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Fu C, He Y, Yang C, He J, Sun L, Pan Y, Deng L, Huang R, Li M, Chang K. Utilizing biochar to decorate nanoscale FeS for the highly effective decontamination of Se(IV) from simulated wastewater. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115285. [PMID: 37517306 DOI: 10.1016/j.ecoenv.2023.115285] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/29/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
Selenium (Se) as an essential nutrient for human beings at trace concentrations, the allowable concentration for the human is only 40 μg/L. Iron sulfide (FeS) nanoparticles have been applied for excessive of selenium (Se) remediation in surface water and groundwater. In this study, FeS nanoparticles were anchored onto biochar (BC) to reduce agglomeration of FeS and prepared into the composite of FeS-BC by pyrolysis to economically and efficiently remove Se(IV) from simulated wastewater based on the excellent performance of FeS and the low cost of BC. Characterizations presented the uniform anchorage of FeS on the BC surface to prevent agglomeration. The results of batch experiments revealed that the removal of Se(IV) by FeS-BC nanomaterials significantly depended on the pH value, with the maximum removal of ∼174.96 mg/g at pH 3.0. A pseudo-second-order kinetic model well reflected the kinetic removal of Se(IV) in pure Se(IV) solution with different concentration, as well as the coexistence of K+, Ca2+, Cl-, and SO42- ions. The presence of K+ ions significantly inhibited the removal of Se(IV) with the increase of K+ ion concentration compared with the effect of the other three ions. SEM-EDS and XPS analyses indicated that the removal process was achieved through adsorption by surface complexation, and reductive precipitation of Se(IV) into Se0 with the electron donor of Fe(II) and S(-II) ions. The FeS-BC nanomaterial exhibited an excellent application prospect in the remediation of Se(IV).
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Affiliation(s)
- Chengke Fu
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Yichao He
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Chengyun Yang
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Jieyu He
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Luna Sun
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Yixin Pan
- School of Civil Engineering, Shaoxing University, Zhejiang 312000, PR China.
| | - Liping Deng
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China
| | - Rui Huang
- School of Civil Engineering, Shaoxing University, Zhejiang 312000, PR China.
| | - Manli Li
- Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Zhejiang 312000, PR China
| | - Kaikai Chang
- School of Chemistry and Chemical Engineering, Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Zhejiang 312000, PR China; Shaoxing Yigao Testing Technology Co.,Ltd., Zhejiang 312000, PR China; Shanxi Pingyao Coal Chemical (Group) Co., Ltd., Shanxi 031100, PR China.
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Soerensen AL, Feinberg A, Schartup AT. Selenium concentration in herring from the Baltic Sea tracks decadal and spatial trends in external sources. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1319-1329. [PMID: 35212334 PMCID: PMC9491286 DOI: 10.1039/d1em00418b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
Selenium (Se) has a narrow range between nutritionally optimal and toxic concentrations for many organisms, including fish and humans. However, the degree to which humans are affecting Se concentrations in coastal food webs with diffuse Se sources is not well described. Here we examine large-scale drivers of spatio-temporal variability in Se concentration in herring from the Baltic Sea (coastal sea) to explore the anthropogenic impact on a species from the pelagic food web. We analyze data from three herring muscle time series covering three decades (1979-2010) and herring liver time series from 20 stations across the Baltic Sea covering a fourth decade (2009-2019). We find a 0.7-2.0% per annum (n = 26-30) Se decline in herring muscle samples from 0.34 ± 0.02 μg g-1 ww in 1979-1981 to 0.18 ± 0.03 μg g-1 ww in 2008-2010. This decrease continues in the liver samples during the fourth decade (6 of 20 stations show significant decrease). We also find increasing North-South and East-West gradients in herring Se concentrations. Using our observations, modelled Se deposition (spatio-temporal information) and estimated Se river discharge (spatial information), we show that the spatial variability in herring Se tracks the variability in external source loads. Further, between 1979 and 2010 we report a ∼5% per annum decline in direct Se deposition and a more gradual, 0.7-2.0% per annum, decline in herring Se concentrations. The slower rate of decrease for herring can be explained by stable or only slowly decreasing riverine inputs of Se to the Baltic Sea as well as recycling of Se within the coastal system. Both processes can reduce the effect of the trend predicted from direct Se deposition. We show that changing atmospheric emissions of Se may influence Se concentrations of a pelagic fish species in a coastal area through direct deposition and riverine inputs from the terrestrial landscape.
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Affiliation(s)
- Anne L Soerensen
- Department of Environmental Research and Monitoring, Swedish Museum of Natural History, Stockholm, Sweden.
| | - Aryeh Feinberg
- Institute for Data, Systems, and Society, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Amina T Schartup
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
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Bueno M, Duval B, Tessier E, Romero-Rama A, Kortazar L, Fernández LÁ, de Diego A, Amouroux D. Selenium distribution and speciation in waters of pristine alpine lakes from central-western Pyrenees (France-Spain). ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1430-1442. [PMID: 35080575 DOI: 10.1039/d1em00430a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The speciation of both redox reactive and volatile selenium (Se) compounds, barely reported in pristine aquatic environments, has never been investigated in remote alpine lakes, considered as sensitive ecosystems to detect the effect of global change. This work presents an integrated investigation on Se distribution and speciation conducted in 20 high altitude pristine lakes from the central-western Pyrenees. Five seasonal sampling campaigns were carried out after snowmelt (June/July) and in early fall (October) for the period 2017-2019. Concentrations of total dissolved Se (TDSe) ranged from 7 to 78 ng L-1, with selenate being ubiquitously observed in most cases (median of 61% of TDSe). Selenite was only occasionally detected up to 4 ng L-1, therefore a fraction of TDSe was presumably in the forms of elemental Se(0) and/or selenides. Depth profiles obtained in different lakes showed the occurrence of such Se(-II, 0) pools in bottom hypoxic to anoxic waters. The production of volatile Se compounds presented a low median total concentration (TVSe) of 33 pg L-1 (range 3-120 pg L-1), mainly in the form of dimethylselenide in subsurface samples (median of 82% of TVSe). The Se concentration in lake waters was significantly correlated with the sulphate concentration (ρ = 0.93, p < 0.0001), demonstrating that it is influenced by erosion and dissolution of Se and S-enriched parent bedrocks. In addition, for Se depleted alpine lake-bedrock systems, long-range transport and wet atmospheric depositions represent a major source of Se for lake waters.
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Affiliation(s)
- Maïté Bueno
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials - IPREM, Pau, France.
| | - Bastien Duval
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials - IPREM, Pau, France.
- Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Sarriena Auzoa z/g, 48940 Leioa, Basque Country, Spain
| | - Emmanuel Tessier
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials - IPREM, Pau, France.
| | - Andrea Romero-Rama
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials - IPREM, Pau, France.
| | - Leire Kortazar
- Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Sarriena Auzoa z/g, 48940 Leioa, Basque Country, Spain
| | - Luís Ángel Fernández
- Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Sarriena Auzoa z/g, 48940 Leioa, Basque Country, Spain
- Plentziako Itsas Estazioa (PIE), University of the Basque Country (UPV/EHU), Areatza Pasealekua, 48620 Plentzia, Basque Country, Spain
| | - Alberto de Diego
- Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Sarriena Auzoa z/g, 48940 Leioa, Basque Country, Spain
- Plentziako Itsas Estazioa (PIE), University of the Basque Country (UPV/EHU), Areatza Pasealekua, 48620 Plentzia, Basque Country, Spain
| | - David Amouroux
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials - IPREM, Pau, France.
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4
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Ankley PJ, Graves SD, Xie Y, DeBofsky A, Weber A, Brinkmann M, Palace VP, Liber K, Hecker M, Janz DM, Giesy JP. Effects of in situ experimental selenium exposure on finescale dace (Phoxinus neogaeus) gut microbiome. ENVIRONMENTAL RESEARCH 2022; 212:113151. [PMID: 35318011 DOI: 10.1016/j.envres.2022.113151] [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: 02/03/2022] [Revised: 03/15/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Selenium (Se) is an environmental contaminant of global concern that can cause adverse effects in fish at elevated levels. Fish gut microbiome play essential roles in gastrointestinal function and host health and can be perturbed by environmental contaminants, including metals and metalloids. Here, an in-situ Se exposure of female finescale dace (Phoxinus neogaeus) using mesocosms was conducted to determine the impacts of Se accumulation on the gut microbiome and morphometric endpoints. Prior to this study, the gut microbiome of finescale dace, a widespread Cyprinid throughout North America, had not been characterized. Exposure to Se caused a hormetic response of alpha diversity of the gut microbiome, with greater diversity at the lesser concentration of 1.6 μg Se/L, relative to that of fish exposed to the greater concentration of 5.6 μg Se/L. Select gut microbiome taxa of fish were differentially abundant between aqueous exposure concentrations and significantly correlated with liver-somatic index (LSI). The potential effects of gut microbiome dysbiosis on condition of wild fish might be a consideration when assessing adverse effects of Se in aquatic environments. More research regarding effects of Se on field-collected fish gut microbiome and the potential adverse effects or benefits on the host is warranted.
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Affiliation(s)
- Phillip J Ankley
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Stephanie D Graves
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Biology Department, Queen's University, Kingston, ON, Canada.
| | - Yuwei Xie
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Abigail DeBofsky
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Alana Weber
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Markus Brinkmann
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Vince P Palace
- IISD Experimental Lakes Area Inc, Winnipeg, Manitoba, Canada
| | - Karsten Liber
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David M Janz
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - John P Giesy
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK, Canada; Department of Environmental Sciences, Baylor University, Waco, TX, USA
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Efficient adsorptive and reductive removal of U(VI) and Se(IV) using porous hexagonal boron nitride supported nanoscale iron sulfide: Performance and mechanism. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Graves SD, Liber K, Palace V, Hecker M, Janz DM. Response of Crustacean Zooplankton and Benthic Macroinvertebrate Communities to Selenium Additions in a Boreal Lake. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:95-107. [PMID: 34808000 DOI: 10.1002/etc.5239] [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: 03/08/2021] [Revised: 05/10/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Selenium (Se) is a contaminant of concern in Canada mainly due to its teratogenic effects on fish and birds. However, few studies have assessed the effects of Se on invertebrates in a field setting. The objective of this experiment was to assess potential community-level impacts of Se additions on zooplankton and benthic macroinvertebrates in a boreal lake ecosystem. From June to August 2018, Se (as selenite) was added to six limnocorrals in Lake 239 at the International Institute for Sustainable Development-Experimental Lakes Area, Northwestern Ontario, Canada, to achieve mean measured aqueous concentrations of 0.4, 0.8, 1.6, 3.4, 5.6 and 7.9 µg Se/L, with three untreated limnocorrals serving as controls (background Se = 0.08-0.09 µg/L). Periphyton, phytoplankton, and invertebrates (zooplankton and benthos) were monitored for 63 days. Zooplankton community composition shifted as a function of Se exposure, with Cladocera biomass and density decreasing with increasing Se concentrations. Similarly, cumulative abundance and biomass of Heptageniidae decreased with increasing Se treatment throughout the experimental period. The present study demonstrated that Se can have impacts on aquatic invertebrates at environmentally relevant exposure levels, and that future ecological risk assessments should consider the impacts of Se on both vertebrates and invertebrates. Environ Toxicol Chem 2022;41:95-107. © 2021 SETAC.
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Affiliation(s)
- Stephanie D Graves
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Karsten Liber
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Vince Palace
- International Institute for Sustainable Development-Experimental Lakes Area, Winnipeg, Manitoba, Canada
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David M Janz
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Graves SD, Liber K, Palace V, Hecker M, Doig LE, Janz DM. Trophic dynamics of selenium in a boreal lake food web. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 280:116956. [PMID: 33799129 DOI: 10.1016/j.envpol.2021.116956] [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: 12/11/2020] [Revised: 03/08/2021] [Accepted: 03/14/2021] [Indexed: 06/12/2023]
Abstract
Selenium (Se) is both an essential micronutrient and a contaminant of concern that is of particular interest in mining-influenced waterbodies in Canada. The objective of this research was to characterize the trophic dynamics of selenium along a gradient of exposure concentrations in a Canadian boreal lake ecosystem. From June 20 to August 22, 2018, six limnocorrals (littoral, ∼3000 L enclosures) were spiked with mean measured concentrations of 0.4, 0.8, 1.6, 3.4, 5.6 and 7.9 μg Se/L as selenite, and three limnocorrals served as untreated controls (background aqueous Se = 0.08-0.09 μg/L). Total Se (TSe) concentrations in water, periphyton, phytoplankton, sediment, benthic macroinvertebrates, zooplankton and female finescale dace (Phoxinus neogaeus; added on day 21 of the experiment) were measured throughout and at the end of the experiment. Total Se bioaccumulation by organisms was generally non-linear. Greater uptake by phytoplankton than periphyton was observed. Taxonomic differences in accumulation of TSe by invertebrates (Heptageniidae = Chironomidae > zooplankton) were observed as well. Fish muscle and ovary tissue TSe bioaccumulation was more variable than that at lower trophic levels and uptake patterns indicated that fish did not reach steady state concentrations. This research provides field-derived models for the uptake of Se by algae and invertebrates, and contributes to a better understanding of the dynamics of TSe bioaccumulation over a gradient of exposure concentrations in cold-water lentic systems.
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Affiliation(s)
- Stephanie D Graves
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
| | - Karsten Liber
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Vince Palace
- International Institute for Sustainable Development - Experimental Lakes Area, Winnipeg, Manitoba, Canada
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Lorne E Doig
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David M Janz
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism. PLANTS 2020; 9:plants9040528. [PMID: 32325841 PMCID: PMC7238072 DOI: 10.3390/plants9040528] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 04/05/2020] [Accepted: 04/12/2020] [Indexed: 01/11/2023]
Abstract
Selenium (Se) uptake by primary producers is the most variable and important step in determining Se concentrations at higher trophic levels in aquatic food webs. We gathered data available about the Se bioaccumulation at the base of aquatic food webs and analyzed its relationship with Se concentrations in water. This important dataset was separated into lotic and lentic systems to provide a reliable model to estimate Se in primary producers from aqueous exposure. We observed that lentic systems had higher organic selenium and selenite concentrations than in lotic systems and selenate concentrations were higher in lotic environments. Selenium uptake by algae is mostly driven by Se concentrations, speciation and competition with other anions, and is as well influenced by pH. Based on Se species uptake by algae in the laboratory, we proposed an accurate mechanistic model of competition between sulfate and inorganic Se species at algal uptake sites. Intracellular Se transformations and incorporation into selenoproteins as well as the mechanisms through which Se can induce toxicity in algae has also been reviewed. We provided a new tool for risk assessment strategies to better predict accumulation in primary consumers and consequently to higher trophic levels, and we identified some research needs that could fill knowledge gaps.
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Graves SD, Liber K, Palace V, Hecker M, Doig LE, Janz DM. Distribution of Experimentally Added Selenium in a Boreal Lake Ecosystem. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:1954-1966. [PMID: 31145497 DOI: 10.1002/etc.4508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/01/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
Human activities have increased the release of selenium (Se) to aquatic environments, but information about the trophic transfer dynamics of Se in Canadian boreal lake systems is limited. In the present study, Se was added as selenite to limnocorrals (2-m-diameter, 3000-L in situ enclosures) in a boreal lake in northwestern Ontario to reach nominal concentrations of 1 and 10 µg Se/L in triplicate each for 77 d, and 3 additional limnocorrals were controls with no Se added. Total Se concentrations were determined in water, sediment, periphyton, benthic macroinvertebrates, zooplankton, and reproductively mature female fathead minnows (Pimephales promelas; added on day 33) collected throughout (and at the end of) the exposure period. Mean measured water Se concentrations in the control, 1-, and 10-µg/L treatments were 0.12, 1.0, and 8.9 µg/L. At the end of exposure (day 77), enrichment functions ranged from 7772 L/kg dry mass in the 8.9-µg/L treatment to 23 495 L/kg dry mass in the 0.12-µg/L treatment, and trophic transfer factors for benthic macroinvertebrates ranged from 0.49 for Gammaridae to 2.3 for Chironomidae. Selenium accumulated in fathead minnow ovaries to concentrations near or above the current US Environmental Protection Agency criterion (15.1 µg/g dry mass for fish ovary/egg) in the 1.0- and 8.9-µg/L treatments, suggesting that, depending on aqueous Se speciation, such exposures have the potential to cause Se accumulation in fish to levels of concern in cold-water, boreal lake systems. Environ Toxicol Chem 2019;38:1954-1966. © 2019 SETAC.
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Affiliation(s)
- Stephanie D Graves
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Karsten Liber
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Vince Palace
- International Institute for Sustainable Development-Experimental Lakes Area, Winnipeg, Manitoba, Canada
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Lorne E Doig
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David M Janz
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Proulx I, Hare L, Dupré B. Is it justifiable to pool Chironomus species in trace element contamination studies? ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:145-159. [PMID: 30298942 DOI: 10.1002/etc.4294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/02/2018] [Accepted: 10/06/2018] [Indexed: 06/08/2023]
Abstract
Larvae of the insect Chironomus (Chironomidae: Diptera) have great potential for estimating the bioavailability of sedimentary trace elements because they are common in fine sediments and tolerate high concentrations of these contaminants. Their use as biomonitors is limited by the fact that they are difficult to identify as to species, and the species can differ in their trace element concentrations. To determine whether pooling species would compromise their use as trace element biomonitors, we identified species of Chironomus larvae collected from 22 lakes and measured their concentrations of 9 trace elements. We found that the concentrations of arsenic, barium, cobalt, copper, manganese, and nickel did not generally differ between sympatric Chironomus species, which indicates that they could be pooled for analyses of these trace elements. In contrast, we found that cadmium (Cd), selenium (Se), and zinc (Zn) concentrations differed between species living at the same site according to their feeding behavior, that is, Chironomus species feeding on oxic sediments tended to have higher Cd and Zn concentrations, whereas those feeding on deeper anoxic sediments had higher Se concentrations. Because Se and Zn concentrations in sympatric Chironomus species usually differed by only a factor of 2, separating species based on their feeding behavior might not be as crucial as for Cd if larval Se and Zn concentrations vary greatly from site to site. Environ Toxicol Chem 2019;38:145-159. © 2018 SETAC.
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Affiliation(s)
- Isabelle Proulx
- Centre Eau Terre Environnement, Institut national de la recherche scientifique, Quebec City, Quebec, Canada
- GHD, Quebec City, Quebec, Canada
| | - Landis Hare
- Centre Eau Terre Environnement, Institut national de la recherche scientifique, Quebec City, Quebec, Canada
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Constantinescu-Aruxandei D, Frîncu RM, Capră L, Oancea F. Selenium Analysis and Speciation in Dietary Supplements Based on Next-Generation Selenium Ingredients. Nutrients 2018; 10:E1466. [PMID: 30304813 PMCID: PMC6213372 DOI: 10.3390/nu10101466] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/02/2018] [Accepted: 10/03/2018] [Indexed: 12/27/2022] Open
Abstract
Selenium is essential for humans and the deficit of Se requires supplementation. In addition to traditional forms such as Se salts, amino acids, or selenium-enriched yeast supplements, next-generation selenium supplements, with lower risk for excess supplementation, are emerging. These are based on selenium forms with lower toxicity, higher bioavailability, and controlled release, such as zerovalent selenium nanoparticles (SeNPs) and selenized polysaccharides (SPs). This article aims to focus on the existing analytical systems for the next-generation Se dietary supplement, providing, at the same time, an overview of the analytical methods available for the traditional forms. The next-generation dietary supplements are evaluated in comparison with the conventional/traditional ones, as well as the analysis and speciation methods that are suitable to reveal which Se forms and species are present in a dietary supplement. Knowledge gaps and further research potential in this field are highlighted. The review indicates that the methods of analysis of next-generation selenium supplements should include a step related to chemical species separation. Such a step would allow a proper characterization of the selenium forms/species, including molecular mass/dimension, and substantiates the marketing claims related to the main advantages of these new selenium ingredients.
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Affiliation(s)
- Diana Constantinescu-Aruxandei
- National Research & Development Institute for Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania.
| | - Rodica Mihaela Frîncu
- INCDCP-ICECHIM Calarasi Subsidiary, 7A Nicolae Titulescu St., 915300 Lehliu Gara, Romania.
| | - Luiza Capră
- National Research & Development Institute for Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania.
| | - Florin Oancea
- National Research & Development Institute for Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania.
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Ponton DE, Fortin C, Hare L. Organic selenium, selenate, and selenite accumulation by lake plankton and the alga Chlamydomonas reinhardtii at different pH and sulfate concentrations. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2112-2122. [PMID: 29672902 DOI: 10.1002/etc.4158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/10/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Selenium (Se) concentrations measured in lake planktonic food chains (microplankton <64 μm, copepods, and Chaoborus larvae) were strongly correlated with the concentrations of dissolved organic Se. These correlations were strengthened slightly by adding the concentrations of dissolved selenate to those of organic Se. To better understand the role of Se species and the influence of water chemistry on Se uptake, we exposed the green alga Chlamydomonas reinhardtii to selenite, selenate, or selenomethionine at various H+ ion and sulfate concentrations under controlled laboratory conditions. At low sulfate concentrations, inorganic Se species (selenate >> selenite) were more readily accumulated by this alga than was selenomethionine. However, at higher sulfate concentrations the uptake of selenite was higher than that of selenate, whereas the uptake of selenomethionine remained unchanged. Although the pH of the exposure water did not influence the uptake of selenate by this alga, the accumulation of selenomethionine and selenite increased with pH because of their relative pH-related speciation. The Se concentrations that we measured in C. reinhardtii exposed to selenomethionine were 30 times lower than those that we measured in field-collected microplankton exposed in the same laboratory conditions. This difference is explained by the taxa present in the microplankton samples. Using the present laboratory measurements of Se uptake in microplankton and of natural Se concentrations in lake water allowed us to model Se concentrations in a lake pelagic food chain. Environ Toxicol Chem 2018;37:2112-2122. © 2018 SETAC.
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Affiliation(s)
- Dominic E Ponton
- Institut National de la Recherche Scientifique-Centre Eau, Terre et Environnement (INRS-ETE), Université du Québec, Quebec City, Quebec, Canada
| | - Claude Fortin
- Institut National de la Recherche Scientifique-Centre Eau, Terre et Environnement (INRS-ETE), Université du Québec, Quebec City, Quebec, Canada
| | - Landis Hare
- Institut National de la Recherche Scientifique-Centre Eau, Terre et Environnement (INRS-ETE), Université du Québec, Quebec City, Quebec, Canada
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13
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Lu J, Fu F, Ding Z, Li N, Tang B. Removal mechanism of selenite by Fe 3O 4-precipitated mesoporous magnetic carbon microspheres. JOURNAL OF HAZARDOUS MATERIALS 2017; 330:93-104. [PMID: 28212514 DOI: 10.1016/j.jhazmat.2017.01.056] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 01/24/2017] [Accepted: 01/30/2017] [Indexed: 06/06/2023]
Abstract
A mesoporous composite of magnetic carbon microspheres (MCMSs) was synthesized via introducing Fe3O4 nanoscale particles to the surface of carbon microspheres (CMSs) by coprecipitation. Scanning electron microscopy and transmission electron microscopy showed the Fe3O4 nanoscale particles were dispersedly immobilized on the surface of CMSs. The MCMSs demonstrated effective removal of selenite (Se(IV)) from wastewater. MCMSs showed the regular pattern where the lower pH value, the lower residual Se(IV) concentration. The coexisting sulfate, nitrate, chloride, carbonate, and silicate had no significant effect on Se(IV) removal, whereas phosphate hindered the removal of Se(IV) by competing with Se(IV) and formed inner-sphere complexes with Fe3O4 on the surface of MCMSs. Through X-ray photoelectron spectroscopy analysis, Se(IV) can not only form inner-sphere complexes with MCMSs, but also be reduced to insoluble elemental selenium (Se0) by Fe3O4 which was oxidized and formed γ-Fe2O3. Moreover, the superparamagnetic MCMSs can be easily separated from solution by means of an external magnetic field. The high removal efficiency for Se(IV) and rapid separability of MCMSs made them promising materials for the application in the practice.
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Affiliation(s)
- Jianwei Lu
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Fenglian Fu
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Zecong Ding
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Na Li
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Bing Tang
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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Ponton DE, Caron A, Hare L, Campbell PGC. Hepatic oxidative stress and metal subcellular partitioning are affected by selenium exposure in wild yellow perch (Perca flavescens). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 214:608-617. [PMID: 27131821 DOI: 10.1016/j.envpol.2016.04.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/11/2016] [Accepted: 04/15/2016] [Indexed: 06/05/2023]
Abstract
Yellow perch (Perca flavescens) collected from 11 lakes in the Canadian mining regions of Sudbury (Ontario) and Rouyn-Noranda (Quebec) display wide ranges in the concentrations of cadmium (Cd), nickel (Ni), selenium (Se), and thallium (Tl) in their livers. To determine if these trace elements, as well as copper (Cu) and zinc (Zn), are causing oxidative stress in these fish, we measured three biochemical indicators (glutathione (GSH), glutathione disulfide (GSSG) and thiobarbituric acid-reactive substances (TBARS)) in their livers. We observed that 44% of the yellow perch that we collected were at risk of cellular oxidative stress and lipid peroxidation. Considering all fish from all lakes, higher liver Se concentrations were coincident with both lower proportions of GSSG compared to GSH and lower concentrations of TBARS, suggesting that the essential trace-element Se acts as an antioxidant. Furthermore, fish suffering oxidative stress had higher proportions of Cd, Cu and Zn in potentially sensitive subcellular fractions (organelles and heat-denatured proteins) than did fish not suffering from stress. This result suggests that reactive oxygen species may oxidize metal-binding proteins and thereby reduce the capacity of fish to safely bind trace metals. High Cd concentrations in metal-sensitive subcellular fractions likely further exacerbate the negative effects of lower Se exposure.
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Affiliation(s)
- Dominic E Ponton
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, G1K 9A9, QC, Canada.
| | - Antoine Caron
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, G1K 9A9, QC, Canada
| | - Landis Hare
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, G1K 9A9, QC, Canada
| | - Peter G C Campbell
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, G1K 9A9, QC, Canada
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15
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DeForest DK, Pargee S, Claytor C, Canton SP, Brix KV. Biokinetic food chain modeling of waterborne selenium pulses into aquatic food chains: Implications for water quality criteria. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2016; 12:230-246. [PMID: 26456584 DOI: 10.1002/ieam.1696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/05/2015] [Accepted: 07/13/2015] [Indexed: 06/05/2023]
Abstract
We evaluated the use of biokinetic models to predict selenium (Se) bioaccumulation into model food chains after short-term pulses of selenate or selenite into water. Both periphyton- and phytoplankton-based food chains were modeled, with Se trophically transferred to invertebrates and then to fish. Whole-body fish Se concentrations were predicted based on 1) the background waterborne Se concentration, 2) the magnitude of the Se pulse, and 3) the duration of the Se pulse. The models were used to evaluate whether the US Environmental Protection Agency's (USEPA's) existing acute Se criteria and their recently proposed intermittent Se criteria would be protective of a whole-body fish Se tissue-based criterion of 8.1 μg g(-1) dry wt. Based on a background waterborne Se concentration of 1 μg L(-1) and pulse durations of 1 d and 4 d, the Se pulse concentrations predicted to result in a whole-body fish Se concentration of 8.1 μg g(-1) dry wt in the most conservative model food chains were 144 and 35 μg L(-1), respectively, for selenate and 57 and 16 μg L(-1), respectively, for selenite. These concentrations fall within the range of various acute Se criteria recommended by the USEPA based on direct waterborne toxicity, suggesting that these criteria may not always be protective against bioaccumulation-based toxicity that could occur after short-term pulses. Regarding the USEPA's draft intermittent Se criteria, the biokinetic modeling indicates that they may be overly protective for selenate pulses but potentially underprotective for selenite pulses. Predictions of whole-body fish Se concentrations were highly dependent on whether the food chain was periphyton- or phytoplankton-based, because the latter had much greater Se uptake rate constants. Overall, biokinetic modeling provides an approach for developing acute Se criteria that are protective against bioaccumulation-based toxicity after trophic transfer, and it is also a useful tool for evaluating averaging periods for chronic Se criteria.
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Affiliation(s)
| | | | - Carrie Claytor
- GEI Consultants, Denver, Colorado, USA
- Present affiliation: Copper Development Association, New York, New York, USA
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16
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Rosabal M, Mounicou S, Hare L, Campbell PGC. Metal (Ag, Cd, Cu, Ni, Tl, and Zn) Binding to Cytosolic Biomolecules in Field-Collected Larvae of the Insect Chaoborus. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:3247-3255. [PMID: 26886407 DOI: 10.1021/acs.est.5b05961] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We characterized the biomolecules involved in handling cytosolic metals in larvae of the phantom midge (Chaoborus) collected from five mining-impacted lakes by determining the distribution of Ag, Cd, Cu, Ni, Tl, and Zn among pools of various molecular weights (HMW: high molecular weight, >670-40 kDa; MMW: medium molecular weight, 40-<1.3 kDa; LMW: low molecular weight, <1.3 kDa). Appreciable concentrations of nonessential metals were found in the potentially metal-sensitive HMW (Ag and Ni) and LMW (Tl) pools, whereas the MMW pool, which includes metallothioneins (MTs) and metallothionein-like proteins and peptides (MTLPs), appears to be involved in Ag and Cd detoxification. Higher-resolution fractionation of the heat-stable protein (HSP) fraction revealed further differences in the partitioning of nonessential metals (i.e., Ag = Cd ≠ Ni ≠ Tl). These results provide unprecedented details about the metal-handling strategies employed by a metal-tolerant, freshwater animal in a field situation.
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Affiliation(s)
- Maikel Rosabal
- Institut National de la Recherche Scientifique - Centre Eau Terre Environnement (INRS-ETE) , 490 de la Couronne, Quebec City, Quebec, G1K 9A9 Canada
| | - Sandra Mounicou
- CNRS/UPPA, Laboratoire de Chimie Analytique Bio-Inorganique et Environnement UMR 5254 , Hélioparc, 2. Av. Pr. Angot, Pau, 64053 France
| | - Landis Hare
- Institut National de la Recherche Scientifique - Centre Eau Terre Environnement (INRS-ETE) , 490 de la Couronne, Quebec City, Quebec, G1K 9A9 Canada
| | - Peter G C Campbell
- Institut National de la Recherche Scientifique - Centre Eau Terre Environnement (INRS-ETE) , 490 de la Couronne, Quebec City, Quebec, G1K 9A9 Canada
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17
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Ponton DE, Hare L. Using Sulfur Stable Isotopes to Understand Feeding Behavior and Selenium Concentrations in Yellow Perch (Perca flavescens). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:7633-7640. [PMID: 26020463 DOI: 10.1021/acs.est.5b00718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We measured selenium (Se) concentrations in yellow perch (Perca flavescens) muscle and their prey collected from four Se-contaminated lakes located near metal smelters in the eastern Canadian cities of Sudbury and Rouyn-Noranda. Yellow perch Se concentrations were related to their weight in two of the four lakes. Measurements of sulfur stable isotopes (δ(34)S) in yellow perch muscle and stomach contents showed that larger fish tended to feed less on zooplankton and more on benthic invertebrates than did smaller fish. Because Se concentrations are lower and δ(34)S signatures are higher in zooplankton than in sediment-feeding invertebrates, there was an inverse relationship between animal Se concentrations and δ(34)S signatures in all of our study lakes. δ(34)S signatures were highly effective in characterizing these food web relationships. Selenium concentrations in yellow perch were 1.6 times those of its prey, which indicates that Se is biomagnified by this fish in our study lakes. Estimated Se concentrations in yellow perch gonads suggest that in two of our study lakes one-third of fish are at risk of reproductive toxicity.
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Affiliation(s)
- Dominic E Ponton
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, QC, Canada G1K 9A9
| | - Landis Hare
- Institut national de la recherche scientifique, Centre - Eau Terre Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Quebec City, QC, Canada G1K 9A9
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Razavi NR, Arts MT, Qu M, Jin B, Ren W, Wang Y, Campbell LM. Effect of eutrophication on mercury, selenium, and essential fatty acids in bighead carp (Hypophthalmichthys nobilis) from reservoirs of eastern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 499:36-46. [PMID: 25173860 DOI: 10.1016/j.scitotenv.2014.08.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 08/01/2014] [Accepted: 08/08/2014] [Indexed: 06/03/2023]
Abstract
Analyses of the risks and benefits of consuming fish assess the content of beneficial fatty acids found in fish relative to harmful pollutants such as methylmercury (MeHg). Quantifying the effect of eutrophication on mercury (Hg), selenium (Se) and essential fatty acids (EFAs) in fish is necessary to determine how measures of risk vary with productivity. Total Hg and MeHg, Se and fatty acids, including the EFA eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3), were analyzed in Bighead Carp (Hypophthalmichthys nobilis) dorsal muscle tissue from seven subtropical reservoirs of eastern China. Individual elements and fatty acids, as well as derived measures of risk (Se:Hg and hazard quotient, HQ(EFA)) were regressed against indicators of eutrophication, including total phosphorous (TP), chlorophyll-a (chl-a) and phytoplankton species composition. We found low MeHg concentrations (range=0.018-0.13 μg/g ww) and Se concentrations (range=0.12-0.28 μg/g ww), and Se:Hg molar ratios that were well above 1.0, indicating a low risk of Hg toxicity. Bighead Carp had a high content of total polyunsaturated fatty acids (∑PUFAs=44.2-53.6%), which included both EPA (6.9-12.5%) and DHA (16.1-23.2%). However, fish had significantly lower Se:Hg molar ratios in reservoirs with high TP, and lower EPA content with increasing plankton density (i.e. higher chl-a). Phytoplankton species composition predicted Se concentrations, but not Hg concentrations or EFA content. Overall, Hg concentrations in Bighead Carp were very low relative to consumption guidelines, and Se concentrations were adequate to confer protective benefits against MeHg toxicity. Our findings suggest that changes to plankton species composition and density with eutrophication may result in fish of lower nutritional value and thus increase risks to fish consumers by changing the availability of Se and EPA relative to MeHg.
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Affiliation(s)
- N Roxanna Razavi
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada.
| | - Michael T Arts
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario M5B 2K3, Canada
| | - Mingzhi Qu
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Binsong Jin
- Center for Watershed Ecology, Institute of Life Science and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, Jiangxi, 330031, China
| | - Wenwei Ren
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yuxiang Wang
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Linda M Campbell
- Environmental Science, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
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Rosabal M, Ponton DE, Campbell PGC, Hare L. Uptake and subcellular distributions of cadmium and selenium in transplanted aquatic insect larvae. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:12654-12661. [PMID: 25268462 DOI: 10.1021/es503133g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We transplanted larvae of the phantom midge Chaoborus punctipennis from a lake having lower concentrations of Cd and Se (Lake Dasserat) to a more contaminated lake (Lake Dufault) located near a metal smelter in Rouyn-Noranda, Quebec. Transplanted individuals were held in mesh mesocosms for up to 16 days where they were fed with indigenous contaminated zooplankton. Larval Cd and Se burdens increased over time, and came to equal those measured in indigenous C. punctipennis from contaminated Lake Dufault. Larval Se burdens increased steadily, whereas those of Cd showed an initial lag phase that we explain by a change in the efficiency with which this insect assimilated Cd from its prey. We measured Cd and Se in subcellular fractions and found that larvae sequestered the majority (60%) of the incoming Cd in a detoxified fraction containing metal-binding proteins, whereas a minority of this nonessential metal was in sensitive fractions (20%). In contrast, a much higher proportion of the essential element Se (40%) was apportioned to metabolically active sensitive fractions. Larvae took up equimolar quantities of these elements over the course of the experiment. Likewise, Cd and Se concentrations in wild larvae were equimolar, which suggests that they are exposed to equimolar bioavailable concentrations of these elements in our study lakes.
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Affiliation(s)
- Maikel Rosabal
- Institut national de la recherche scientifique, Centre Eau Terre Environnement (INRS-ETE), 490 de la Couronne, Québec, Québec, Canada , G1K 9A9
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