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Zhen J, Li T, Cai H, Nie X, He S, Meng M, Wang Y, Chen J. Photoreduction and origin of dissolved and particulate mercury in cloud water: Insights from stable mercury isotopes. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134654. [PMID: 38810583 DOI: 10.1016/j.jhazmat.2024.134654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/25/2024] [Accepted: 05/17/2024] [Indexed: 05/31/2024]
Abstract
The photoreduction of mercury (Hg) in clouds is crucial for determining global Hg cycling. The recently-developed isotope approach provides new insight into the fate of atmospheric Hg, however, limited data have been reported on the dynamics of Hg isotopes in clouds. This study presented the isotopic compositions of dissolved mercury (DHg) and particulate mercury (PHg) in cloud water collected at Mt. Tai (1545 m a.s.l.) in eastern China during summer 2021. Both DHg and PHg exhibited positive mass-independent fractionation of odd isotopes (odd-MIF, denoted as Δ199Hg), with averaged Δ199Hg values of 0.83 ± 0.34‰ and 0.20 ± 0.11‰, respectively. This high odd-MIF likely resulted from aqueous photoreduction in clouds, with DHg being more susceptible to photolysis than PHg. Our findings indicated that the photoreduction was promoted by sunlight and influenced by the chemical compositions of cloud water that controlled the Hg(II) speciation. The isotope mixing model estimation revealed that particulate-bound Hg and reactive gaseous Hg constituted the principal sources of Hg in cloud water, accounting for 55% to 99% of the total, while gaseous element Hg also made a notable contribution. Additionally, cloud water samples with faster reduction rates of Hg(II) were located outside of the isotope mixing models, which indicated an enhanced photoreduction process in cloud water.
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Affiliation(s)
- Jiebo Zhen
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Tao Li
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China
| | - Hongming Cai
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
| | - Xiaoling Nie
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Sheng He
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
| | - Mei Meng
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
| | - Yan Wang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
| | - Jiubin Chen
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China.
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Li H, Meng F, Zhu P, Zu H, Yang Z, Qu W, Yang J. Biomimetic mercury immobilization by selenium functionalized polyphenylene sulfide fabric. Nat Commun 2024; 15:1292. [PMID: 38346957 PMCID: PMC10861514 DOI: 10.1038/s41467-024-45486-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 01/25/2024] [Indexed: 02/15/2024] Open
Abstract
Highly efficient decontamination of elemental mercury (Hg0) remains an enormous challenge for public health and ecosystem protection. The artificial conversion of Hg0 into mercury chalcogenides could achieve Hg0 detoxification and close the global mercury cycle. Herein, taking inspiration from the bio-detoxification of mercury, in which selenium preferentially converts mercury from sulfoproteins to HgSe, we propose a biomimetic approach to enhance the conversion of Hg0 into mercury chalcogenides. In this proof-of-concept design, we use sulfur-rich polyphenylene sulfide (PPS) as the Hg0 transporter. The relatively stable, sulfur-linked aromatic rings result in weak adsorption of Hg0 on the PPS rather than the formation of metastable HgS. The weakly adsorbed mercury subsequently migrates to the adjacent selenium sites for permanent immobilization. The sulfur-selenium pair affords an unprecedented Hg0 adsorption capacity and uptake rate of 1621.9 mg g-1 and 1005.6 μg g-1 min-1, respectively, which are the highest recorded values among various benchmark materials. This work presents an intriguing concept for preparing Hg0 adsorbents and could pave the way for the biomimetic remediation of diverse pollutants.
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Affiliation(s)
- Hailong Li
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Fanyue Meng
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Penglin Zhu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Hongxiao Zu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Zequn Yang
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Wenqi Qu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
| | - Jianping Yang
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China.
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Huang S, Wang F, Yuan T, Song Z, Wu P, Zhang Y. Modeling the Mercury Cycle in the Sea Ice Environment: A Buffer between the Polar Atmosphere and Ocean. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14589-14601. [PMID: 37585923 DOI: 10.1021/acs.est.3c05080] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Sea ice (including overlying snow) is a dynamic interface between the atmosphere and the ocean, influencing the mercury (Hg) cycling in polar oceans. However, a large-scale and process-based model for the Hg cycle in the sea ice environment is lacking, hampering our understanding of regional Hg budget and critical processes. Here, we develop a comprehensive model for the Hg cycle at the ocean-sea ice-atmosphere interface with constraints from observational polar cryospheric data. We find that seasonal patterns of average total Hg (THg) in snow are governed by snow thermodynamics and deposition, peaking in springtime (Arctic: 5.9 ng/L; Antarctic: 5.3 ng/L) and minimizing during ice formation (Arctic: 1.0 ng/L, Antarctic: 0.5 ng/L). Arctic and Antarctic sea ice exhibited THg concentration peaks in summer (0.25 ng/L) and spring (0.28 ng/L), respectively, governed by different snow Hg transmission pathways. Antarctic snow-ice formation facilitates Hg transfer to sea ice during spring, while in the Arctic, snow Hg is primarily moved through snowmelt. Overall, first-year sea ice acts as a buffer, receiving atmospheric Hg during ice growth and releasing it to the ocean in summer, influencing polar atmospheric and seawater Hg concentrations. Our model can assess climate change effects on polar Hg cycles and evaluate the Minamata Convention's effectiveness for Arctic populations.
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Affiliation(s)
- Shaojian Huang
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
| | - Feiyue Wang
- Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg MB R3T 2N2, Canada
| | - Tengfei Yuan
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
| | - Zhengcheng Song
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
| | - Peipei Wu
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
| | - Yanxu Zhang
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
- Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, Jiangsu, China
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Yue F, Angot H, Blomquist B, Schmale J, Hoppe CJM, Lei R, Shupe MD, Zhan L, Ren J, Liu H, Beck I, Howard D, Jokinen T, Laurila T, Quéléver L, Boyer M, Petäjä T, Archer S, Bariteau L, Helmig D, Hueber J, Jacobi HW, Posman K, Xie Z. The Marginal Ice Zone as a dominant source region of atmospheric mercury during central Arctic summertime. Nat Commun 2023; 14:4887. [PMID: 37580358 PMCID: PMC10425351 DOI: 10.1038/s41467-023-40660-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 08/01/2023] [Indexed: 08/16/2023] Open
Abstract
Atmospheric gaseous elemental mercury (GEM) concentrations in the Arctic exhibit a clear summertime maximum, while the origin of this peak is still a matter of debate in the community. Based on summertime observations during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition and a modeling approach, we further investigate the sources of atmospheric Hg in the central Arctic. Simulations with a generalized additive model (GAM) show that long-range transport of anthropogenic and terrestrial Hg from lower latitudes is a minor contribution (~2%), and more than 50% of the explained GEM variability is caused by oceanic evasion. A potential source contribution function (PSCF) analysis further shows that oceanic evasion is not significant throughout the ice-covered central Arctic Ocean but mainly occurs in the Marginal Ice Zone (MIZ) due to the specific environmental conditions in that region. Our results suggest that this regional process could be the leading contributor to the observed summertime GEM maximum. In the context of rapid Arctic warming and the observed increase in width of the MIZ, oceanic Hg evasion may become more significant and strengthen the role of the central Arctic Ocean as a summertime source of atmospheric Hg.
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Affiliation(s)
- Fange Yue
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hélène Angot
- Extreme Environments Research Laboratory, École Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis, Sion, Switzerland.
- Institute for Arctic and Alpine Research (INSTAAR), University of Colorado Boulder, Boulder, CO, USA.
- Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000, Grenoble, France.
| | - Byron Blomquist
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- NOAA, Physical Sciences Laboratory, Boulder, CO, USA
| | - Julia Schmale
- Extreme Environments Research Laboratory, École Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis, Sion, Switzerland
| | - Clara J M Hoppe
- Alfred Wegener Institut-Helmholtzzentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany
| | - Ruibo Lei
- Key Laboratory for Polar Science of the MNR, Polar Research Institute of China, Shanghai, China
| | - Matthew D Shupe
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- NOAA, Physical Sciences Laboratory, Boulder, CO, USA
| | - Liyang Zhan
- Third Institute of Oceanography, Ministry of natural resources, Xiamen, China
| | - Jian Ren
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
| | - Hailong Liu
- School of Oceanography, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ivo Beck
- Extreme Environments Research Laboratory, École Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis, Sion, Switzerland
| | - Dean Howard
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- NOAA, Physical Sciences Laboratory, Boulder, CO, USA
| | - Tuija Jokinen
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
- Climate & Atmosphere Research Centre (CARE-C), The Cyprus Institute, Nicosia, Cyprus
| | - Tiia Laurila
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - Lauriane Quéléver
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - Matthew Boyer
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - Tuukka Petäjä
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - Stephen Archer
- Bigelow Laboratory for Ocean Sciences, Boothbay, ME, USA
| | - Ludovic Bariteau
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- NOAA, Physical Sciences Laboratory, Boulder, CO, USA
| | - Detlev Helmig
- Boulder Atmosphere Innovation Research, Boulder, CO, USA
| | | | - Hans-Werner Jacobi
- Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000, Grenoble, France
| | - Kevin Posman
- Bigelow Laboratory for Ocean Sciences, Boothbay, ME, USA
| | - Zhouqing Xie
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
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Zhang H, Fu X, Wu X, Deng Q, Tang K, Zhang L, Sommar J, Sun G, Feng X. Using Mercury Stable Isotopes to Quantify Bidirectional Water-Atmosphere Hg(0) Exchange Fluxes and Explore Controlling Factors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023. [PMID: 37378655 DOI: 10.1021/acs.est.3c01273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
In this study, exchange fluxes and Hg isotope fractionation during water-atmosphere Hg(0) exchange were investigated at three lakes in China. Water-atmosphere exchange was overall characterized by net Hg(0) emissions, with lake-specific mean exchange fluxes ranging from 0.9 to 1.8 ng m-2 h-1, which produced negative δ202Hg (mean: -1.61 to -0.03‰) and Δ199Hg (-0.34 to -0.16‰) values. Emission-controlled experiments conducted using Hg-free air over the water surface at Hongfeng lake (HFL) showed negative δ202Hg and Δ199Hg in Hg(0) emitted from water, and similar values were observed between daytime (mean δ202Hg: -0.95‰, Δ199Hg: -0.25‰) and nighttime (δ202Hg: -1.00‰, Δ199Hg: -0.26‰). Results of the Hg isotope suggest that Hg(0) emission from water is mainly controlled by photochemical Hg(0) production in water. Deposition-controlled experiments at HFL showed that heavier Hg(0) isotopes (mean ε202Hg: -0.38‰) preferentially deposited to water, likely indicating an important role of aqueous Hg(0) oxidation played during the deposition process. A Δ200Hg mixing model showed that lake-specific mean emission fluxes from water surfaces were 2.1-4.1 ng m-2 h-1 and deposition fluxes to water surfaces were 1.2-2.3 ng m-2 h-1 at the three lakes. Results from the this study indicate that atmospheric Hg(0) deposition to water surfaces indeed plays an important role in Hg cycling between atmosphere and water bodies.
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Affiliation(s)
- Hui Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuewu Fu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Xian Wu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qianwen Deng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kaihui Tang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Leiming Zhang
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto M3H5T4, Ontario, Canada
| | - Jonas Sommar
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Guangyi Sun
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Xinbin Feng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Sonke JE, Angot H, Zhang Y, Poulain A, Björn E, Schartup A. Global change effects on biogeochemical mercury cycling. AMBIO 2023; 52:853-876. [PMID: 36988895 PMCID: PMC10073400 DOI: 10.1007/s13280-023-01855-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 02/07/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Past and present anthropogenic mercury (Hg) release to ecosystems causes neurotoxicity and cardiovascular disease in humans with an estimated economic cost of $117 billion USD annually. Humans are primarily exposed to Hg via the consumption of contaminated freshwater and marine fish. The UNEP Minamata Convention on Hg aims to curb Hg release to the environment and is accompanied by global Hg monitoring efforts to track its success. The biogeochemical Hg cycle is a complex cascade of release, dispersal, transformation and bio-uptake processes that link Hg sources to Hg exposure. Global change interacts with the Hg cycle by impacting the physical, biogeochemical and ecological factors that control these processes. In this review we examine how global change such as biome shifts, deforestation, permafrost thaw or ocean stratification will alter Hg cycling and exposure. Based on past declines in Hg release and environmental levels, we expect that future policy impacts should be distinguishable from global change effects at the regional and global scales.
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Affiliation(s)
- Jeroen E. Sonke
- Géosciences Environnement Toulouse, CNRS/IRD, Université Paul Sabatier Toulouse 3, 14 ave Edouard Belin, 31400 Toulouse, France
| | - Hélène Angot
- Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 1025 rue de la piscine, 38000 Grenoble, France
| | - Yanxu Zhang
- School of Atmospheric Sciences, Nanjing University, 163 Xianlin Road, Nanjing, 210023 Jiangsu China
| | - Alexandre Poulain
- Department of Biology, University of Ottawa, Ottawa, ON K1N6N5 Canada
| | - Erik Björn
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - Amina Schartup
- Geosciences Research Division, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
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