Mercury stable isotopes for monitoring the effectiveness of the Minamata Convention on Mercury

Kwon, Sae Yun; Blum, Joel D.; Yin, Runsheng; Tsui, Martin Tsz‐Ki; Yang, Yo Han; Choi, Jong Woo

doi:10.1016/j.earscirev.2020.103111

Cited by 143 publications

(134 citation statements)

References 168 publications

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“…The dotted lines represent the median δ 202 Hg (−0.38‰) and ∆ 199 Hg (0.39‰) of precipitation compiled by Kwon et al. (2020).…”

Section: Resultsmentioning

confidence: 99%

“…While mercury concentrations in lake sediment cores have been evaluated on a broad spatiotemporal scale, sources as well as atmospheric and biogeochemical processes leading to spatiotemporal trends in mercury isotope ratios are only beginning to be understood. Mercury isotopes undergo mass‐dependent fractionation (MDF; δ 202 Hg) via various biotic and abiotic processes including methylation, demethylation, and mineral sorption (e.g., Blum et al., 2014; Kwon et al., 2020). Significant mass‐independent fractionation of odd‐mass number isotopes (MIF odd ; ∆ 199 Hg, Δ 201 Hg) has been observed primarily during photo‐reduction and photo‐degradation of Hg 2+ and MeHg, respectively (Bergquist & Blum, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal Characterization of Mercury Isotope Baselines and Anthropogenic Influences in Lake Sediment Cores

Lee

Kwon

Yin

et al. 2021

Global Biogeochemical Cycles

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Mercury is a globally distributed atmospheric pollutant, which travels long distances in the form of gaseous elemental mercury (Hg 0 ). Gaseous Hg 0 is removed from the atmosphere via the foliar uptake (Demers et al., 2013;Zhou et al., 2021) or via oxidation to Hg 2+ , which is readily deposited to the biosphere following sorption to particles (Hg P ) and/or precipitation (Selin, 2009). Since industrialization, anthropogenic activities alone have increased mercury emission by a factor of approximately 5 (Streets et al., 2017). Increased mercury loading to aquatic ecosystems can enhance microbial production of monomethylmercury (MeHg) (Benoit et al., 2003;Lindberg et al., 2007), which is a bioaccumulative toxin in food webs (Mergler et al., 2007). Humans are primarily exposed to MeHg via the consumption of fishery products (Sunderland, 2007).In 2017, the Minamata Convention on Mercury (MC), a multilateral agreement to mitigate anthropogenic mercury emissions and human health from mercury pollution, has entered into force (UNEP, 2019). As a part of the MC, provisions have been established for a global monitoring program and a convention effectiveness evaluation (Article 19, 22) to understand spatiotemporal changes in mercury levels as well as its sources, processes, and fate in various environmental media. Since then, numerous studies have assessed temporal trends of mercury in diverse atmospheric samples (Hg 0 , Hg 2+ , Hg P , precipitation) (Cheng et al., 2017;Dommergue et al., 2016) and biota (fish, bird eggs, polar bear) (Blukacz-Richards et al., 2017;Lee et al., 2016;McKinney et al., 2017) to gather insights on the changes in emissions, deposition, and ecosystem fate of mercury. Natural archives of sediment, peat, and ice cores have also been used to quantify long-term changes in the deposition of various atmospheric mercury species (Engstrom et al., 2014;Enrico

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“…The dotted lines represent the median δ 202 Hg (−0.38‰) and ∆ 199 Hg (0.39‰) of precipitation compiled by Kwon et al. (2020).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Characterization of Mercury Isotope Baselines and Anthropogenic Influences in Lake Sediment Cores

Lee

Kwon

Yin

et al. 2021

Global Biogeochemical Cycles

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“…In general, the mechanisms of potential stable Hg isotope fractionation, including oxidationreduction, volatilization, evaporation, and condensation, photochemical reactions, biochemical reactions (e.g., methylation) Yin et al, 2010b), generate a large d 202 Hg variability, up to 7& (Yin et al, 2010a), but larger variability from À6 to þ14.5& has also been reported (Kwon et al, 2020;Tsui et al, 2020).…”

Section: Hg Complexationmentioning

confidence: 99%

Metal isotope complexation with environmentally relevant surfaces: Opening the isotope fractionation black box

Komárek

Ratié

Vaňková

et al. 2021

Critical Reviews in Environmental Science and Technology

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The number of studies using various stable isotope systems for tracing contamination sources and various biogeochemical processes is rapidly rising due to the increased availability of the techniques used for isotope analyses. However, in most cases, the resulting isotope data are influenced by many processes occurring within reactive environmental compartments, e.g., soils and sediments, such as sorption, precipitation, redox changes, interactions with plants and microorganisms, etc. Therefore, isotope tracing becomes challenging as it is crucial to identify and quantify the isotope fractionation extent during separate processes in this so-called "isotope fractionation black box". The main aim of this review is to (i) summarize literature data on fractionation of selected metal isotopes (Cd, Cu, Hg, Ni, Zn) after complexation with relevant environmental surfaces, e.g., oxyhydroxides, clay minerals, natural organic matter etc., (ii) briefly describe the analytical techniques and key procedures used for the determination of such data and (iii) provide suggestions and perspectives for future research, including a critical evaluation of specific issues related to isotope analyses and especially the interpretation of results. For example, concentration equilibrium usually differs from isotope fractionation equilibrium, metal coordination chemistry in solution is crucial to decipher metal isotopic fractionation, spectroscopic data are missing, different experimental conditions are often and potential precipitation and desorption reactions are not always considered, etc. Consistent presentation of adsorption/complexation data would also be highly beneficial in future studies.

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“…And yet, a significant achievement of the efforts of scientists, practitioners, international organizations, the public was a significant reduction in Hg concentrations in the produc-tion environment. Not only the sources of Hg in the body, but also the current levels have fundamentally changed [17,2]. Today, most of them are low-intensity factors.…”

Section: A New Concept Of the Contribution Of Floramentioning

confidence: 99%

Toxico-ecological Analysis of Mercury-contained Waste Management in Ukraine

Pykhteyeva

Bolshoy

Shafran

2020

UJMTA

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Relevance. The multifaceted intersectoral problem of human security in contact with mercury has gained global significance in the twentieth century, it is relevant today. Considerable attention is paid to the environmental and hygienic aspects of mercury hazards in the field related to the production and disposal of waste containing Hg. The Aim of the Research. Analyze the data of own research on mercury content in the environment in connection with the management of mercury-containing waste and justify a set of preventive environmental and hygienic, technological and organizational measures to improve safety, public health and improve the environment in the region and the country in general. Materials and Methods. Sampling, sample preparation and determination of mercury content in environmental facilities and bioassays were performed according to MI “Methodical instructions for the determination of mercury in biological material, air, drinking water, food products and the environment.” The concentration of mercury was measured by the method of AAS “cold steam” on the upgraded device “Yulia-2M”. The mercury content in soil and air at the spontaneous dump of mercury lamps in Odessa region, on the border of the sanitary protection zone and in the air of the working zone of the enterprise for utilization of mercury lamps was studied. For sample preparation, chemically pure nitric acid (56%) was used, to reduce mercury during the analysis of chemically pure tin (II) chloride. Results and Conclusions. Mercury lamps have been shown to be hazardous to the environment and human health without proper disposal. Mercury lamps should be collected and disposed of as hazardous waste not only in industrial facilities but also in the general public. The formation of spontaneous unauthorized landfills of mercury lamps is unacceptable. The problem of environmental monitoring needs to be addressed at the state level with the mandatory involvement of specialists in the field of hygiene, toxicology and analytical chemistry of heavy metals in cases of violations to assess the level of danger and make informed decisions on approaches to elimination of mercury sources. Key Words: mercury, mercury lamps, ecology.

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Mercury stable isotopes for monitoring the effectiveness of the Minamata Convention on Mercury

Cited by 143 publications

References 168 publications

Spatiotemporal Characterization of Mercury Isotope Baselines and Anthropogenic Influences in Lake Sediment Cores

Spatiotemporal Characterization of Mercury Isotope Baselines and Anthropogenic Influences in Lake Sediment Cores

Metal isotope complexation with environmentally relevant surfaces: Opening the isotope fractionation black box

Toxico-ecological Analysis of Mercury-contained Waste Management in Ukraine

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