Mercury isotope fractionation during transfer from post-desulfurized seawater to air

Huang, Shuyuan; Lin, Kunning; Yuan, Dongxing; Gao, Yaqin; Sun, Lumin

doi:10.1016/j.marpolbul.2016.08.057

Cited by 9 publications

(7 citation statements)

References 40 publications

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“…Increasing sea surface temperature (SST) in summer can strengthen oceanic Hg(0) evasion, and Hg(0) can be further oxidized into Hg(II) and PHg with the existence of IO, NO 2 , and HO 2 in the marine boundary layer. , According Huang et al, both δ 202 Hg and Δ 199 Hg show increasing trends during transition from Hg(II) in the seawater to Hg(0) . However, Huang et al’s samples were from the post-desulfurized seawater discharged from a coal-fired power plant, not the seawater from the open sea in the southern hemisphere . No such isotope research has been performed in the Southern Ocean, and this should be investigated in the future.…”

Section: Discussionmentioning

confidence: 99%

“…66,67 According Huang et al, both δ 202 Hg and Δ 199 Hg show increasing trends during transition from Hg(II) in the seawater to Hg(0). 87 However, Huang et al's samples were from the post-desulfurized seawater discharged from a coalfired power plant, not the seawater from the open sea in the southern hemisphere. 87 No such isotope research has been performed in the Southern Ocean, and this should be investigated in the future.…”

Section: Discussionmentioning

confidence: 99%

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Seasonal Variation of Mercury and Its Isotopes in Atmospheric Particles at the Coastal Zhongshan Station, Eastern Antarctica

Chen

Angot

et al. 2020

Environ. Sci. Technol.

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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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Seasonal Variation of Mercury and Its Isotopes in Atmospheric Particles at the Coastal Zhongshan Station, Eastern Antarctica

Chen

Angot

et al. 2020

Environ. Sci. Technol.

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“…At least 10 mL of solution was necessary, similar to previous studies. 27,39 Ten samples (including three standard samples and seven natural samples) were processed to evaluate the precise measurement of low mercury samples. For the mixing solutions, standard mercury solutions (NIST SRM 3133) of 50 ng/mL were prepared.…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

“…In order to obtain precise results, all solutions were prepared with identical mercury concentrations (3.0 ng/mL) and similar acid matrices prior to isotopic determination. At least 10 mL of solution was necessary, similar to previous studies. , Ten samples (including three standard samples and seven natural samples) were processed to evaluate the precise measurement of low mercury samples. For the mixing solutions, standard mercury solutions (NIST SRM 3133) of 50 ng/mL were prepared.…”

Section: Experimental Methodsmentioning

confidence: 99%

Application of an Isotope Binary Mixing Model for Determination of Precise Mercury Isotopic Composition in Samples with Low Mercury Concentration

et al. 2019

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An isotope binary mixing model was applied for high precision measurement of mercury isotope ratios in samples with low mercury concentrations by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). Standard addition was used to evaluate the precision and accuracy of the isotope composition calculations resulting from the isotope binary mixing model. A high, steady 202 Hg signal of approximately 2.13 V was achieved, with the mercury concentration reaching 3 ng/mL. The isotopic composition of three standards (NIST SRM 1646a; NIST SRM 1575a; BCR 482) and natural samples were precisely determined. The standards and natural samples were diluted to low mercury concentrations (low to 0.90 ng/mL) and mixed with standard solutions (NIST SRM 3133) with high mercury concentrations (50 ng/mL); the isotopic compositions of low mercury concentration samples were calculated using an isotope binary mixing model after the isotopic compositions of the mixing solutions were measured. The results showed that the uncertainty of the calculated mercury isotopic compositions was in an acceptable range and the calculation isotope data were in good agreement with direct measurements. Our method allows the precise determination of mercury isotope composition in mercury solutions of concentrations (0.90 ng/mL) below the detection limit of the current system (3.00 ng/mL).

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“…Mercury, the most persistent hazardous pollutant in heavy metals, can migrate and transfer anywhere via flowing rivers and atmospheric circulation [4,5,6], continually accumulate in organisms [7], and even pollute the Earth’s biosphere by cycling in major environmental compartments and across national boundaries on a global scale for a long time [8,9]. It was reported that approximately 50% of mercury in the environment is from anthropogenic sources [10,11].…”

Section: Introductionmentioning

confidence: 99%

Mercury Pollution, Treatment and Solutions in Spent Fluorescent Lamps in Mainland China

Jia

Zhao

et al. 2018

IJERPH

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With the increasing awareness of energy conservation and environmental protection, high energy-consuming incandescent lamps have been largely withdrawn from the stage of mainland China’s lighting industry because the main raw material for electricity production-coal-produces mercury pollution when burned and energy-saving fluorescent lamps have made considerable progress. However, fluorescent lamps emit mercury, which still causes environmental pollution. In this work, the existing problems in the development of fluorescent lamps, and in the collection and treatment of spent fluorescent lamps were analyzed. The contributions of various external factors to the above problems were evaluated based on fuzzy theory. Finally, solutions to control the pollution of mercury from fluorescent lamps and spent fluorescent lamps were proposed. Results show that the biggest problem that causes mercury pollution is the first among three factors: energy conservation and mercury emission from fluorescent lamps and spent fluorescent lamps, spent fluorescent lamp collection and spent fluorescent lamp treatment. The best way to solve these problems is by developing an energy-saving and environment-friendly light emitting diode (LED) industry in mainland China.

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Mercury isotope fractionation during transfer from post-desulfurized seawater to air

Cited by 9 publications

References 40 publications

Seasonal Variation of Mercury and Its Isotopes in Atmospheric Particles at the Coastal Zhongshan Station, Eastern Antarctica

Seasonal Variation of Mercury and Its Isotopes in Atmospheric Particles at the Coastal Zhongshan Station, Eastern Antarctica

Application of an Isotope Binary Mixing Model for Determination of Precise Mercury Isotopic Composition in Samples with Low Mercury Concentration

Mercury Pollution, Treatment and Solutions in Spent Fluorescent Lamps in Mainland China

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