4,4’,4”-triphenylamine-co-9-(4-(9H-carbazol-9-yl)butyl)-3,6-carbazole](P), was successfully synthesized by Suzuki coupling reaction. Chemical structures of monomers and polymer were verified by FI-IR and 1HNMR characterizations. We found that polymer showed a special selectivity and high sensitivity for I−. With the addition of I−, the fluorescent polymer solution was obviously quenched. The polymer showed a special detection effect on I−. However, the fluorescent polymer was obviously restored when Hg2+ was added to the P/I− system due to the large complexation between I− and Hg2+. The anti-interference experiments of probe P/I− showed that other background cations have a slight influence on detecting Hg2+, and the calculated detection limit of Hg2+ reached 9.7 × 10−8 M, which could be a potential application for a two-channel cyclic detection of I− and Hg2+. Additionally, it was found that the theoretical values were in agreement with the experimental data.
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Affiliation(s)
- Yimin Wu
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Xinjiang, PR China
| | - Ling Zhang
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Xinjiang, PR China
| | - Fudong Ma
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Xinjiang, PR China
| | - Tao Ding
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Xinjiang, PR China
| | - Ablikim Obolda
- College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Xinjiang, PR China
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Pu Y, Guo J, Yang H, Zhong L, Tian H, Deng H, Duan X, Liu S, Chen D. Environmentally relevant concentrations of mercury inhibit the growth of juvenile silver carp (Hypophthalmichthys molitrix): Oxidative stress and GH/IGF axis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 236:113484. [PMID: 35421826 DOI: 10.1016/j.ecoenv.2022.113484] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/21/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
Mercury (Hg) is a global environmental contaminant, and excessive mercury levels in water can adversely affect the growth of fish. Silver carp (Hypophthalmichthys molitrix) is one of the important freshwater aquaculture fish in China, and its natural resources have been critically declining. However, the effects of Hg2+ exposure on the growth hormone/insulin-like growth factor (GH/IGF) axis and its toxic mechanism are still unclear. In this study, we systematically evaluated the bioaccumulation, histomorphology, antioxidant status, hormone levels, and GH/IGF axis toxicity of juvenile silver carp after exposure to environmental-related concentrations of Hg2+ (0, 0.05, 0.5, 5, and 50 µg/L) for 28 days. Results showed that the Hg2+ bioaccumulation in the liver increased with a rise in Hg2+ concentration and time of exposure. The body length (BL), body weight (BW), weight growth rate (WGR) and specific growth rate (SGR) all decreased after Hg2+ exposure. The serum levels of growth hormones (GH and IGF) and thyroid hormones (T3 and T4) were significantly decreased, and the expressions of GH/IGF axis-related genes were significantly downregulated after 7, 14, and 28 days of Hg2+ exposure. Correlations between the growth parameters and growth hormones or expression of genes in GH/IGF axis further suggested that environmentally relevant concentrations of Hg2+ could have adverse effects on growth. In addition, with increasing Hg2+ exposure, superoxide activities of dismutase (SOD), catalase (CAT), and glutathione S-transferase (GST)and levels of reduced glutathione (GSH) and malondialdehyde (MDA) were significantly increased, whereas the activity of glutathione peroxidase (GPx) significantly decreased and oxidative stress-related gene significantly changed. Liver lesions were mainly characterized by inflammatory cell infiltration, hepatocyte necrosis and fat vacuolation after exposure to Hg2+. Taken together, the results indicate that Hg2+ exposure leads to growth inhibition and oxidative stress in juvenile silver.
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Affiliation(s)
- Yan Pu
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China; Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Jie Guo
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Hao Yang
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China; Fisheries and Aquaculture Biotechnology Laboratory, College of Fisheries, Southwest University, Chongqing 400715, China
| | - Liqiao Zhong
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Huiwu Tian
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Huatang Deng
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Xinbin Duan
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Shaoping Liu
- Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China
| | - Daqing Chen
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China; Fishery Resources and Environmental Science Experimental Station of The Upper-Middle Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan 430223, China.
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46
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Chandia C, Salamanca M, Hernández A, Urrutia R. Sediment mercury concentration changes as a response to increased industrial activity in Coronel Bay, Chile. MARINE POLLUTION BULLETIN 2022; 178:113630. [PMID: 35405485 DOI: 10.1016/j.marpolbul.2022.113630] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Among the main sources of atmospheric mercury emissions are thermoelectric plants that use coal to generate electricity. This heavy metal is transported by air from its origin to neighboring coastal areas, where it is deposited in the sediment record. This research evaluated the content and temporal distribution of Hg in the coastal sediments of Central Chile, Coronel Bay, industrialized zone with two operative thermoelectric plants, and Coliumo Bay, reference zone free of industry. To this end, sediment cores from the centers of the two bays were obtained. Laboratory results show that the greatest Hg contents were found in the surface strata of the Coronel Bay core, with concentrations up to an order of magnitude greater than those obtained in the same strata in Coliumo Bay. This increase in Hg concentration coincides with the beginning of industrial activity in Coronel, with greater concentrations observed from 2012 on, the year in which the industrial operation of two coal-fired thermoelectric plants on the bay began. Based on 210Pb activity and the relationships between Hg content and organic matter, it was established that the main pathway of Hg to sediment is atmospheric deposition, while Coliumo presented inputs that reflect local non anthropogenic sources.
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Affiliation(s)
- Cristian Chandia
- Programa de Doctorado en Ciencias Ambientales, Universidad de Concepción, Chile; Laboratorio de Oceanografía Química (LOQ), Universidad de Concepción, Chile.
| | - Marco Salamanca
- Laboratorio de Oceanografía Química (LOQ), Universidad de Concepción, Chile
| | - Aldo Hernández
- Centro de Investigación en Recursos Naturales, Holon SpA., Concepción, Chile
| | - Roberto Urrutia
- Facultad de Ciencias Ambientales y Centro-EULA, Universidad de Concepción, Chile
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Cossa D, Knoery J, Bănaru D, Harmelin-Vivien M, Sonke JE, Hedgecock IM, Bravo AG, Rosati G, Canu D, Horvat M, Sprovieri F, Pirrone N, Heimbürger-Boavida LE. Mediterranean Mercury Assessment 2022: An Updated Budget, Health Consequences, and Research Perspectives. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3840-3862. [PMID: 35244390 DOI: 10.1021/acs.est.1c03044] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mercury (Hg) and especially its methylated species (MeHg) are toxic chemicals that contaminate humans via the consumption of seafood. The most recent UNEP Global Mercury Assessment stressed that Mediterranean populations have higher Hg levels than people elsewhere in Europe. The present Critical Review updates current knowledge on the sources, biogeochemical cycling, and mass balance of Hg in the Mediterranean and identifies perspectives for future research especially in the context of global change. Concentrations of Hg in the Western Mediterranean average 0.86 ± 0.27 pmol L-1 in the upper water layer and 1.02 ± 0.12 pmol L-1 in intermediate and deep waters. In the Eastern Mediterranean, Hg measurements are in the same range but are too few to determine any consistent oceanographical pattern. The Mediterranean waters have a high methylation capacity, with MeHg representing up to 86% of the total Hg, and constitute a source of MeHg for the adjacent North Atlantic Ocean. The highest MeHg concentrations are associated with low oxygen water masses, suggesting a microbiological control on Hg methylation, consistent with the identification of hgcA-like genes in Mediterranean waters. MeHg concentrations are twice as high in the waters of the Western Basin compared to the ultra-oligotrophic Eastern Basin waters. This difference appears to be transferred through the food webs and the Hg content in predators to be ultimately controlled by MeHg concentrations of the waters of their foraging zones. Many Mediterranean top-predatory fish still exceed European Union regulatory Hg thresholds. This emphasizes the necessity of monitoring the exposure of Mediterranean populations, to formulate adequate mitigation strategies and recommendations, without advising against seafood consumption. This review also points out other insufficiencies of knowledge of Hg cycling in the Mediterranean Sea, including temporal variations in air-sea exchange, hydrothermal and cold seep inputs, point sources, submarine groundwater discharge, and exchanges between margins and the open sea. Future assessment of global change impacts under the Minamata Convention Hg policy requires long-term observations and dedicated high-resolution Earth System Models for the Mediterranean region.
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Affiliation(s)
- Daniel Cossa
- Université Grenoble Alpes, ISTerre, CS 40700, 38058 Grenoble Cedex 9, France
| | - Joël Knoery
- Ifremer, Centre Atlantique de Nantes, BP 44311, 44980 Nantes, France
| | - Daniela Bănaru
- Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
| | - Mireille Harmelin-Vivien
- Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
| | - Jeroen E Sonke
- Géosciences Environnement Toulouse, CNRS/Observatoire Midi-Pyrénées (OMP)/Université de Toulouse, 31400 Toulouse, France
| | - Ian M Hedgecock
- Istituto sull'inquinamento atmosferico, CNR-IIA, 87036 Rende, Italy
| | | | - Ginevra Rosati
- Istituto Nazionale di Oceanografia e di Geofisca Sperimentale (OGS), 34010 Trieste, Italy
| | - Donata Canu
- Istituto Nazionale di Oceanografia e di Geofisca Sperimentale (OGS), 34010 Trieste, Italy
| | | | | | - Nicola Pirrone
- Istituto sull'inquinamento atmosferico, CNR-IIA, 87036 Rende, Italy
| | - Lars-Eric Heimbürger-Boavida
- Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
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48
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Jung E, Kim H, Yun D, Rahman MM, Lee JH, Kim S, Kim CK, Han S. Importance of hydraulic residence time for methylmercury accumulation in sediment and fish from artificial reservoirs. CHEMOSPHERE 2022; 293:133545. [PMID: 34998844 DOI: 10.1016/j.chemosphere.2022.133545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 12/30/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Excessive methylmercury (MeHg) accumulation in dietary fish is a global concern due to its harmful effects on human health, however, environmental factors affecting MeHg accumulation in reservoir ecosystems are not clearly known. In this study, we aim to identify the main sources of MeHg in the water column and the critical factors related to MeHg concentration and methylation rate constant (km) in sediment and total Hg concentration in fish using five-year (2016-2020) monitoring data of the five artificial reservoirs. The preliminary mass budgets constructed using the measurement and online data showed that sediment transport dominated over runoff in the long residence time reservoirs (400-475 days), while runoff dominated over sediment transport in the short residence time reservoirs (10 days). Whereas the sediment km showed a comparable variation with the algal biomass, the sediment MeHg concentration and the length-normalized Hg concentration in the barbel steed and bluegill increased in the longer residence time reservoirs with lower algal biomass. As MeHg accumulation in sediment and fish tends to increase in the slowly overturning reservoirs, the hydraulic residence time should be carefully managed to meet the best protection of human health from chronic Hg exposure by fish consumption.
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Affiliation(s)
- Eunji Jung
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Hyogyeong Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Daseul Yun
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Md Moklesur Rahman
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Jong-Hyeon Lee
- Environmental Human Research & Consulting (EHR&C), Incheon, 22689, Republic of Korea
| | - Suhyun Kim
- Environmental Human Research & Consulting (EHR&C), Incheon, 22689, Republic of Korea
| | - Chan-Kook Kim
- Marine Environment Research Institute, OCEANIC C&T Co., Ltd, Kangwon, 25601, Republic of Korea
| | - Seunghee Han
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
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McCormack MA, Nowlin WH, Dutton J. Effect of trophic position on mercury concentrations in bottlenose dolphins (Tursiops truncatus) from the northern Gulf of Mexico. ENVIRONMENTAL RESEARCH 2022; 204:112124. [PMID: 34571031 DOI: 10.1016/j.envres.2021.112124] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 09/10/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Marine species from the Gulf of Mexico often have higher mercury (Hg) concentrations than conspecifics in the Atlantic Ocean. Spatial differences in Hg sources, environmental conditions, and microbial communities influence both Hg methylation rates and the bioavailability of Hg to organisms at the base of the food web. Mercury bioaccumulates within organisms and biomagnifies in marine food webs, and therefore reaches the greatest concentrations in long-lived marine carnivores, such as dolphins. In this study, we explored whether differences in trophic position and foraging habitat among bottlenose dolphins (Tursiops truncatus) from the northern Gulf of Mexico (nGoM) contributed to the observed variation in skin total Hg (THg) concentrations. Using the δ13C and δ34S values in dolphin skin, we assigned deceased stranded dolphins from Florida (FL; n = 29) and Louisiana (LA; n = 72) to habitats (estuarine, barrier island, and coastal) east and west of the Mississippi River Delta (MRD). We estimated the mean trophic position of dolphins from each habitat using δ15N values from stranded dolphin skin and tissues of primary consumers taken from the literature following a Bayesian framework. Finally, we compared trophic positions and THg concentrations among dolphins from each habitat, accounting for sex and body length. Estimated marginal mean THg concentrations (μg/g dry weight) were greatest in dolphins assigned to the coastal habitat and estuarine habitats east of the MRD (range: 2.59-4.81), and lowest in dolphins assigned to estuarine and barrier island habitats west of the MRD (range: 0.675-0.993). On average, dolphins from habitats with greater THg concentrations also had higher estimated trophic positions, except for coastal dolphins. Our results suggest that differences in trophic positions and foraging habitats contribute to spatial variability in skin THg concentrations among nGoM bottlenose dolphins, however, the relative influence of these factors on THg concentrations are not easily partitioned.
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Affiliation(s)
- Meaghan A McCormack
- Department of Biology, Texas State University, Aquatic Station, San Marcos, TX, 78666, USA.
| | - Weston H Nowlin
- Department of Biology, Texas State University, Aquatic Station, San Marcos, TX, 78666, USA.
| | - Jessica Dutton
- Department of Biology, Texas State University, Aquatic Station, San Marcos, TX, 78666, USA.
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50
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Podshibyakin VА, Shepelenko ЕN, Karlutova OY, Dubonosova IV, Borodkin GS, Popova OS, Zaichenko SB, Dubonosov AD, Bren VA, Minkin VI. Solvent-dependent selective “naked eye” chromofluorogenic multifunctional rhodamine-based probe for Al3+, Cu2+, Hg2+, S2− and CN− ions. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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