Effect of penguin and seal excrement on mercury distribution in sediments from the Ross Sea region, East Antarctica

Nie, Yaguang; Liu, Xiaodong; Sun, Liguang; Emslie, Steven D.

doi:10.1016/j.scitotenv.2012.06.022

Cited by 65 publications

(52 citation statements)

References 71 publications

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“…The lithologic characteristics of the three sediment profiles are shown in Fig. 3, and more detailed information has been reported previously by Nie et al (2012) and Liu et al (2013).…”

Section: Study Area and Sample Collectionmentioning

confidence: 72%

Using visible reflectance spectroscopy to reconstruct historical changes in chlorophyllaconcentration in East Antarctic ponds

Chen¹,

Liu

Nie³

et al. 2013

Polar Research

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“…The lithologic characteristics of the three sediment profiles are shown in Fig. 3, and more detailed information has been reported previously by Nie et al (2012) and Liu et al (2013).…”

Section: Study Area and Sample Collectionmentioning

confidence: 72%

Using visible reflectance spectroscopy to reconstruct historical changes in chlorophyllaconcentration in East Antarctic ponds

Chen¹,

Liu

Nie³

et al. 2013

Polar Research

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“…Several studies highlighted that the presence of these large colonies at DDU in summer significantly disturbs the atmospheric cycle of several species including ammonium and oxalate (Legrand et al, 1998), carboxylic acids and other oxygenated volatile organic compounds , and HCHO . In a study investigating sediment profiles excavated from ponds and catchments near penguin colonies in the Ross Sea region, Nie et al (2012) measured high mercury content in penguin excreta (guano). Similarly, elevated total mercury concentrations were measured in ornithogenic soils (i.e., formed by accumulation of guano) of the Fildes and Ardley peninsulas of King George Island (De Andrade et al, 2012).…”

Section: (A) Role Of Penguin Emissionsmentioning

confidence: 99%

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

et al. 2016

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Abstract. Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont d'Urville (DDU, 66 • 40 S, 140 • 01 E, 43 m above sea level) on the East Antarctic coast. Additionally, surface snow samples were collected in February 2009 during a traverse between Concordia Station located on the East Antarctic plateau and DDU. The record of atmospheric Hg(0) at DDU reveals particularities that are not seen at other coastal sites: a gradual decrease of concentrations over the course of winter, and a daily maximum concentration around midday in summer. Additionally, total mercury concentrations in surface snow samples were particularly elevated near DDU (up to 194.4 ng L −1 ) as compared to measurements at other coastal Antarctic sites. These differences can be explained by the more frequent arrival of inland air masses at DDU than at other coastal sites. This confirms the influence of processes observed on the Antarctic plateau on the cycle of atmospheric mercury at a continental scale, especially in areas subject to recurrent katabatic winds. DDU is also influenced by oceanic air masses and our data suggest that the ocean plays a dual role on Hg (0) concentrations. The open ocean may represent a source of atmospheric Hg(0) in summer whereas the sea-ice surface may provide reactive halogens in spring that can oxidize Hg(0). This paper also discusses implications for coastal Antarctic ecosystems and for the cycle of atmospheric mercury in high southern latitudes.

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“…The areas studied ranged from some serious locally affected areas to the global scale (Ci et al 2012;Nie et al 2012;Bełdowski et al 2014;Anthony et al 2014). Mercury in the atmosphere is derived from both natural and anthropogenic sources.…”

Section: Introductionmentioning

confidence: 99%

Effect on the Photo-production of Dissolved Gaseous Mercury in Post-desulfurized Seawater Discharged from a Coal-Fired Power Plant

Sun

Yuan

et al. 2015

Water Air Soil Pollut

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A high concentration of dissolved gaseous mercury (DGM) was detected in post-desulfurized waste seawater, which was discharged from a coal-fired power plant equipped with a seawater desulfurization system and which was located in a coastal area. A large amount of DGM was converted from other forms of mercury during transformation processes, such as photo-reduction. The present study targeted the photo-reduction of mercury and the effects of various environmental parameters on DGM production in the post-desulfurized seawater discharged. The results suggested that the photoreduction of mercury was significantly induced under UV radiation, especially with UVB. The particulate mercury on suspended solids was easily photo-reduced and considered as an important source of DGM. It was confirmed that the suspended solids in postdesulfurized seawater could enhance the reduction process of mercury under UV radiation. The pseudo-firstorder rate constants of DGM production, which were determined through the concentration gradient and trial methods, were 1.39×10 −3 min −1 and 1.45×10 −3 min −1 , respectively. The values showed no significant difference and were both much higher than the reported results, indicating that the photo-reduction of mercury in post-desulfurized seawater deserved more attention. In addition, the initial mercury level was observed when mixing the post-desulfurized seawater with fresh seawater, and this suggested that a significant amount of initial mercury would be produced when the post-desulfurized seawater was discharged into the adjacent sea area and thus becomes another considerable source of DGM.

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Effect of penguin and seal excrement on mercury distribution in sediments from the Ross Sea region, East Antarctica

Cited by 65 publications

References 71 publications

Using visible reflectance spectroscopy to reconstruct historical changes in chlorophyllaconcentration in East Antarctic ponds

Using visible reflectance spectroscopy to reconstruct historical changes in chlorophyllaconcentration in East Antarctic ponds

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

Effect on the Photo-production of Dissolved Gaseous Mercury in Post-desulfurized Seawater Discharged from a Coal-Fired Power Plant

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