1
|
Palmer MJ, Richardson M, Chételat J, Spence C, Connon R, Jamieson HE. Watershed hydrology mediates the recovery of an arsenic impacted subarctic landscape. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 358:124480. [PMID: 38968985 DOI: 10.1016/j.envpol.2024.124480] [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: 02/08/2024] [Revised: 06/15/2024] [Accepted: 06/29/2024] [Indexed: 07/07/2024]
Abstract
A holistic understanding of the chemical recovery of lakes from arsenic (As) pollution requires consideration of within-lake biogeochemical cycling of As and processes occurring in the surrounding catchment. This study used a watershed mass balance approach, complemented by experimental sediment incubations, to assess the mobility and transport of As within a subarctic watershed (155 km2) impacted by more than 60 years of atmospheric mining emissions. The period of record spanned a transition from drought to high streamflow between September 2017 and September 2019, which yielded insights into the interacting effects of hydrology and within-lake biogeochemical cycling of As. Internal loading of As from contaminated lake sediments (25-46 kg As year-1) and contributions from terrestrial sources (16-56 kg As yr-1) continue to negatively impact lake water quality (19-144 μg As L-1), but the relative importance of these loads varies seasonally and inter-annually in response to changing hydrological conditions. Wet conditions resulted in greater transport of As from terrestrial reservoirs and upstream areas, shorter lake water retention time, and increased the downstream export of As. During dry periods, the lake was disconnected from the surrounding watershed resulting in limited terrestrial contributions and longer lake water residence time, which delayed recovery due to the greater relative influence of internal loading from contaminated sediments. This study highlights that changing hydroclimatic regimes will alter trajectories of chemical recovery for arsenic impacted lakes through the coupling of within-lake and watershed transport processes.
Collapse
Affiliation(s)
- Michael J Palmer
- North Slave Research Centre, Aurora Research Institute, Aurora College, Yellowknife, NT, Canada; Department of Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada.
| | - Murray Richardson
- Department of Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada
| | - John Chételat
- Environment and Climate Change Canada, Ottawa, ON, Canada
| | - Chris Spence
- Environment and Climate Change Canada, Saskatoon, SK, Canada
| | - Ryan Connon
- Environment and Climate Change, Government of the Northwest Territories, Yellowknife, NT, Canada
| | - Heather E Jamieson
- Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, ON, Canada
| |
Collapse
|
2
|
Lum JE, Schoepfer VA, Jamieson HE, McBeth JM, Radková AB, Walls MP, Lindsay MBJ. Arsenic and antimony geochemistry of historical roaster waste from the Giant Mine, Yellowknife, Canada. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:132037. [PMID: 37459758 DOI: 10.1016/j.jhazmat.2023.132037] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 07/26/2023]
Abstract
Historical mining and mineral processing at the former Giant Mine (Yellowknife, NT, Canada) created an enduring legacy of arsenic (As) and antimony (Sb) contamination. Approximately 237,000 tonnes of arsenic trioxide roaster waste (ATRW) generated between 1948 and 1999 remains stored on-site in underground chambers. We studied the chemical forms and phase associations of As and Sb to improve understanding of ATRW environmental behavior. Although arsenolite [As2O3] is the principal As and Sb host, we also observed minor associations of As with Fe oxides. Arsenic K-edge X-ray absorption spectroscopy (XAS) revealed As(III) dominated ATRW, with some As(V) and As(-I) also present. Arsenic coordination and bonding is consistent with arsenolite, while scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) showed minor As association with Fe oxides and arsenopyrite [FeAsS]. Antimony K-edge XAS revealed variable proportions of Sb(III) and Sb(V), with Sb-O, Sb-Sb and Sb-As bonding consistent with stibioclaudetite [AsSbO3] or Sb-substituted arsenolite. Electron microprobe analysis (EMPA) results showed variable but quantitative Sb substitution for As in arsenolite grains, possibly influencing ATRW solubility and reactivity under environmental conditions. Overall, our results reveal complex As and Sb phase associations with important implications for ongoing remediation efforts and long-term environmental fate of ATRW solids.
Collapse
Affiliation(s)
- Jullieta E Lum
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
| | - Valerie A Schoepfer
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada.
| | - Heather E Jamieson
- Department of Geology, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada
| | - Joyce M McBeth
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada; Department of Geological Sciences and Geological Engineering, Queen's University, 36 Union St, Kingston, ON K7L 3N6, Canada
| | | | - Mary P Walls
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
| | - Matthew B J Lindsay
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada.
| |
Collapse
|
3
|
Geng A, Lian W, Wang X, Chen G. Regulatory Mechanisms Underlying Arsenic Uptake, Transport, and Detoxification in Rice. Int J Mol Sci 2023; 24:11031. [PMID: 37446207 DOI: 10.3390/ijms241311031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/15/2023] Open
Abstract
Arsenic (As) is a metalloid environmental pollutant ubiquitous in nature that causes chronic and irreversible poisoning to humans through its bioaccumulation in the trophic chain. Rice, the staple food crop for 350 million people worldwide, accumulates As more easily compared to other cereal crops due to its growth characteristics. Therefore, an in-depth understanding of the molecular regulatory mechanisms underlying As uptake, transport, and detoxification in rice is of great significance to solving the issue of As bioaccumulation in rice, improving its quality and safety and protecting human health. This review summarizes recent studies on the molecular mechanisms of As toxicity, uptake, transport, redistribution, regulation, and detoxification in rice. It aims to provide novel insights and approaches for preventing and controlling As bioaccumulation in rice plants, especially reducing As accumulation in rice grains.
Collapse
Affiliation(s)
- Anjing Geng
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Wenli Lian
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Xu Wang
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Guang Chen
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| |
Collapse
|
4
|
Kay ML, Jasiak I, Klemt WH, Wiklund JA, Faber JA, MacDonald LA, Telford JVK, Savage CAM, Cooke CA, Wolfe BB, Hall RI. Paleolimnological evaluation of metal(loid) enrichment from oil sands and gold mining operations in northwestern Canada. ENVIRONMENTAL RESEARCH 2023; 216:114439. [PMID: 36174760 DOI: 10.1016/j.envres.2022.114439] [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: 05/11/2022] [Revised: 08/22/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Abundant reserves of metals and oil have spurred large-scale mining developments across northwestern Canada during the past 80 years. Historically, the associated emissions footprint of hazardous metal(loid)s has been difficult to identify, in part, because monitoring records are too short and sparse to have characterized their natural concentrations before mining began. Stratigraphic analysis of lake sediment cores has been employed where concerns of pollution exist to determine pre-disturbance metal(loid) concentrations and quantify the degree of enrichment since mining began. Here, we synthesize the current state of knowledge via systematic re-analysis of temporal variation in sediment metal(loid) concentrations from 51 lakes across four key regions spanning 670 km from bitumen mining in the Alberta Oil Sands Region (AOSR) to gold mining (Giant and Con mines) at Yellowknife in central Northwest Territories. Our compilation includes upland and floodplain lakes at varying distances from the mines to evaluate dispersal of pollution-indicator metal(loid)s from bitumen (vanadium and nickel) and gold mining (arsenic and antimony) via atmospheric and fluvial pathways. Results demonstrate 'severe' enrichment of vanadium and nickel at near-field sites (≤20 km) within the AOSR and 'severe' (near-field; ≤ 40 km) to 'considerable' (far-field; 40-80 km) enrichment of arsenic and antimony due to gold mining at Yellowknife via atmospheric pathways, but no evidence of enrichment of vanadium or nickel via atmospheric or fluvial pathways at the Peace-Athabasca Delta and Slave River Delta. Findings can be used by decision makers to evaluate risks associated with contaminant dispersal by the large-scale mining activities. In addition, we reflect upon methodological approaches to be considered when evaluating paleolimnological data for evidence of anthropogenic contributions to metal(loid) deposition and advocate for proactive inclusion of paleolimnology in the early design stage of environmental contaminant monitoring programs.
Collapse
Affiliation(s)
- Mitchell L Kay
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
| | - Izabela Jasiak
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Wynona H Klemt
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Johan A Wiklund
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Jelle A Faber
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, Ontario, N2L 3C5, Canada
| | - Lauren A MacDonald
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - James V K Telford
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada; Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, Ontario, N2L 3C5, Canada; Ministry of Forests, Lands, Natural Resource Operations & Rural Development Victoria, British Columbia, V8W 9M1, Canada
| | - Cory A M Savage
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Colin A Cooke
- Alberta Environment and Parks, Government of Alberta, Edmonton, Alberta, T5J 5C6, Canada; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, T6G 2E3, Canada
| | - Brent B Wolfe
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, Ontario, N2L 3C5, Canada
| | - Roland I Hall
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| |
Collapse
|
5
|
Li M, Chen Y, Feng Y, Li X, Ye L, Jiang J. Ecological Responses of Maize Rhizosphere to Antibiotics Entering the Agricultural System in an Area with High Arsenicals Geological Background. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13559. [PMID: 36294139 PMCID: PMC9603512 DOI: 10.3390/ijerph192013559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/08/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Metal(loid)s can promote the spread and enrichment of antibiotic resistance in the environmental ecosystem through a co-selection effect. Little is known about the ecological effects of entering antibiotics into the environment with long-term metal(loid)s' resistance profiles. Here, cow manure containing oxytetracycline (OTC) or sulfadiazine (SA) at four concentrations (0 (as control), 1, 10, and 100 mg/kg) was loaded to a maize cropping system in an area with high a arsenicals geological background. Results showed that exogenous antibiotics entering significantly changed the nutrient conditions, such as the concentration of nitrate nitrogen, ammonium nitrogen, and available phosphorus in the maize rhizosphere soil, while total arsenic and metals did not display any differences in antibiotic treatments compared with control. Antibiotics exposure significantly influenced nitrate and nitrite reductase activities to reflect the inhibition of denitrification rates but did not affect the soil urease and acid phosphatase activities. OTC treatment also did not change soil dehydrogenase activities, while SA treatment posed promotion effects, showing a tendency to increase with exposure concentration. Both the tested antibiotics (OTC and SA) decreased the concentration of arsenite and arsenate in rhizosphere soil, but the inhibition effects of the former were higher than that of the latter. Moreover, antibiotic treatment impacted arsenite and arsenate levels in maize root tissue, with positive effects on arsenite and negative effects on arsenate. As a result, both OTC and SA treatments significantly increased bioconcentration factors and showed a tendency to first increase and then decrease with increasing concentration. In addition, the treatments decreased translocation capacity of arsenic from roots to shoots and showed a tendency to increase translocation factors with increasing concentration. Microbial communities with arsenic-resistance profiles may also be resistant to antibiotics entering.
Collapse
Affiliation(s)
- Mengli Li
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
- Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| | - Yongshan Chen
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Ying Feng
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Xiaofeng Li
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Lili Ye
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Jinping Jiang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
- Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
6
|
Xu DM, Fu RB. A typical case study from smelter-contaminated soil: new insights into the environmental availability of heavy metals using an integrated mineralogy characterization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:57296-57305. [PMID: 35352226 DOI: 10.1007/s11356-022-19823-6] [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: 01/27/2022] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Mineralogy was an important driver for the environmental release of heavy metals. Therefore, the present work was conducted by coupling mineral liberation analyzer (MLA) with complementary geochemical tests to evaluate the geochemical behaviors and their potential environmental risks of heavy metals in the smelter contaminated soil. MLA analysis showed that the soil contained 34.0% of quartz, 17.15% of biotite, 1.36% of metal sulfides, 19.48% of metal oxides, and 0.04% of gypsum. Moreover, As, Pb, and Zn were primarily hosted by arsenopyrite (29.29%), galena (88.41%), and limonite (24.15%), respectively. The integrated geochemical results indicated that among the studied metals, Cd, Cu, Mn, Pb, and Zn were found to be more bioavailable, bioaccessible, and mobile. Based on the combined mineralogical and geochemical results, the environmental release of smelter-driven elements such as Cd, Cu, Mn, Pb, and Zn were mainly controlled by the acidic dissolution of minerals with neutralizing potential, the reductive dissolution of Fe/Mn oxides, and the partial oxidation of metal sulfide minerals. The present study results have confirmed the great importance of mineralogy analysis and geochemical approaches to explain the contribution of smelting activities to soil pollution risks.
Collapse
Affiliation(s)
- Da-Mao Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
- Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai, 200092, People's Republic of China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China
| | - Rong-Bing Fu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China.
- Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai, 200092, People's Republic of China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China.
| |
Collapse
|
7
|
Xu DM, Fu RB, Wang JX, An BH. The geochemical behaviors of potentially toxic elements in a typical lead/zinc (Pb/Zn) smelter contaminated soil with quantitative mineralogical assessments. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127127. [PMID: 34601404 DOI: 10.1016/j.jhazmat.2021.127127] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 08/24/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
This study comprehensively investigated the potential roles of soil mineralogy identified by the automated mineral liberation analysers (MLA) in the prediction of geochemical behavior of toxic metals in the smelter polluted soils. The results from modal mineralogy revealed that the non-reactive silicate phases such as quartz (42.05%) and biotite (40.43%) were the major mineralogical phases. The element deportment showed that fayalite, lead oxide, apatite, galena and wollastonite were identified as the dominant As, Cd, Pb and Zn bearing minerals. Furthermore, MLA analysis also confirmed that Pb was most concentrated in the smaller particles of lead oxide, which significantly enhanced Pb release in reaction with the chemical extractant during chemical kinetic tests. The results from pH-dependent leaching tests indicated that the leaching concentrations of As, Pb and Zn increased at low and high pH values, but were lowest at the neutral pH range. In addition, the results from the kinetic study demonstrated that the second order model provided the best description for the release patterns of the main metal contaminants in the bioavailability and bioaccessibility tests. The integrated geochemical analysis demonstrated that among these studied elements, As showed a typical geochemical pattern, which was predominantly controlled by 90.09% of fayalite. The above study results would have significant implications for soil remediation and risk management of smelter contaminated sites.
Collapse
Affiliation(s)
- Da-Mao Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Rong-Bing Fu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Jun-Xian Wang
- Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai 200092, PR China; Viterbi School of Engineering, University of Southern California, Los Angeles, CA 90089, United States
| | - Bai-Hong An
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| |
Collapse
|
8
|
Miller CB, Parsons MB, Jamieson HE, Ardakani OH, Patterson RT, Galloway JM. Mediation of arsenic mobility by organic matter in mining-impacted sediment from sub-Arctic lakes: implications for environmental monitoring in a warming climate. ENVIRONMENTAL EARTH SCIENCES 2022; 81:137. [PMID: 35222729 PMCID: PMC8850223 DOI: 10.1007/s12665-022-10213-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 01/06/2022] [Indexed: 05/13/2023]
Abstract
UNLABELLED Arsenic (As) is commonly sequestered at the sediment-water interface (SWI) in mining-impacted lakes through adsorption and/or co-precipitation with authigenic iron (Fe)-(oxy)hydroxides or sulfides. The results of this study demonstrate that the accumulation of organic matter (OM) in near-surface sediments also influences the mobility and fate of As in sub-Arctic lakes. Sediment gravity cores, sediment grab samples, and porewaters were collected from three lakes downstream of the former Tundra gold mine, Northwest Territories, Canada. Analysis of sediment using combined micro-X-ray fluorescence/diffraction, K-edge X-ray Absorption Near-Edge Structure (XANES), and organic petrography shows that As is associated with both aquatic (benthic and planktonic alginate) and terrestrially derived OM (e.g., cutinite, funginite). Most As is hosted by fine-grained Fe-(oxy)hydroxides or sulfide minerals (e.g., goethite, orpiment, lepidocrocite, and mackinawite); however, grain-scale synchrotron-based analysis shows that As is also associated with amorphous OM. Mixed As oxidation states in porewater (median = 62% As (V), 18% As (III); n = 20) and sediment (median = 80% As (-I) and (III), 20% As (V); n = 9) indicate the presence of variable redox conditions in the near-surface sediment and suggest that post-depositional remobilization of As has occurred. Detailed characterization of As-bearing OM at and below the SWI suggests that OM plays an important role in stabilizing redox-sensitive authigenic minerals and associated As. Based on these findings, it is expected that increased concentrations of labile OM will drive post-depositional surface enrichment of As in mining-impacted lakes and may increase or decrease As flux from sediments to overlying surface waters. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12665-022-10213-2.
Collapse
Affiliation(s)
- Clare B. Miller
- Centre for Ore Deposits and Earth Sciences (CODES), Department of Earth Science, University of Tasmania, Hobart, TAS 7001 Australia
- Department of Geological Sciences and Geological Engineering, Queen’s University, Kingston, ON K7L 3N6 Canada
| | - Michael B. Parsons
- Department of Geological Sciences and Geological Engineering, Queen’s University, Kingston, ON K7L 3N6 Canada
- Geological Survey of Canada/Commission Géologique du Canada, Natural Resources Canada/Ressources Naturelles Canada, 1 Challenger Drive, Dartmouth, NS B2Y 4A2 Canada
| | - Heather E. Jamieson
- Department of Geological Sciences and Geological Engineering, Queen’s University, Kingston, ON K7L 3N6 Canada
| | - Omid H. Ardakani
- Geological Survey of Canada/Commission Géologique du Canada, Natural Resources Canada/Ressources Naturelles Canada, 3303 - 33 Street N.W., Calgary, AB T2L 2A7 Canada
| | - R. Timothy Patterson
- Ottawa‐Carleton Geoscience Centre, Department of Earth Sciences, Carleton University, Ottawa, ON KIS 5B6 Canada
| | - Jennifer M. Galloway
- Geological Survey of Canada/Commission Géologique du Canada, Natural Resources Canada/Ressources Naturelles Canada, 3303 - 33 Street N.W., Calgary, AB T2L 2A7 Canada
- Ottawa‐Carleton Geoscience Centre, Department of Earth Sciences, Carleton University, Ottawa, ON KIS 5B6 Canada
| |
Collapse
|
9
|
Leclerc É, Venkiteswaran JJ, Jasiak I, Telford JV, Schultz MDJ, Wolfe BB, Hall RI, Couture RM. Quantifying arsenic post-depositional mobility in lake sediments impacted by gold ore roasting in sub-arctic Canada using inverse diagenetic modelling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 288:117723. [PMID: 34256286 DOI: 10.1016/j.envpol.2021.117723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 06/21/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
Lake sediments are widely used as environmental archives to reconstruct past changes in contaminants deposition, provided that they remain immobile after deposition. Arsenic (As) is a redox-sensitive element that may be redistributed in the sediments during early diagenesis, for instance along with iron and manganese, and thus depth profiles of As might not provide a reliable, unaltered record of past deposition. Here, we use inverse diagenetic modelling to calculate fluxes of As across the sediment-water interface and interpret As sedimentary records in eight lakes along a 80 km transect from the Giant and Con mines, Northwest Territories, Canada. The sediment cores were dated using 210Pb methods and analyzed for solid-phase and porewater As, Fe, Mn and organic C concentrations. We reconstructed the history of As deposition by correcting for the varying mobility patterns and calculated contemporary As deposition fluxes. Correction for diagenesis was substantial for three of the eight lakes, suggesting that lakes with lower sedimentation rates, which allows longer residence of As within the reactive zones defined by the model, enhance the influence of diagenesis. Results show that solid phase As peaks coincides with the period of high emissions from past gold ore roasting activities. Results also show that sediments sustained present-day As fluxes to the water column of study lakes within 50 km of the mines, while sediment in study lakes further than 50 km acted as As sinks instead.
Collapse
Affiliation(s)
- Émilie Leclerc
- Centre for Northern Studies (CEN), Takuvik Joint International Laboratory, and Department of Chemistry, Université Laval, Quebec City, QC, Canada
| | - Jason J Venkiteswaran
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Izabela Jasiak
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - James V Telford
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Mackenzie D J Schultz
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Brent B Wolfe
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Roland I Hall
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Raoul-Marie Couture
- Centre for Northern Studies (CEN), Takuvik Joint International Laboratory, and Department of Chemistry, Université Laval, Quebec City, QC, Canada.
| |
Collapse
|