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Peter PO, Ifon BE, Nkinahamira F, Lasisi KH, Li J, Hu A, Yu CP. Harnessing the composition of dissolved organic matter in lagoon sediment in association with rare earth elements using fluorescence and UV-visible absorption spectroscopy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168139. [PMID: 37890635 DOI: 10.1016/j.scitotenv.2023.168139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 10/06/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
Dissolved Organic Matter (DOM) plays a pivotal role in influencing metal binding and mobility within lagoon sediments. However, there exists a gap in understanding the compositional alterations of DOM concerning Rare Earth Elements (REEs) across varying pollution gradients. This study aimed to characterize DOM and examine its relationship with REEs in sediment cores from different pollution levels in Yundang Lagoon, China using excitation-emission matrix-parallel factor analysis (EEM-PARAFAC). The results raveled four distinct fluorescent components. Among these, two correspond to humic-like substances, while the remaining two are attributed to protein-like substances. Remarkably, the prevalence of protein-like compounds was observed to exceed 58% of the total fluorescence intensity across all the investigated sites. Furthermore, a substantial discrepancy in total fluorescence intensity was detected between the Songbai Lake and the Inner and Outer Lagoon, indicating a variance in DOM content. In terms of REEs, the average concentration of total REEs was notably elevated within the Songbai Lake sediments (318.36 mg/kg) as compared to the Inner and Outer Lagoon sediments (296.36 and 278.05 mg/kg, respectively). Of significance is the enrichment of Light Rare Earth Elements (LREEs), particularly Ce, La, Pr, and Nd, over Heavy REEs (HREEs) across all surveyed locations. Intriguingly, a coherent trend emerged wherein the fluorescence intensity and LREE concentrations exhibited a synchronized increase from Outer to Inner to Songbai Lake core sediments. This observation substantiates a strong correlation between DOM content and pollution levels (p < 0.05). By shedding light on the intricate interplay between DOM and REEs within urban aquatic sediments, this study imparts novel insights which enrich our comprehension of urban environmental dynamics.
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Affiliation(s)
- Philomina Onyedikachi Peter
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Binessi Edouard Ifon
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - François Nkinahamira
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China
| | - Kayode Hassan Lasisi
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiangwei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Anyi Hu
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Chang-Ping Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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Payandi-Rolland D, Shirokova LS, Larieux J, Bénézeth P, Pokrovsky OS. Laboratory growth capacity of an invasive cyanobacterium ( Microcystis aeruginosa) on organic substrates from surface waters of permafrost peatlands. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:659-669. [PMID: 36806306 DOI: 10.1039/d2em00456a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Within a global warming trend, invasive cyanobacteria, abundant in tropical and temperate regions, can migrate northward and colonize thermokarst lakes in permafrost-affected territories. For a better understanding of the cyanobacterial proliferation mechanism in those lakes, we performed laboratory growth of typical invasive cyanobacteria, Microcystis aeruginosa, onto various organic-rich solutions representative of permafrost peatlands. Aqueous leachates of lichen, moss and peat were the most favorable substrates for massive growth. The growth in the presence of all organic substrates produced an increase in solution pH by two units and a sizable (30-50%) decrease in the concentration of dissolved organic carbon. The observed increase in the dissolved organic carbon aromaticity degree likely reflected preferential cyanobacterial uptake of aliphatic, optically transparent organic substances. Cyanobacterial growth over a bloom period can create a carbon sink (uptake of 2.5 and 8.3 g C-CO2 m-2 d-1) that can offset the net heterotrophic status of thermokarst lakes in permafrost peatlands, thus switching the lake status from a C source to a C sink. Therefore, predictions of future carbon exchanges with the atmosphere in surface waters of permafrost peatlands require explicit accounting for the possibility of invasive cyanobacterial growth.
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Affiliation(s)
- Dahédrey Payandi-Rolland
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, Francev.
| | - Liudmila S Shirokova
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, Francev.
- N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of RAS, Nab Severnoi Dviny 23, Arkhangelsk, Russia
| | - Julien Larieux
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, Francev.
| | - Pascale Bénézeth
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, Francev.
| | - Oleg S Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, Francev.
- BIO-GEO-CLIM Laboratory, Tomsk State University, 35 Lenina Pr., Tomsk, Russia
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Lim AG, Loiko SV, Kuzmina DM, Krickov IV, Shirokova LS, Kulizhsky SP, Pokrovsky OS. Organic carbon, and major and trace elements reside in labile low-molecular form in the ground ice of permafrost peatlands: a case study of colloids in peat ice of Western Siberia. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1443-1459. [PMID: 35226006 DOI: 10.1039/d1em00547b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The fate of organic carbon (OC), nutrients and metals accumulated in thawing permafrost ice is at the forefront of environmental studies in the Arctic. In contrast to a fairly good understanding of the chemical nature of dissolved OC (DOC) and metals in surface Arctic waters, the speciation and colloidal status of solutes accommodated in the dispersed ground ice remain virtually unknown. Here we used a size fractionation procedure (centrifugal ultrafiltration) to quantify the proportion of colloidal (3 kDa to 0.45 μm) and conventionally dissolved low molecular weight (LMW<3 kDa) fractions of DOC, and major and trace elements in the porewater and ice of 5 peat cores sampled along a 400 km permafrost and climate gradient in the largest peatland in the world, the Western Siberian Lowland (WSL). We discovered that the strong (a factor of 2 to 10) increase in the total dissolved (<0.45 μm) concentration of DOC and most major and trace elements in the peat ice relative to the peat porewater from the thawed layer was essentially linked to an increase in the LMW<3 kDa fraction. This increase in the potentially bioavailable fraction in the peat ice relative to the porewater was especially pronounced for DOC, P and many trace elements including metal micronutrients, and was observed throughout all permafrost zones. This contrasted with element distribution in the upper (thaw) layer, where the majority of these elements were present in the colloidal pool. Following previous experiments on permafrost peatland surface waters, we hypothesized that the freeze-thaw cycles of peat porewater were responsible for generation of the LMW fraction in the bottom part of the peat core. Results of this study demonstrate that carbon, and macro- and micro-nutrients as well as trace metals in ground ice of permafrost peatlands are essentially present in a low molecular weight (<3 kDa) and potentially bioavailable form that can strongly impact the riverine export fluxes of solutes during permafrost thaw.
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Affiliation(s)
- Artem G Lim
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av., 36, Tomsk, Russia
| | - Sergey V Loiko
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av., 36, Tomsk, Russia
| | - Daria M Kuzmina
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av., 36, Tomsk, Russia
| | - Ivan V Krickov
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av., 36, Tomsk, Russia
| | - Liudmila S Shirokova
- Geoscience and Environment Toulouse (GET), UMR 5563 CNRS University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France.
- N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences (FECIAR UrB RAS), Arkhangelsk, Russia
| | - Sergey P Kulizhsky
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av., 36, Tomsk, Russia
| | - Oleg S Pokrovsky
- Geoscience and Environment Toulouse (GET), UMR 5563 CNRS University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France.
- N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences (FECIAR UrB RAS), Arkhangelsk, Russia
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Koppel DJ, Bishop J, Kopalová K, Price GAV, Brown KE, Adams MS, King CK, Jolley DF. Metal lability and environmental risk in anthropogenically disturbed Antarctic melt streams. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117627. [PMID: 34426394 DOI: 10.1016/j.envpol.2021.117627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 06/07/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
Antarctic melt streams are important ecosystems that increasingly face contaminant pressures from anthropogenic sources. Metal contaminants are often reported in the limno-terrestrial environment but their speciation is not well characterised, making environmental risk assessments difficult. This paper characterises labile metal concentrations in five melt streams and three shallow lakes around the Casey and Wilkes research stations in East Antarctica using chemical extracts and field deployments of diffusive gradients in thin-film (DGT) samplers. An acute toxicity test with field-collected Ceratadon purpeus and taxonomic identification of diatoms in melt streams were used to infer environmental risk. Copper and zinc were the most labile metals in the melt streams. DGT-labile copper concentrations were up to 3 μg Cu L-1 in melt-stream waters but not labile below the sediment-water interface. DGT-labile zinc concentrations were consistent above and below the sediment-water interface at concentrations up to 14 μg Zn L-1 in four streams, but one stream showed evidence of zinc mineralisation in the sediment with a flux to overlying and pore waters attributed to the reductive dissolution of iron and manganese oxides. Other metals, such as chromium, nickel, and lead were acid-extractable from the sediments, but not labile in pore waters or overlying waters. All streams had unique compositions of freshwater diatoms, but one had particularly reduced diversity and richness, which correlated to metal contamination and sediment physico-chemical properties such as a finer particle size. In laboratory bioassays with field-collected samples of the Antarctic moss C. purpeus, there was no change in photosynthetic efficiency following 28-d exposure to 700, 900, 1060, or 530 μg L-1 of cadmium, copper, nickel, and zinc, respectively. This study shows that microorganisms such as diatoms may be at greater risk from contaminants than mosses, and highlights the importance of geochemical factors controlling metal lability.
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Affiliation(s)
- Darren J Koppel
- Faculty of Science, University of Technology Sydney, NSW, Australia; Faculty of Science and Engineering, Curtin University, Perth, WA, Australia; CSIRO Land and Water, Lucas Heights, NSW, Australia.
| | - Jordan Bishop
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Kateřina Kopalová
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Gwilym A V Price
- Faculty of Science, University of Technology Sydney, NSW, Australia; CSIRO Land and Water, Lucas Heights, NSW, Australia
| | - Kathryn E Brown
- Australian Antarctic Division, Kingston, Tasmania, Australia
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Bonassa G, Bolsan AC, Hollas CE, Venturin B, Candido D, Chini A, De Prá MC, Antes FG, Campos JL, Kunz A. Organic carbon bioavailability: Is it a good driver to choose the best biological nitrogen removal process? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 786:147390. [PMID: 33964770 DOI: 10.1016/j.scitotenv.2021.147390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/19/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
Organic carbon can affect the biological nitrogen removal process since the Anammox, heterotrophic and denitrifying bacteria have different affinities and feedback in relation to carbon/nitrogen ratio. Therefore, we reviewed the wastewater carbon concentration, its biodegradability and bioavailability to choose the appropriate nitrogen removal process between conventional (nitrification-denitrification) and Anammox-based process (i.e. integrated with the partial nitritation, nitritation, simultaneous partial nitrification and denitrification or partial-denitrification). This review will cover: (i) strategies to choose the best nitrogen removal route according to the wastewater characteristics in relation to the organic matter bioavailability and biodegradability; (ii) strategies to efficiently remove nitrogen and the remaining carbon from effluent in anammox-based process and its operating cost; (iii) an economic analysis to determine the operational costs of two-units Anammox-based process when compared with the commonly applied one-unit Anammox system (partial-nitritation-Anammox). On this review, a list of alternatives are summarized and explained for different nitrogen and biodegradable organic carbon concentrations, which are the main factors to determine the best treatment process, based on operational and economic terms. In summary, it depends on the wastewater carbon biodegradability, which implies in the wastewater treatment cost. Thus, to apply the conventional nitrification/denitrification process a CODb/N ratio higher than 3.5 is required to achieve full nitrogen removal efficiency. For an economic point of view, according to the analysis the minimum CODb/gN for successful nitrogen removal by nitrification/denitrification is 5.8 g. If ratios lower than 3.5 are applied, for successfully higher nitrogen removal rates and the economic feasibility of the treatment, Anammox-based routes can be applied to the wastewater treatment plant.
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Affiliation(s)
| | | | | | - Bruno Venturin
- Western Paraná State University, 85819-110 Cascavel, PR, Brazil
| | - Daniela Candido
- Federal University of Fronteira Sul, 99700-000 Erechim, Brazil
| | - Angélica Chini
- Western Paraná State University, 85819-110 Cascavel, PR, Brazil
| | - Marina C De Prá
- Federal University of Technology - Parana (UTFPR), 85660-000 Dois Vizinhos, PR, Brazil
| | | | - José Luis Campos
- Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avda. Padre Hurtado 750, 2503500 Viña del Mar, Chile
| | - Airton Kunz
- Western Paraná State University, 85819-110 Cascavel, PR, Brazil; Federal University of Fronteira Sul, 99700-000 Erechim, Brazil; Embrapa Suínos e Aves, 89715-899 Concórdia, SC, Brazil.
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6
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Payandi-Rolland D, Shirokova LS, Labonne F, Bénézeth P, Pokrovsky OS. Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands. CHEMOSPHERE 2021; 279:130510. [PMID: 33862357 DOI: 10.1016/j.chemosphere.2021.130510] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 03/17/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Despite the importance of soil and surface waters freezing in permafrost landscapes, the behaviour of dissolved organic carbon (DOC), nutrients and metals during periodic freeze-thaw cycles (FTC) remains poorly known. The on-going climate warming is likely to increase the frequency of FTC in continental aquatic settings, which could modify the chemical composition of waters. In this study, we conducted 9 repetitive cycles of overnight freezing (-20 °C) and 5 h thawing (4 °C) in the laboratory using representative 0.22 μm-filtered waters from NE European permafrost peatland: leachates of vegetation and soil, and natural surface waters (depression, thermokarst lake and river). Only minor (<5%-15%) changes of DOC concentrations, SUVA254 and molecular weight were observed in all leachates and the depression water. In contrast, several trace elements (Fe, Al, P, Mn, As, and REE) exhibited sizable variations during FTC (>10%). The leachates and the depression water were enriched in trace elements, whereas the thermokarst lake and the river demonstrated a decrease in concentration of Fe (-39 and -94%, respectively), Al (-9 and -85%), and Mn (-10 and -79%) during FTC. Overall, the observations demonstrated an increase in aliphatic low molecular weight organic matter (OM), and the precipitation of Fe, Al hydroxides and organo-mineral particles. Therefore, enhanced of frequency of FTC can favour the release of metals and toxicants from acidic OM-rich surface waters and maintain stable OM-metals-colloids in large lakes and rivers, thus regulating aquatic transport of DOC and metals from soils to the Arctic Ocean.
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Affiliation(s)
- Dahédrey Payandi-Rolland
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France.
| | - Liudmila S Shirokova
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France; N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Arkhangelsk, Nab Severnoi Dviny 23, Russia
| | - Fabian Labonne
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France
| | - Pascale Bénézeth
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France
| | - Oleg S Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France; BIO-GEO-CLIM Laboratory, Tomsk State University, 35 Lenina Pr., Tomsk, Russia
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7
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Glass JB, Cowan ET, Johannesson KH. Lanthanide rarity in natural waters: implications for microbial C1 metabolism. FEMS Microbiol Lett 2020; 367:5920214. [DOI: 10.1093/femsle/fnaa165] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/07/2020] [Indexed: 01/01/2023] Open
Abstract
ABSTRACT
Research in the last decade has illuminated the important role that lanthanides play in microbial carbon metabolism, particularly methylotrophy. Environmental omics studies have revealed that lanthoenzymes are dominant in some environments, and laboratory studies have shown that lanthoenzymes are favored over their calcium-containing counterparts even when calcium is far more abundant. Lanthanide elements are common in rocks but occur at exceedingly low levels in most natural waters (picomolar to nanomolar range) with the exception of volcanic hot springs, which can reach micromolar concentrations. Calcium is orders of magnitude higher in abundance than lanthanide elements across natural settings. Bacteria that use lanthanides for growth on simple carbon compounds (e.g. methanol and ethanol) grow optimally at micromolar concentrations. It is highly likely that bacteria in the environment have evolved specialized lanthanide sequestration and high-affinity uptake systems to overcome lanthanide deprivation. Indeed, we identified genes in soil metagenomes encoding the lanthanide-binding protein lanmodulin, which may be important for cellular differentiation between calcium and lanthanides. More research is needed on microbial adaptations to lanthanide scarcity.
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Affiliation(s)
- Jennifer B Glass
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA, 30332, USA
| | - Elizabeth T Cowan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
| | - Karen H Johannesson
- School for the Environment, University of Massachusetts, 100 Morrissey Blvd., Boston, MA, 02125, USA
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Oleinikova OV, Poitrasson F, Drozdova OY, Shirokova LS, Lapitskiy SA, Pokrovsky OS. Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:11183-11194. [PMID: 31483618 DOI: 10.1021/acs.est.9b02797] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Biodegradation and photolysis of dissolved organic matter (DOM) in boreal high-latitude waters are the two main factors controlling not only the aquatic fluxes and residence time of carbon but also metal nutrients associated with DOM such as Fe. The DOM is usually present in the form of organic and organomineral colloids, which also account for the majority of dissolved Fe. Here, we use the stable Fe isotope approach to unravel the processes controlling Fe behavior during bio- and photodegradation of colloids in boreal Fe- and DOM-rich humic waters (a stream and a fen). The adsorption of Fe colloids onto heterotrophic bacteria Pseudomonas aureofaciens produced enrichment in +0.4‰ (δ57Fe) in the heavier isotopes of the cell surface relative to the remaining solution. In contrast, long-term assimilation of Fe by live cells yielded preferential incorporation of lighter isotopes into the cells (-0.7‰ relative to aqueous solution). The sunlight-induced oxidation of Fe(II) in fen water led to the removal of heavier Fe isotopes (+1.5 to +2.5‰) from solution, consistent with Fe(III) hydroxide precipitation from Fe(II)-bearing solution. Altogether, bio- and photodegradation of organoferric colloids, occurring within a few days of exposure time, can produce several per mil isotopic excursions in shallow lentic and lothic inland waters of high-latitude boreal regions. Considerable daily scale variations of Fe isotopic composition should therefore be taken into account during the interpretation of the riverine flux of Fe isotopes to the ocean or tracing weathering processes using Fe isotopes in surface waters at high latitudes.
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Affiliation(s)
- Olga V Oleinikova
- Geosciences and Environment Toulouse (GET), UMR 5563 CNRS , 14 Avenue Edouard Belin , 31400 Toulouse , France
| | - Franck Poitrasson
- Geosciences and Environment Toulouse (GET), UMR 5563 CNRS , 14 Avenue Edouard Belin , 31400 Toulouse , France
| | - Olga Yu Drozdova
- Geological Faculty of Moscow State University , 1 Leninskie Gory , 119234 Moscow , Russia
| | - Liudmila S Shirokova
- Geosciences and Environment Toulouse (GET), UMR 5563 CNRS , 14 Avenue Edouard Belin , 31400 Toulouse , France
- N. Laverov Federal Center for Integrated Arctic Research , Russian Academy of Science , 23 Naberezhnaya Sev Dviny , 163000 Arkhangelsk , Russia
| | - Sergey A Lapitskiy
- Geological Faculty of Moscow State University , 1 Leninskie Gory , 119234 Moscow , Russia
| | - Oleg S Pokrovsky
- Geosciences and Environment Toulouse (GET), UMR 5563 CNRS , 14 Avenue Edouard Belin , 31400 Toulouse , France
- N. Laverov Federal Center for Integrated Arctic Research , Russian Academy of Science , 23 Naberezhnaya Sev Dviny , 163000 Arkhangelsk , Russia
- BIO-GEO-CLIM Laboratory , Tomsk State University , 36 Lenina Avenue , 634050 Tomsk , Russia
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9
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Koppel DJ, Adams MS, King CK, Jolley DF. Diffusive Gradients in Thin Films Can Predict the Toxicity of Metal Mixtures to Two Microalgae: Validation for Environmental Monitoring in Antarctic Marine Conditions. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:1323-1333. [PMID: 30790357 DOI: 10.1002/etc.4399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 01/20/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
Anthropogenic contamination in the Antarctic near-shore marine environment is a challenge for environmental managers because of its isolation, high costs associated with monitoring and remediation activities, and the current lack of Antarctic-specific ecotoxicological data. The present study investigated the application of diffusive gradients in thin films (DGT) with a Chelex-100 binding resin for metal contaminant assessment in Antarctic marine conditions. Diffusion coefficients for cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn), determined at 1 °C, ranged between 2.1 and 2.6×10-6 cm2 /s and were up to 32% lower than those derived by theoretical calculations. Competition of metals on the DGT binding resin was observed at subsaturation concentrations, reducing the effective capacity for metal uptake by approximately 60%. The lability of the dissolved (0.45 µm filterable) Cd, Cu, Pb, and Zn metal fraction to DGT was generally >90% and unaffected by the presence of the Antarctic marine microalga Phaeocystis antarctica. Both DGT and dissolved metal concentrations gave equivalent mixture toxicity predictions in independent action and concentration addition models to P. antarctica and Cryothecomonas armigera; that is, predictions using DGT-labile concentrations also showed antagonism to P. antarctica, which agrees with previously determined mixture interactivity. The benefits of DGT over traditional sampling techniques (i.e., discrete water sampling) include lower method detection limits (MDLs), in situ assessment, and time-averaged concentrations which capture pulses of contamination typical of the Antarctic near-shore marine environment. The present study provides MDLs and recommended minimum deployment times to guide field deployments in Antarctica. Environ Toxicol Chem 2019;38:1323-1333. © 2019 SETAC.
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Affiliation(s)
- Darren J Koppel
- School of Chemistry, University of Wollongong, Wollongong, New South Wales, Australia
- Faculty of Science, University of Technology, Sydney, Sydney, New South Wales, Australia
- CSIRO Land and Water, Lucas Heights, New South Wales, Australia
| | - Merrin S Adams
- CSIRO Land and Water, Lucas Heights, New South Wales, Australia
| | | | - Dianne F Jolley
- Faculty of Science, University of Technology, Sydney, Sydney, New South Wales, Australia
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10
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Wang R, Yang S, Fang J, Wang Z, Chen Y, Zhang D, Yang C. Characterizing the Interaction between Antibiotics and Humic Acid by Fluorescence Quenching Method. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15071458. [PMID: 29996545 PMCID: PMC6069084 DOI: 10.3390/ijerph15071458] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 06/22/2018] [Accepted: 07/05/2018] [Indexed: 11/16/2022]
Abstract
The method of Three-Dimensional Excitation Emission Matrix Fluorescence Spectrophotometer was used to identify the interaction mechanism between humic acid (HA) and antibiotics. The effects of antibiotic concentration, temperature, and pH on the bonding strength between HA and antibiotics were investigated. The results showed that with the increase of antibiotics concentration, the quenching effect on HA was enhanced. The quenching of HA by both oxytetracycline (OTC) and sulfadiazine (SD) is a single static quenching of the complexes, and the interaction forces are mainly a hydrogen bond and the van der Waals force. The quenching constant KsvOTC > KsvSD and the binding constant KbOTC > KbSD, indicates that HA has a more obvious quenching effect on OTC. The Kb of HA by OTC ranged from 3.223 × 10³ to 12.784 × 10³ L·mol−1 in the range of 298 K to 313 K, while the Kb of HA by SD ranged from 2.051 × 10³ to 5.533 × 10³ L·mol−1. With the increase of temperature, the quenching constant Ksv and binding constant Kb of both OTC and SD by HA gradually decrease, and the low temperature is beneficial to the interaction. The composite of OTC and HA is more stable than SD. Under neutral alkaline conditions, both OTC and SD had the strongest quenching effect on HA, and the resulting complex was the most stable. However, the Ksv and Kb of HA by OTC were greater than SD in the pH range of the experiment and the pH effect on quenching of HA by OTC (Ksv) was greater than that of SD.
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Affiliation(s)
- Runze Wang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Shengke Yang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Jie Fang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Zongzhou Wang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Yangyang Chen
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Dan Zhang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
| | - Chunyan Yang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
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Chupakova AA, Chupakov AV, Neverova NV, Shirokova LS, Pokrovsky OS. Photodegradation of river dissolved organic matter and trace metals in the largest European Arctic estuary. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 622-623:1343-1352. [PMID: 29890600 DOI: 10.1016/j.scitotenv.2017.12.030] [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: 07/22/2017] [Revised: 11/30/2017] [Accepted: 12/04/2017] [Indexed: 06/08/2023]
Abstract
Photo-induced degradation of dissolved organic matter (DOM) and organo-mineral colloids is one of the major factor responsible for transformation of DOM and dissolved metals in boreal and subarctic waters. In contrast to fairly good understanding of this process in inland waters of high latitude zone, the transformation of riverine DOM and associated trace element (TE) colloids in the Arctic estuaries remains virtually unknown. We incubated, under sunlight in outdoor pools, quartz reactors filled with mixtures of sterile filtered riverine and estuarine water. The water samples were collected in the estuarine zone of the largest European Arctic river, Severnaya Dvina. After 1month of exposure to sunlight, ≤5% change of dissolved organic carbon (DOC) concentration and specific ultraviolet (254nm) absorption occurred. This decrease was within the experimental uncertainty and it implies quite high resistance of river dissolved organic matter to photo-degradation in this estuary. Moreover, very low photodegradability of DOM in the freshwater point of the Severnaya Dvina River may require revisiting the current paradigm of the importance of DOC photolysis in large Arctic rivers. A novel finding was that the percentages of overall removal of Fe and some insoluble elements were quite similar across the full range of studied salinities, whereas the apparent rate of metal removal decreased with the increase of salinity. Overall, the salinity weakly impacted the removal of riverine DOC and metals in the estuarine water via photolysis and coagulation under sunlight. As a result, photoreactivity of DOM and dissolved metals in riverine end members corrected for estuarine dilution can be used to approximate the photolytic transformation of riverine material in the Arctic coastal zone.
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Affiliation(s)
- Anna A Chupakova
- N. Laverov Federal Center for Integrated Arctic Research, IEPS, Russian Academy of Science, Arkhangelsk, Russia
| | - Artem V Chupakov
- N. Laverov Federal Center for Integrated Arctic Research, IEPS, Russian Academy of Science, Arkhangelsk, Russia
| | - Natalia V Neverova
- N. Laverov Federal Center for Integrated Arctic Research, IEPS, Russian Academy of Science, Arkhangelsk, Russia
| | - Liudmila S Shirokova
- N. Laverov Federal Center for Integrated Arctic Research, IEPS, Russian Academy of Science, Arkhangelsk, Russia; Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, Toulouse, France
| | - Oleg S Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, Toulouse, France; BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russia.
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