Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China

Wang, Zhuhong; Chen, Jiubin; Feng, Xinbin; Hintelmann, Holger; Yuan, Shiwen; Cai, Hongming; Huang, Qiang; Wang, Shuxiao; Wang, Yafei

doi:10.1016/j.crte.2015.02.006

Cited by 85 publications

(84 citation statements)

References 47 publications

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“…Hg in these limestone samples varies from −2.47‰ to −0.37‰, with an average value of −1.64±0.61‰ (1SD, n=11) that is very similar to the one limestone sample (d 202 Hg=−1.43±0.10‰, 2SD) reported by Wang et al (2015). Limestone is significantly depleted in heavier Hg isotopes compare to other crustal rocks (Figure 1).…”

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confidence: 48%

“…Further experimental and observational work on Hg isotope MDF during coal combustion, metal refining and liquid Hg 0 use is needed to confirm the presented conceptual models. High-precision Hg isotope measurement of total gaseous Hg (TGM, GEM+GOM) and precipitation Hg has been reported for several N-American and European regions (Chen et al, 2012;Demers et al, 2013Demers et al, , 2015Donovan et al, 2013;Fu et al, 2014;Gratz et al, 2010;Sherman et al, 2010Sherman et al, , 2012Sherman et al, , 2015Wang et al, 2015). Global TGM is enriched in the heavy isotopes (d 202 Hg=0.51 ± 0.41 ‰, 1SD) (Demers et al, 2013(Demers et al, , 2015Fu et al, 2014;Gratz et al, 2010;Sherman et al, 2010) compared to our model estimated GEM emissions (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…We therefore assume Hg emissions have the same Hg isotope composition as limestone in Figure 1. This assumption was also validated in a typical cement plant, Sichuan Province, China where the emitted THg was calculated to have nearly the same Hg isotope composition as raw materials (Wang et al, 2015).…”

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confidence: 98%

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Historical (1850–2010) mercury stable isotope inventory from anthropogenic sources to the atmosphere

Sun

Streets

Horowitz

et al. 2016

Elementa: Science of the Anthropocene

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162

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Mercury (Hg) stable isotopes provide a new tool to trace the biogeochemical cycle of Hg. An inventory of the isotopic composition of historical anthropogenic Hg emissions is important to understand sources and post-emission transformations of Hg. We build on existing global inventories of anthropogenic Hg emissions to the atmosphere to develop the first corresponding historical Hg isotope inventories for total Hg (THg) and three Hg species: gaseous elemental Hg (GEM), gaseous oxidized Hg (GOM) and particulate-bound Hg (PBM). We compile d

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confidence: 48%

Section: Discussionmentioning

confidence: 99%

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Historical (1850–2010) mercury stable isotope inventory from anthropogenic sources to the atmosphere

Sun

Streets

Horowitz

et al. 2016

Elementa: Science of the Anthropocene

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162

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“…The discovery of mass dependent fractionation (MDF) and mass independent fractionation (MIF) of mercury isotopes Hg Schauble, 2007;Biswas et al, 2008;Ghosh et al, 2008;Carignan et al, 2009;Das et al, 2009Das et al, , 2013Laffont et al, 2009;Sherman et al, 2009Sherman et al, , 2010Sherman et al, , 2012Sonke, 2011;Chen et al, 2012;Jackson andMuir, 2012, Perrot et al, 2012;Sonke and Blum, 2013). MIF of an isotope of even mass number ( 200 Hg) has also been detected in atmospheric Hg (Gratz et al, 2010;Chen et al, 2012;Sherman et al, 2012, Rolison et al, 2013, Wang et al, 2015 and has been suggested to be caused by photo-induced oxidation of GEM on the surfaces of aerosols and particles in the tropopause (Chen et al, 2012).…”

Section: Domain Editor-in-chiefmentioning

confidence: 99%

“…al., 2013), GOM (Rolison et al, 2013), PBM (Rolison et al, 2013), precipitation (Chen et al, 2012;Demers et. al., 2013;Gratz et al, 2010;Sherman et al, 2012;Wang et al, 2015) and snow . Direct measurements of atmospheric GEM showed negative MIF (D 199 Hg from −0.41 to 0.06‰), consistent with the prediction that atmospheric Hg contains complimentary MIF signatures of aquatic reservoirs .…”

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confidence: 99%

Mercury isotopes of atmospheric particle bound mercury for source apportionment study in urban Kolkata, India

Das

Wang

Khezri

et al. 2016

Elementa: Science of the Anthropocene

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The particle bound mercury (PBM) in urban-industrial areas is mainly of anthropogenic origin, and is derived from two principal sources: Hg bound to particulate matter directly emitted by industries and power generation plants, and adsorption of gaseous elemental mercury (GEM) and gaseous oxidized mercury (GOM) on air particulates from gas or aqueous phases. Here, we measured the Hg isotope composition of PBM in PM 10 samples collected from three locations, a traffic junction, a waste incineration site and an industrial site in Kolkata, the largest metropolis in Eastern India. Sampling was carried out in winter and monsoon seasons between 2013-2015. The objective was to understand whether the isotope composition of the PBM represents source composition. The PBM collected from the waste burning site showed little mass independent fractionation (MIF) (D 199 Hg = + 0.12 to -0.11‰), similar to the signature in liquid Hg and Hg ores around the world with no seasonal variations. Samples from the industrial site showed mostly negative MDF and MIF (δ 202 Hg = -1.34 to -3.48 ‰ and D 199 Hg = + 0.01 to -0.31‰). The MDF is consistent with PBM generated by coal combustion however, the MIF is 0.15‰ more negative compared to the Hg isotope ratios in Indian coals. The traffic junction PBM is probably not produced in situ, but has travelled some distances from nearby industrial sources. The longer residence time of this PBM in the atmosphere has resulted in-aerosol aqueous photoreduction. Thus, the MIF displays a larger range (D 199 Hg = + 0.33 to -0.30‰) compared to the signature from the other sites and with more positive values in the humid monsoon season. Different Hg isotopic signature of PBM in the three different sampling locations within the same city indicates that both source and post emission atmospheric transformations play important roles in determining isotopic signature of PBM.

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Coupling atmospheric mercury isotope ratios and meteorology to identify sources of mercury impacting a coastal urban‐industrial region near Pensacola, Florida, USA

Demers

Sherman

Blum

et al. 2015

Global Biogeochemical Cycles

157

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Identifying the anthropogenic and natural sources of mercury (Hg) emissions contributing to atmospheric mercury on local, regional, and global scales continues to be a grand challenge. The relative importance of various direct anthropogenic emissions of mercury, in addition to natural geologic sources and reemission of previously released and deposited mercury, differs regionally and temporally. In this study, we used local‐scale, mesoscale, and synoptic‐scale meteorological analysis to couple the isotopic composition of ambient atmospheric mercury with potential sources of mercury contributing to a coastal urban‐industrial setting near a coal‐fired power plant in Pensacola, Florida, USA. We were able to broadly discern four influences on the isotopic composition of ambient atmospheric mercury impacting this coastal urban‐industrial region: (1) local to regional urban‐industrial anthropogenic emissions (mean δ202Hg = 0.44 ± 0.05‰, 1SD, n = 3), (2) marine‐influenced sources derived from the Gulf of Mexico (mean δ202Hg = 0.77 ± 0.15‰, 1SD, n = 4), (3) continental sources associated with north‐northwesterly flows from within the planetary boundary layer (mean δ202Hg = 0.65 ± 0.04‰, 1SD, n = 3), and (4) continental sources associated with north‐northeasterly flows at higher altitudes (i.e., 2000 m above ground level; mean δ202Hg = 1.10 ± 0.21‰, 1SD, n = 8). Overall, these data, in conjunction with previous studies, suggest that the background global atmospheric mercury pool is characterized by moderately positive δ202Hg values; that urban‐industrial emissions drive the isotopic composition of ambient atmospheric mercury toward lower δ202Hg values; and that air‐surface exchange dynamics across vegetation and soils of terrestrial ecosystems drive the isotopic composition of ambient atmospheric mercury toward higher positive δ202Hg values. The data further suggest that mass‐independent fractionation (MIF) of both even‐mass‐ and odd‐mass‐number isotopes, likely generated by photochemical reactions in the atmosphere or during reemission from terrestrial and aquatic ecosystems, can be obscured by mixing with anthropogenic emissions having different MIF signatures.

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Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China

Cited by 85 publications

References 47 publications

Historical (1850–2010) mercury stable isotope inventory from anthropogenic sources to the atmosphere

Historical (1850–2010) mercury stable isotope inventory from anthropogenic sources to the atmosphere

Mercury isotopes of atmospheric particle bound mercury for source apportionment study in urban Kolkata, India

Coupling atmospheric mercury isotope ratios and meteorology to identify sources of mercury impacting a coastal urban‐industrial region near Pensacola, Florida, USA

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