Isotopic composition of species-specific atmospheric Hg in a coastal environment

Rolison, John M.; Landing, William M.; Luke, Winston T.; Cohen, Mark; Salters, Vincent J. M.

doi:10.1016/j.chemgeo.2012.10.007

Cited by 150 publications

(187 citation statements)

References 55 publications

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“…A similar signature of back trajectory frequency was observed in Hg isotopes observed during the spring 2011 intensive [26]. Trajectory frequency analysis was also conducted for the summer 2010 intensive, but no clear trends arose, possibly due to stagnant conditions and variable light winds during this study.…”

Section: Back Trajectory Frequency Analysismentioning

confidence: 65%

Mercury Speciation at a Coastal Site in the Northern Gulf of Mexico: Results from the Grand Bay Intensive Studies in Summer 2010 and Spring 2011

et al. 2014

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Abstract:During two intensive studies in summer 2010 and spring 2011, measurements of mercury species including gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM), trace chemical species including O 3 , SO 2 , CO, NO, NO Y , and black carbon, and meteorological parameters were made at an Atmospheric Mercury Network (AMNet) site at the Grand Bay National Estuarine Research Reserve (NERR) in Moss Point, Mississippi. Surface measurements indicate that the mean mercury concentrations were 1.42 ± 0.12 ng·m ) were observed on a few days in each study and were usually associated with either elevated O 3 (>50 ppbv), BrO, and solar radiation or elevated SO 2 (>a few ppbv) but lower O 3 (~20-40 ppbv). This behavior suggests two potential sources of GOM: photochemical oxidation of GEM and direct emissions of GOM from nearby local sources. Lack of correlation between GOM and Beryllium-7 ( 7 Be) suggests little influence on surface GOM from downward mixing of GOM from the upper troposphere. These data were analyzed using the HYSPLIT back trajectory model and principal component analysis in order to develop source-receptor relationships for mercury species in this coastal environment. Trajectory frequency analysis shows that high GOM events were generally associated with high frequencies of the trajectories passing through the areas with high mercury emissions, while low GOM levels were largely associated the trajectories passing through relatively clean areas. Principal component analysis also reveals two main factors: direct emission and photochemical processes that were clustered with high GOM and PBM. This study indicates that the receptor site, which is located in a coastal environment of the Gulf of Mexico, experienced impacts from mercury sources that are both local and regional in nature.

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Section: Back Trajectory Frequency Analysismentioning

confidence: 65%

Mercury Speciation at a Coastal Site in the Northern Gulf of Mexico: Results from the Grand Bay Intensive Studies in Summer 2010 and Spring 2011

et al. 2014

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“…To the best of our knowledge, only one study (Rolison et al, 2013) has looked into the Hg isotopic composition of PBM which can form an important component of atmospheric Hg deposition in urban environments. In the present study, Hg isotopic measurements were performed for PM 10 (particulate matter with size ≤10 micron) samples collected from three locations (a traffic junction, a waste incineration site and an industrial estate) for two seasons, winter and monsoon.…”

Section: Domain Editor-in-chiefmentioning

confidence: 99%

“…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%

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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“…202 Hg and D 199 Hg values have been reported in environmentally relevant matrices such as rocks (Smith et al, 2008), mineral deposits (Hintelmann and Lu, 2003;Smith et al, 2005Smith et al, , 2008Stetson et al, 2009;Sonke et al, 2010), coals (Biswas et al, 2008;Lefticariu et al, 2011;Sun et al, 2014;Yin et al, 2014b), soils (Biswas et al, 2008;Zhang et al, 2013;Feng et al, 2013), sediments (Gehrke et al, 2011;Foucher and Hintelmann, 2009;Feng et al, 2010;Liu et al, 2011;Bartov et al, 2013;Donovan et al, 2013;Ma et al, 2013;Yin et al, 2013aYin et al, , 2015, water (Štrok et al, 2014), air (Demers et al, 2013;Rolison et al, 2013), precipitation (Gratz et al, 2010;Chen et al, 2012;Demers et al, 2013;Sherman et al, 2011Sherman et al, , 2015 and biological samples Blum et al, 2013;Demers et al, 2013;Yin et al, 2013b). With well-defined source signatures, researchers may estimate the relative contribution of sources of Hg through the utilization of binary and/or triple mixing models (Foucher and Hintelmann, 2009;Feng et al, 2010;Liu et al, 2011;Bartov et al, 2013;Donovan et al, 2013;Ma et al, 2013;…”

mentioning

confidence: 99%

Sedimentary records of mercury stable isotopes in Lake Michigan

Yin

Lepak

Krabbenhoft

et al. 2016

Elementa: Science of the Anthropocene

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Mercury (Hg) concentrations and Hg isotopic composition were investigated in three sediment cores in Lake Michigan (LM). Two cores were collected from Green Bay, a region heavily impacted by Hg contamination and one core from an offshore region of LM absent of direct point source Hg. Historical trends of Hg influxes suggest increased Hg deposition began in the 1890s in Green Bay and in the early 1800's in offshore LM. Recently deposited sediment reflecting more anthropogenic influence shows similar d202 Hg values (-1.0 to -0.5‰) for all three cores however, deep core sediments, reflecting pre-industrial eras, show much lower d 202Hg values (-1.7 to -1.2‰). Using a binary mixing model based on d 202Hg signatures, the proportion of anthropogenic Hg was estimated. Model output confirms that Green Bay is more contaminated by local point source than the offshore LM. An increase in positive D199 Hg values (-0.02 to +0.27‰) was observed from inner Green Bay to the offshore of LM, which may indicate increased input of atmospheric Hg and decreased watershed inputs along this transect. Overall, this study suggests that sedimentary Hg isotopes maybe a useful tracer in understanding Hg sources and history of Hg contamination in large lakes.

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Isotopic composition of species-specific atmospheric Hg in a coastal environment

Cited by 150 publications

References 55 publications

Mercury Speciation at a Coastal Site in the Northern Gulf of Mexico: Results from the Grand Bay Intensive Studies in Summer 2010 and Spring 2011

Mercury Speciation at a Coastal Site in the Northern Gulf of Mexico: Results from the Grand Bay Intensive Studies in Summer 2010 and Spring 2011

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

Sedimentary records of mercury stable isotopes in Lake Michigan

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