The concentration, speciation and sources of mercury in Chesapeake Bay precipitation

Mason, Robert P.; Lawson, Nicole; Sullivan, Kristin A.

doi:10.1016/s1352-2310(97)00206-9

Cited by 69 publications

(34 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Hg 0 values are consistent with an annual average concentration of 2.0 to 2.6 ng/m 3 reported for Northeast U.S. locations (NESCAUM 1998) The mean Hg p values are consistent with results of a recent study (Reinfelder et al 2004) performed in New Jersey that measured fine aerosol (PM 2.5 ) mercury concentrations at five sites; mean values ranged from 4.9 to 16 pg/m. 3 The Hg p concentrations found in this current study are similar to background concentrations measured in New York state (7 to 12 pg/m 3 ; Olmez et al 1998) and Florida (4.9 to 9.3 pg/m 3 ; Guentzel et al 2001) but are lower than Hg p concentrations measured in the late 1980s through mid-1990s in rural Michigan (11-22 pg/m 3 ; Keeler et al 1995), rural Vermont (11 pg/m 3 ; Burke et al 1995), northern Wisconsin (25 pg/m 3 ; Fitzgerald et al 1994) and adjacent to the Chesapeake Bay (16 to 21 pg/m 3 ; Mason et al 1997). This difference could be due to a decreasing trend in particulate Hg in recent years as controls on certain mercury sources such as waste incineration have been put in place.…”

Section: Mean Valuesmentioning

confidence: 82%

Ambient elemental, reactive gaseous, and particle-bound mercury concentrations in New Jersey, U.S.: measurements and associations with wind direction

Aucott

Caldarelli

Zsolway

et al. 2008

Environ Monit Assess

View full text Add to dashboard Cite

Two and a half years of data of ambient concentrations of elemental mercury (Hg(0)), reactive gaseous mercury (RGM), and particle-bound mercury (Hg(p)) were collected at measurement sites at Elizabeth, New Jersey and New Brunswick, New Jersey with Tekran sampling units. The data were processed, summarized, and analyzed from a variety of perspectives. Data quality control and quality assurance procedures are described. Wind direction and wind speed data for each of the sites were also collected. Significant temporal variations in concentrations of all three species were observed. Some significant directional variations were also seen. The sporadic nature of many of the temporal variations is consistent with and could reflect highly variable emissions patterns from anthropogenic mercury sources. Overall mean concentrations of all species were determined. These were, for Hg(0), Hg(p), and RGM respectively; 2.25 +/- 0.04 nanograms per cubic meter (ng/m(3)), 8.21 +/- 0.39 picograms per cubic meter (pg/m(3)), and 8.93 +/- 0.31 pg/m(3) (arithmetic means and 95% confidence intervals) at Elizabeth, and 2.15 +/- 0.02 ng/m(3), 10.73 +/- 0.45 pg/m(3), and 6.04 +/- 0.30 pg/m(3) at New Brunswick. Mean concentrations were determined for 16 different sectors representing wind directions. The impact of one known large source is suggested by these data. Reasons for some directional variations are not apparent and suggest a need for further investigation.

show abstract

Section: Mean Valuesmentioning

confidence: 82%

Ambient elemental, reactive gaseous, and particle-bound mercury concentrations in New Jersey, U.S.: measurements and associations with wind direction

Aucott

Caldarelli

Zsolway

et al. 2008

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…For example, precipitation amounts may directly lead to changes in wet deposition loads (NADP, 2011) leading to changes in soil Hg densities (although such effects may be highly nonlinear due to "washout" effects (Lamborg et al, 1995;Landis et al, 2002;Lyman and Gustin, 2008;Mason et al, 1997;Faïn et al, 2011). Further, correlations between annual precipitation and soil Hg may be caused by canopy wash-off and throughfall deposition which in forest ecosystems is a significant deposition flux (Demers et al, 2007;Rea et al, 1996;Graydon et al, 2008a), and such deposition loads likely would be efficiently retained in ecosystems (e.g., soils generally retain more than 90 % of Hg deposited with rainfall; Ericksen et al, 2005;Harris et al, 2007;Graydon et al, 2009;Hintelmann et al, 2002).…”

Section: Sensitivity To Precipitation Changesmentioning

confidence: 99%

Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools

2013

View full text Add to dashboard Cite

Substantial amounts of mercury (Hg) in the terrestrial environment reside in soils and are associated with soil organic carbon (C) pools, where they accumulated due to increased atmospheric deposition resulting from anthropogenic activities. The purpose of this study was to examine potential sensitivity of surface soil Hg pools to global change variables, particularly affected by predicted changes in soil C pools, in the contiguous US. To investigate, we included a soil Hg component in the Community Land Model based on empirical statistical relationships between soil Hg / C ratios and precipitation, latitude, and clay; and subsequently explored the sensitivity of soil C and soil Hg densities (i.e., areal-mass) to climate scenarios in which we altered annual precipitation, carbon dioxide (CO₂) concentrations and temperature.

Our model simulations showed that current sequestration of Hg in the contiguous US accounted for 15 230 metric tons of Hg in the top 0–40 cm of soils, or for over 300 000 metric tons when extrapolated globally. In the simulations, US soil Hg pools were most sensitive to changes in precipitation because of strong effects on soil C pools, plus a direct effect of precipitation on soil Hg / C ratios. Soil Hg pools were predicted to increase beyond present-day values following an increase in precipitation amounts and decrease following a reduction in precipitation. We found pronounced regional differences in sensitivity of soil Hg to precipitation, which were particularly high along high-precipitation areas along the West and East Coasts. Modelled increases in CO₂ concentrations to 700 ppm stimulated soil C and Hg accrual, while increased air temperatures had small negative effects on soil C and Hg densities. The combined effects of increased CO₂, increased temperature and increased or decreased precipitation were strongly governed by precipitation and CO₂ showing pronounced regional patterns. Based on these results, we conclude that the combination of precipitation and CO₂ should be emphasised when assessing how climate-induced changes in soil C may affect sequestration of Hg in soils

show abstract

“…This is obviously an underestimation since for properly assessing Hg atmospheric deposition, a longer; at least one year-period of deployment would be necessary. Notwithstanding, taking into consideration this limiting aspects and considering average concentrations per deployment period ( , and present-day deposition estimated for remote sites in northern South America, 18 but are at least one order of magnitude lower than values found close to point sources, [4][5][6]19 where a significant contribution of dry deposition and washed out particles characteristically results in elevated bulk atmospheric deposition rates.…”

Section: Resultsmentioning

confidence: 99%

Mercury Concentrations in Bulk Atmospheric Deposition over the Coast of Rio de Janeiro, Southeast, Brazil

Lacerda¹,

Paraquetti²,

Rezende³

et al. 2002

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Total Hg concentrations were measured in bulk atmospheric deposition from three sampling stations along the Rio de Janeiro State coast, Southeast, Brazil, from October 1998 to December 1999. Samples were collected at Campos dos Goytacazes, an agriculture center at the North coast; Niterói, an industrialized metropolitan area and at Itacuruçá, a tourist town at the South. Concentrations at Campos average 0.51 ng L -1 , ranging from 0.07 to 1.01 ng L -1 , and showed a seasonal trend, probably affected by burning of sugar cane plantations in winter. At Niterói, concentrations were highest, averaging 0.73 ng L -1 and ranging from 0.06 to 2.95 ng L -1. No pattern of temporal variation was observed and concentration peaks are probably related to industrial emissions. At Itacuruçá, Hg concentrations were below the detection limit of the method (0.02 ng L -1 ) in 35% of the samples, with an average of 0.24 ng L -1 and ranging from <0.02 to 1.04 ng L -1 .

show abstract

The concentration, speciation and sources of mercury in Chesapeake Bay precipitation

Cited by 69 publications

References 27 publications

Ambient elemental, reactive gaseous, and particle-bound mercury concentrations in New Jersey, U.S.: measurements and associations with wind direction

Ambient elemental, reactive gaseous, and particle-bound mercury concentrations in New Jersey, U.S.: measurements and associations with wind direction

Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools

Mercury Concentrations in Bulk Atmospheric Deposition over the Coast of Rio de Janeiro, Southeast, Brazil

Contact Info

Product

Resources

About