An Investigation of the Kinetic Processes Influencing Mercury Emissions from Sand and Soil Samples of Varying Thickness

Quiñones, Jason Luis; Carpi, Anthony

doi:10.2134/jeq2010.0327

Cited by 7 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results 269 differ from Quinones and Carpi (2011) 16 which focused on much shallower soil depths 270 and higher light conditions and concluded the light may continue to drive emissions to a 271 depth of 0.4 cm below the surface. …”

mentioning

confidence: 69%

Susceptibility of Soil Bound Mercury to Gaseous Emission As a Function of Source Depth: An Enriched Isotope Tracer Investigation

Mazur

Eckley

Mitchell

2015

Environ. Sci. Technol.

View full text Add to dashboard Cite

Always cite the published version, so the author(s) will receive recognition through services that track citation counts, e.g. Scopus. If you need to cite the page number of the TSpace version (original manuscript or accepted manuscript) because you cannot access the published version, then cite the TSpace version in addition to the published version using the permanent URI (handle) found on the record page.

show abstract

mentioning

confidence: 69%

Susceptibility of Soil Bound Mercury to Gaseous Emission As a Function of Source Depth: An Enriched Isotope Tracer Investigation

Mazur

Eckley

Mitchell

2015

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Temperature is certainly a dominant one as has been demonstrated in existing soil-air fluxes studies of mercury (Wang et al, 2014b;Zhu et al, 2016;Poissant and Casimir, 1998). The formation pathways of Hg 0 in soil are all related to temperature, an empirical rule suggests that a 10℃ temperature increase doubles the rates for chemical reaction near room temperature, which has been proven to be applicable to Hg Ⅱ reduction in boreal soil (Moore and Carpi, 2005;Quinones and Anthony, 2011;Wang et al, 2016;Pannu et al, 2014). Discussions in Section 3.1.2 also suggested temperature as a potentially useful tracer for predicting natural surface emissions of GEM.…”

Section: Development Of the Approachmentioning

confidence: 92%

Assessing contributions of natural surface and anthropogenic emissions to atmospheric mercury in a fast developing region of Eastern China from 2015 to 2018

Qin¹,

Zhang²,

Wang³

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. Mercury (Hg) is a global toxic pollutant that can be released into the atmosphere through anthropogenic and natural sources. The uncertainties in the estimated emission amounts are much larger from natural than anthropogenic sources. A method was developed in the present study to quantify the contributions of natural surface mercury emissions to ambient gaseous elemental mercury (GEM) concentrations through application of positive matrix factorization (PMF) analysis with temperature, O3, and NH3 as indicators of GEM emissions from natural surfaces. GEM concentrations were continuously monitored at a 2-hourly resolution at a regional background site in the Yangtze River Delta in Eastern China during 2015–2018. Annual average GEM concentrations were in the range of 2.03–3.01 ng/m3, with a strong decreasing trend at a rate of −0.32 ± 0.07 ng m−3 yr−1 from 2015 to 2018, which was mostly caused by reduced anthropogenic emissions since 2013. The estimated contributions from natural surface emissions of mercury to the ambient GEM concentrations were in the range of 0.90–1.01 ng/m3 on annual average with insignificant interannual changes, but the relative contribution increased significantly from 36 % in 2015 to 53 % in 2018, gradually surpassing those from anthropogenic sources.

show abstract

“…The pseudo-first reduction rate constant of Hg II has been assumed to be in the range of 10 −11 to 10 −10 s −1 (Scholtz et al, 2003;Qureshi et al, 2011a). Under laboratory conditions at 100 W m −2 and 32 ± 7 • C, the pseudo-first reduction rate was estimated to be 2-8 × 10 −10 m 2 s −1 w −1 basing on 2 mm soil depth (the maximum depth for light penetration in soil) (Quinones and Carpi, 2011). Si and Ariya (2015) reported a photoreduction rate of Hg II in the presence of alkanethiols to be 3-9 × 10 −9 m 2 s −1 w −1 .…”

Section: Modeling Of Air-surface Hg 0 Exchange Fluxmentioning

confidence: 99%

Global observations and modeling of atmosphere–surface exchange of elemental mercury: a critical review

et al. 2016

View full text Add to dashboard Cite

Abstract. Reliable quantification of air-surface fluxes of elemental Hg vapor (Hg 0 ) is crucial for understanding mercury (Hg) global biogeochemical cycles. There have been extensive measurements and modeling efforts devoted to estimating the exchange fluxes between the atmosphere and various surfaces (e.g., soil, canopies, water, snow, etc.) in the past three decades. However, large uncertainties remain due to the complexity of Hg 0 bidirectional exchange, limitations of flux quantification techniques and challenges in model parameterization. In this study, we provide a critical review on the state of science in the atmosphere-surface exchange of Hg 0 . Specifically, the advancement of flux quantification techniques, mechanisms in driving the air-surface Hg exchange and modeling efforts are presented. Due to the semi-volatile nature of Hg 0 and redox transformation of Hg in environmental media, Hg deposition and evasion are influenced by multiple environmental variables including seasonality, vegetative coverage and its life cycle, temperature, light, moisture, atmospheric turbulence and the presence of reactants (e.g., O 3 , radicals, etc.). However, the effects of these processes on flux have not been fundamentally and quantitatively determined, which limits the accuracy of flux modeling.We compile an up-to-date global observational flux database and discuss the implication of flux data on the global Hg budget. Mean Hg 0 fluxes obtained by micrometeorological measurements do not appear to be significantly greater than the fluxes measured by dynamic flux chamber methods over unpolluted surfaces (p = 0.16, one-tailed, Mann-Whitney U test). The spatiotemporal coverage of existing Hg 0 flux measurements is highly heterogeneous with large data gaps existing in multiple continents (Africa, South Asia, Middle East, South America and Australia). The magnitude of the evasion flux is strongly enhanced by human activities, particularly at contaminated sites. Hg 0 flux observations in East Asia are comparatively larger in magnitude than the rest of the world, suggesting substantial re-emission of previously deposited mercury from anthropogenic sources. The Hg 0 exchange over pristine surfaces (e.g., background soil and water) and vegetation needs better constraints for global analyses of the atmospheric Hg budget. The existing knowledge gap and the associated research needs for future measurements and modeling efforts for the air-surface exchange of Hg 0 are discussed.

show abstract

An Investigation of the Kinetic Processes Influencing Mercury Emissions from Sand and Soil Samples of Varying Thickness

Cited by 7 publications

References 25 publications

Susceptibility of Soil Bound Mercury to Gaseous Emission As a Function of Source Depth: An Enriched Isotope Tracer Investigation

Susceptibility of Soil Bound Mercury to Gaseous Emission As a Function of Source Depth: An Enriched Isotope Tracer Investigation

Assessing contributions of natural surface and anthropogenic emissions to atmospheric mercury in a fast developing region of Eastern China from 2015 to 2018

Global observations and modeling of atmosphere–surface exchange of elemental mercury: a critical review

Contact Info

Product

Resources

About