Effect of organic matter and pH on mercury release from soils

Yang, Yongkui; Zhang, Cheng; Shi, Xiaojun; Lin, Tao; Wang, Dingyong

doi:10.1016/s1001-0742(07)60220-4

Cited by 85 publications

(35 citation statements)

References 34 publications

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“…This has generally been observed by others (Yang et al, 2007;Xin and Gustin, 2007). Soil pH impacts the mobility of mercury in the soil compartment.…”

Section: Environmental Correlatessupporting

confidence: 72%

“…Soil organic matter has been suggested to influence the GEM flux from background soils (Moore and Castro, 2012;Yang et al, 2007;Grigal, 2003). While data from this study are not sufficient to fully explore this correlate, SOM does not appear to correlate with the mercuriferous site fluxes as would be expected (Mauclair et al, 2008).…”

Section: Environmental Correlatesmentioning

confidence: 54%

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Air-surface exchange measurements of gaseous elemental mercury over naturally enriched and background terrestrial landscapes in Australia

Edwards

Howard²

2013

Atmos. Chem. Phys.

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This paper presents the first gaseous elemental mercury (GEM) air-surface exchange measurements obtained over naturally enriched and background (<0.1 μg g⁻¹ Hg) terrestrial landscapes in Australia. Two pilot field studies were carried out during the Australian autumn and winter periods at a copper-gold-cobalt-arsenic-mercury mineral field near Pulganbar, NSW. GEM fluxes using a dynamic flux chamber approach were measured, along with controlling environmental parameters over three naturally enriched and three background substrates. The enriched sites results showed net emission to the atmosphere and a strong correlation between flux and substrate Hg concentration, with average fluxes ranging from 14 ± 1 ng m⁻² h⁻¹ to 113 ± 6 ng m⁻² h⁻¹. Measurements at background sites showed both emission and deposition. The average Hg flux from all background sites showed an overall net emission of 0.36 ± 0.06 ng m⁻² h⁻¹. Fluxes show strong relationships with temperature, radiation, and substrate parameters. A compensation point of 2.48, representative of bare soils was determined. For periods of deposition, dry deposition velocities ranged from 0.00025 cm s⁻¹ to 0.0083 cm s⁻¹ with an average of 0.0041 ± 0.00018 cm s⁻¹, representing bare soil, nighttime conditions. Comparison of the Australian data to North American data suggests the need for Australian-specific mercury air-surface exchange data representative of Australia's unique climatic conditions, vegetation types, land use patterns and soils

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“…This has generally been observed by others (Yang et al, 2007;Xin and Gustin, 2007). Soil pH impacts the mobility of mercury in the soil compartment.…”

Section: Environmental Correlatessupporting

confidence: 72%

Section: Environmental Correlatesmentioning

confidence: 54%

Air-surface exchange measurements of gaseous elemental mercury over naturally enriched and background terrestrial landscapes in Australia

Edwards

Howard²

2013

Atmos. Chem. Phys.

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“…(Choi and Holsen, 2009b;Yang et al, 2007) and meteorological parameters (e.g. UV radiation, air temperature, rainfall) (Gabriela et al, 2011;Almeida et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Investigation of factors affecting mercury emission from subtropical forest soil: A field controlled study in southwestern China

Zhou

Wang

Zhang

et al. 2017

Journal of Geochemical Exploration

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Recent studies demonstrated that subtropical forest in China was considered as a large pool of atmospheric mercury and soils of forested watershed is a large reservoir of atmospherically deposited mercury. However, forest ecosystems not only act as sinks but also as sources of previously deposited mercury emitted back to the atmosphere. In this study a field controlled method was performed in Tieshanping National Forest Park (TNFP) to identify the effects of the most important parameters that controlled mercury emissions from soil surfaces, including chamber flushing flow turnover times (TOTs), soil water content and watering, total gaseous mercury (TGM) in air and understory. Flushing flow rates significantly affected the calculation of mercury flux and the optimal TOTs were 0.94 min in the forest. TGM in atmosphere was significantly inhibited mercury emission from soils, and the deposited mercury was not absorbed firmly by the soils in a short time and emitted back to atmosphere rapidly when TGM concentration decreased. Higher soil moisture reduced the emission of mercury and initial watering produces a spike in the mercury emissions due to the interstitial soil gas mercury displaced by infiltrating water physically. However, subsequent watering was reducing the fluxes, because surface soil was saturated and soil pores were blocked by water film and inhibited the soil mercury emission. Soils under the understory had a higher mercury concentrations and deep organic layers. However, the fluxes of soil under the understory significantly were inhibited in daytime because solar radiation was blocked by the understory and the higher litter layer.

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“…Previous studies showed that Hg emissions from soil surfaces are affected by various environmental parameters including solar radiation, temperature and soil wetness especially in controlled environments (Corbett-Hains et al, 2012;Fu et al, 2012;Kocman and Horvat, 2010;Choi and Holsen, 2009a;Yang et al, 2007;Xin et al, 2007); however, there are also many studies which did not observe any clear relationship between Hg exchange flux and those parameters or did find even opposite trends. Generally, it has been shown that Hg emission from soil surfaces are positively correlated with solar radiation and temperature, but in a few studies Hg emissions were significantly enhanced during the nighttime or on cloudy days (Zhang et al, 2008;Engle et al, 2005).…”

Section: Introductionmentioning

confidence: 98%

Mercury Exchange Flux from Two Different Soil Types and Affecting Parameters

Park¹,

Kim²,

Han³

2013

ajae

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Mercury exchange fluxes between atmosphere and soil surface were measured in two different types of soils; lawn soil (LS) and forest soil (FS). Average Hg emission from LS was higher than from FS although the soil Hg content was more than 2 times higher in forest soil. In LS, Hg emissions were much greater in warm season than in cold season; however, deposition was dominant in FS during warm season because of leafy trees blocking the solar radiation reaching on the soil surface. In both LS and FS, Hg fluxes showed significantly positive correlations with UV radiation and soil surface temperature during cold season. In addition, it was observed that emission showed positive correlation with UV radiation and soil temperature while there was negative relationship between deposition and UV radiation.

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Effect of organic matter and pH on mercury release from soils

Cited by 85 publications

References 34 publications

Air-surface exchange measurements of gaseous elemental mercury over naturally enriched and background terrestrial landscapes in Australia

Air-surface exchange measurements of gaseous elemental mercury over naturally enriched and background terrestrial landscapes in Australia

Investigation of factors affecting mercury emission from subtropical forest soil: A field controlled study in southwestern China

Mercury Exchange Flux from Two Different Soil Types and Affecting Parameters

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