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Li C, Chen J, Angot H, Zheng W, Shi G, Ding M, Du Z, Zhang Q, Ma X, Kang S, Xiao C, Ren J, Qin D. Seasonal Variation of Mercury and Its Isotopes in Atmospheric Particles at the Coastal Zhongshan Station, Eastern Antarctica. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11344-11355. [PMID: 32822538 DOI: 10.1021/acs.est.0c04462] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mercury (Hg) is a globally spread trace metal due to its long atmospheric residence time. Yet, our understanding of atmospheric processes (e.g., redox reactions and deposition) driving Hg cycling is still limited, especially in polar regions. The Antarctic continent, by virtue of its remoteness, is the perfect location to investigate Hg atmospheric processes in the absence of significant local anthropogenic impact. Here, we present the first 2 year record (2016-2017) of total suspended particulate mercury (PHg) concentrations along with a year-round determination of an Hg stable isotopic composition in particles collected at Zhongshan Station (ZSS), eastern Antarctic coast. The mean PHg concentration is 21.8 ± 32.1 pg/m3, ranging from 0.9 to 195.6 pg/m3, and peaks in spring and summer. The negative mass-independent fractionation of odd Hg isotopes (odd-MIF, average -0.38 ± 0.12‰ for Δ199Hg) and the slope of Δ199Hg/Δ201Hg with 0.91 ± 0.12 suggest that the springtime isotope variation of PHg is likely caused by in situ photo-oxidation and reduction reactions. On the other hand, the increase of PHg concentrations and the observed odd-MIF values in summer are attributed to the transport by katabatic winds of divalent species derived from the oxidation of elemental Hg in the inland Antarctic Plateau.
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Affiliation(s)
- Chuanjin Li
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
| | - Jiubin Chen
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
| | - Hélène Angot
- Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, United States
| | - Wang Zheng
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
| | - Guitao Shi
- Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences and State Key Lab of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
- Polar Research Institute of China, Shanghai 200062, China
| | - Minghu Ding
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
- Institute of Tibetan Plateau and Polar Regions Meteorology, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Zhiheng Du
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
| | - Qianggong Zhang
- Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiangyu Ma
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
| | - Shichang Kang
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
| | - Cunde Xiao
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
| | - Jiawen Ren
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
| | - Dahe Qin
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,China
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Xu Q, Chu Z, Gao Y, Mei Y, Yang Z, Huang Y, Yang L, Xie Z, Sun L. Levels, sources and influence mechanisms of heavy metal contamination in topsoils in Mirror Peninsula, East Antarctica. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 257:113552. [PMID: 31771929 DOI: 10.1016/j.envpol.2019.113552] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 10/19/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Heavy metal contaminants in Mirror Peninsula, East Antarctica, have rarely been studied and the source and influencing factors are poorly understood. We sampled a grid of 189 topsoil samples from Mirror Peninsula and analyzed the concentrations of Zn, Cu, U, Cr, Ga, Pb, Hg, Se and As; we also calculated the chemical index of alteration (CIA), a proxy of weathering. The results show that the distributions of Cr, Ga, Cu, and Zn are associated with weathering; the distributions of As and Pb are related to vehicle use and unloading activities at the wharfs, respectively; and the distribution of Hg is likely associated with both anthropogenic impacts and biological activity. The contamination level of these heavy metals in Mirror Peninsula is relatively low and within the controllable range. Both weathering processes and anthropogenic impacts can cause the enrichment of heavy metals; thus reliable source apportionment is crucial in studying heavy metal enrichment and contamination.
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Affiliation(s)
- Qibin Xu
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Zhuding Chu
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yuesong Gao
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yanjun Mei
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal Universtiy, Shanghai 200241, China
| | - Zhongkang Yang
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yikang Huang
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Lianjiao Yang
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Zhouqing Xie
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China.
| | - Liguang Sun
- Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China.
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Han D, Fu Q, Gao S, Hu Z, Zhang X, Chen X, Feng J, Cheng J, Wang W. Two-year monitoring of gaseous elementary mercury in a typical iron-steel plant in Yangtze River Delta, China: Characterization and estimation of its dynamic oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 657:1217-1226. [PMID: 30677888 DOI: 10.1016/j.scitotenv.2018.12.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/09/2018] [Accepted: 12/09/2018] [Indexed: 06/09/2023]
Abstract
A two-year gaseous elementary mercury (GEM) measurement was implemented at an iron-steel plant in Yangtze River Delta, China, which provided an excellent opportunity to investigate their dynamic cycling. The hourly GEM concentrations ranged between 0.78 and 113.8 ng m-3, with a mean value of 3.83 ± 2.53 ng m-3. Temporally, seasonal GEM contents decreased as winter ≈ spring > summer > autumn, while diurnal cycling was observed with a steady decrease at 14:00-17:00. GEM variations were found to be related to source emissions, meteorology and regional transportation. Three major oxidants (O3, Br and OH radicals) were used to evaluate GEM oxidation in the daytime, and the estimated GEM depletion rate was 70.8 ± 52.5 molecule cm-3 s-1 (0.09 ± 0.06 ng m-3 h-1). The GEM oxidized by Br radicals accounted for 83.4% of the total GEM oxidation rate, followed by O3 (13.8%). The estimated atmospheric lifetime of GEM was 22.9 to 345.2 days, which implies a major contribution of Br radicals to the GEM sink. These findings highlight the ability of iron-steel industry emissions and in-situ oxidation to affect daily local GEM cycling significantly.
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Affiliation(s)
- Deming Han
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qingyan Fu
- Shanghai Environmental Monitor Center, Shanghai 200235, China
| | - Song Gao
- Shanghai Environmental Monitor Center, Shanghai 200235, China; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Zihao Hu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xufeng Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaolin Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jingjing Feng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jinping Cheng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Wenhua Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Use of Gold Nanoparticles as Substrate for Diffusive Monitoring of Gaseous Mercury. MATERIALS 2018; 11:ma11112119. [PMID: 30373322 PMCID: PMC6266097 DOI: 10.3390/ma11112119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/17/2018] [Accepted: 10/24/2018] [Indexed: 12/24/2022]
Abstract
In the present work, the study and the performances of an adsorbent material for gaseous mercury employed in different diffusive bodies geometries is presented. The material is based on gold nanoparticles (AuNPs) deposited on quartz fibres filters, suitable for bonding the gaseous mercury through an amalgamation process. Following thermal desorption and analysis, the behavior of different diffusive samplers prototypes was compared. Both indoor and outdoor exposures were carried out in order to evaluate the advantages and shortcomings of the geometries in study at different sites. From the outdoor long-term exposures, a constant uptake rate (Ur), with a low influence coming from the environmental conditions, was observed for the axial geometry, reporting a high coefficient of determination (R2 0.97). Indoor exposures showed a higher reproducibility, along with a higher coefficient of determination (R2 0.99). The presented results allowed us to observe different behaviors coming from two kinds of diffusive samplers designs, showing different adsorption rates and data dispersion. This allowed us to focalize our attention on the most suitable design from these two tested prototypes, for this kind of adsorbent material.
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Spolaor A, Angot H, Roman M, Dommergue A, Scarchilli C, Vardè M, Del Guasta M, Pedeli X, Varin C, Sprovieri F, Magand O, Legrand M, Barbante C, Cairns WRL. Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau. CHEMOSPHERE 2018; 197:306-317. [PMID: 29353680 DOI: 10.1016/j.chemosphere.2017.12.180] [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: 09/12/2017] [Revised: 12/21/2017] [Accepted: 12/28/2017] [Indexed: 06/07/2023]
Abstract
The Antarctic Plateau snowpack is an important environment for the mercury geochemical cycle. We have extensively characterized and compared the changes in surface snow and atmospheric mercury concentrations that occur at Dome C. Three summer sampling campaigns were conducted between 2013 and 2016. The three campaigns had different meteorological conditions that significantly affected mercury deposition processes and its abundance in surface snow. In the absence of snow deposition events, the surface mercury concentration remained stable with narrow oscillations, while an increase in precipitation results in a higher mercury variability. The Hg concentrations detected confirm that snowfall can act as a mercury atmospheric scavenger. A high temporal resolution sampling experiment showed that surface concentration changes are connected with the diurnal solar radiation cycle. Mercury in surface snow is highly dynamic and it could decrease by up to 90% within 4/6 h. A negative relationship between surface snow mercury and atmospheric concentrations has been detected suggesting a mutual dynamic exchange between these two environments. Mercury concentrations were also compared with the Br concentrations in surface and deeper snow, results suggest that Br could have an active role in Hg deposition, particularly when air masses are from coastal areas. This research presents new information on the presence of Hg in surface and deeper snow layers, improving our understanding of atmospheric Hg deposition to the snow surface and the possible role of re-emission on the atmospheric Hg concentration.
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Affiliation(s)
- Andrea Spolaor
- CNR-Institute for the Dynamics of Environmental Processes (IDPA), 30172, Venice-Mestre, Italy.
| | - Hélène Angot
- Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, Institut des Géosciences de l'Environnement (IGE), 38000, Grenoble, France
| | - Marco Roman
- CNR-Institute for the Dynamics of Environmental Processes (IDPA), 30172, Venice-Mestre, Italy
| | - Aurélien Dommergue
- Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, Institut des Géosciences de l'Environnement (IGE), 38000, Grenoble, France
| | | | - Massimiliano Vardè
- CNR-Institute for the Dynamics of Environmental Processes (IDPA), 30172, Venice-Mestre, Italy
| | | | - Xanthi Pedeli
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, 30172, Venice -Mestre, Italy
| | - Cristiano Varin
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, 30172, Venice -Mestre, Italy
| | - Francesca Sprovieri
- CNR-Institute of Atmospheric Pollution Research (IIA), Division of Rende, 87036, Rende, Italy
| | - Olivier Magand
- Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, Institut des Géosciences de l'Environnement (IGE), 38000, Grenoble, France
| | - Michel Legrand
- Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, Institut des Géosciences de l'Environnement (IGE), 38000, Grenoble, France
| | - Carlo Barbante
- CNR-Institute for the Dynamics of Environmental Processes (IDPA), 30172, Venice-Mestre, Italy; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, 30172, Venice -Mestre, Italy
| | - Warren R L Cairns
- CNR-Institute for the Dynamics of Environmental Processes (IDPA), 30172, Venice-Mestre, Italy
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