Mercury in Indiana watersheds: Retrospective for 2001–2006

Risch, Martin R.; Baker, Nancy T.; Fowler, Kathleen K.; Egler, Amanda L.; Lampe, David C.

doi:10.3133/pp1780

Cited by 3 publications

(5 citation statements)

References 12 publications

(13 reference statements)

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“…Lakes and rivers in California in 1988/1989 exhibited MeHg concentrations between 0.04 -97 ng.L -1 and 0.17 -3.0 ng.L -1 , respectively (Gill and Bruland, 1990). In the average MeHg concentration was 0.013 ng.L -1 in Lake Michigan (Mason and Sullivan, 1997) and later in 2010 was up to 0.66 ng.L -1 on Indiana watersheds (Risch et al, 2010), which are -again -in the same range of concentrations found in this national survey.…”

Section: Accepted Manuscriptsupporting

confidence: 80%

Assessment of background concentrations of organometallic compounds (methylmercury, ethyllead and butyl- and phenyltin) in French aquatic environments

et al. 2016

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The aim of this work is to estimate background concentrations of organometallic compounds, such as tributyltin (TBT), dibutyltin (DBT), monobutyltin (MBT), triphenyltin (TPhT), diphenyltin (DPhT), monophenyltin (MPhT), methylmercury (MeHg), inorganic mercury (iHg) and diethyllead (Et2Pb) in the aquatic environment at the French national scale. Both water and sediment samples were collected all over the country, resulting in 152 water samples and 123 sediment samples collected at 181 sampling points. Three types of surface water bodies were investigated: rivers (140 sites), lakes (19 sites) and coastal water (42 sites), spread along the 11 French river basins. The choice of sites was made on the basis of previous investigation results and the following target criteria: reference, urban sites, agricultural and industrial areas. The analytical method was properly validated for both matrices prior to analysis, resulting in low limits of quantification (LOQ), good precision and linearity in agreement with the Water Framework Directive demands. The results were first evaluated as a function of their river basins, type of surrounding pressure and water bodies. Later, background concentrations at the French national scale were established for both water and sediment matrices, as well as their threshold, i.e., the concentration that distinguishes background from anomalies or contaminations. Background concentrations in water are ranging between <0.04-0.14 ng Hg. L(-1) for MeHg, <0.14-2.10 ng Hg. L(-1) for iHg, <1.0-8.43 ng Pb. L(-1) for Et2Pb and 0.49-151 ng Sn. L(-1), <0.08-3.04 ng Sn. L(-1) and <0.08-0.25 ng Sn. L(-1) for MBT, DBT and TBT, respectively. For sediments, background concentrations were set as <0.09-1.11 ng Hg. g(-1) for MeHg, <0.06-24.3 ng Pb. g(-1) for Et2Pb and <1.4-13.4 ng Sn. g(-1), <0.82-8.54 ng Sn. g(-1), <0.25-1.16 ng Sn. g(-1) and <0.08-0.61 ng Sn. g(-1) for MBT, DBT, TBT and DPhT, respectively. TBT occurs in higher concentrations than the available environmental protection values in 24 and 38 sampling sites for both water and sediment samples, respectively. Other phenyltins (MPhT and TPhT) did not occur above their LOQ and therefore no background was possible to establish. Throughout this work, which is the first assessment of background concentrations for organometallic compounds at the French national level ever being published, it was possible to conclude that over the last 10-20 years organotin concentrations in French river basins have decreased while MeHg concentration remained stable.

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Section: Accepted Manuscriptsupporting

confidence: 80%

Assessment of background concentrations of organometallic compounds (methylmercury, ethyllead and butyl- and phenyltin) in French aquatic environments

et al. 2016

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“…Plumes from local emissions sources delivered wet and dry Hg deposition to soils downwind, while particulate Hg in stream water from upstream watersheds delivered Hg to bed sediments in the same area (Hatcher and Filippelli, 2010). Risch et al (2010) found that unfiltered water Hg concentrations in streams were related most to levels of particulates in the water. These findings…”

Section: Hg In Urban Soils and Streambed Sedimentsmentioning

confidence: 94%

“…Mercury in urban soils can have concentrations substantially higher than ambient background concentrations in soils outside cities (Crewe, 2012). Man-made surfaces such as buildings and pavement in cities enhance the dry deposition of atmospheric Hg that can enter storm runoff and cities that have large numbers of outfalls for wastewater effluent can have high levels of stream Hg (Risch et al, 2010). Streams draining predominantly urban land cover have higher streambed Hg concentrations (Wentz et al, 2014, Hatcher and.…”

Section: Figurementioning

confidence: 99%

“…Lakebed sediments in locations draining urban land cover have higher Hg concentrations than rural areas (Van Metre, 2012;Engstrom et al, 2007). Streams draining predominantly urban land cover have higher concentrations, loads, and yields of stream Hg than non-urban streams (Brightbill et al, 2004;Lyons et al, 2006;Risch et al, 2010). Where environmental conditions promote the conversion of the large urban Hg loads to methylmercury, food web accumulation will occur.…”

Section: Figurementioning

confidence: 99%

“…Most watersheds in the state had watershed Hg yields that were less than the wet deposition loading (Risch et al, 2010). When statewide fish Hg concentration distributions were assessed, these same watersheds in the Indianapolis area had among the highest percentages (up to 40%) of fish Hg concentrations that exceeded the U.S. Environmental Protection Agency criterion for Hg of 300 ppb (U.S. Environmental Protection Agency, 2001).…”

Section: Mercury In Urban Streams and Fishmentioning

confidence: 99%

See 2 more Smart Citations

Geochemical legacies and the future health of cities: A tale of two neurotoxins in urban soils

Filippelli

Risch

Laidlaw

et al. 2015

Elementa: Science of the Anthropocene

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Spatial Patterns and Temporal Changes in Atmospheric-Mercury Deposition for the Midwestern USA, 2001–2016

Risch

Kenski²

2018

Atmosphere

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Spatial patterns and temporal changes in atmospheric-mercury (Hg) deposition were examined in a five-state study area in the Midwestern USA where 32% of the stationary sources of anthropogenic Hg emissions in the continental USA were located. An extensive monitoring record for wet and dry Hg deposition was compiled for 2001-2016, including 4666 weekly precipitation samples at 13 sites and 27 annual litterfall-Hg samples at 7 sites. This study is the first to examine these Hg data for the Midwestern USA. The median annual precipitation-Hg deposition at the study sites was 10.4 micrograms per square meter per year (µg/m 2 /year) and ranged from 5.8 µg/m 2 /year to 15.0 µg/m 2 /year. The median annual Hg concentration was 9.4 ng/L. Annual litterfall-Hg deposition had a median of 16.1 µg/m 2 /year and ranged from 9.7 to 23.4 µg/m 2 /year. Isopleth maps of annual precipitation-Hg deposition indicated a recurring spatial pattern similar to one revealed by statistical analysis of weekly precipitation-Hg deposition. In that pattern, high Hg deposition in southeastern Indiana was present each year, frequently extending to southern Illinois. Most of central Indiana and central Illinois had similar Hg deposition. Areas with comparatively lower annual Hg deposition were observed in Michigan and Ohio for many years and frequently included part of northern Indiana. The area in southern Indiana where high Hg deposition predominated had the highest number of extreme episodes of weekly Hg deposition delivering up to 15% of the annual Hg load from precipitation in a single week. Modeled 48-h back trajectories indicated air masses for these episodes often arrived from the south and southwest, crossing numerous stationary sources of Hg emissions releasing from 23 to more than 300 kg Hg per year. This analysis suggests that local and regional, rather than exclusively continental or global Hg emissions were likely contributing to the extreme episodes and at least in part, to the spatial patterns of precipitation-Hg deposition in the study area. Statistically significant temporal decreases in weekly precipitation-Hg concentrations in the study area between the periods 2001-2013 and 2014-2016 were observed, coinciding with reported reductions in Hg emissions in the USA required by implementation of national Hg emissions-control rules. These decreases in atmospheric-Hg concentrations are believed to have resulted in the reduced atmospheric-Hg deposition recorded because precipitation depths between the two periods were not significantly different. The Hg-monitoring data for the study area identified an atmospheric deposition response to decreased local and regional Hg emissions.

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Mercury in Indiana watersheds: Retrospective for 2001–2006

Cited by 3 publications

References 12 publications

Assessment of background concentrations of organometallic compounds (methylmercury, ethyllead and butyl- and phenyltin) in French aquatic environments

Assessment of background concentrations of organometallic compounds (methylmercury, ethyllead and butyl- and phenyltin) in French aquatic environments

Geochemical legacies and the future health of cities: A tale of two neurotoxins in urban soils

Spatial Patterns and Temporal Changes in Atmospheric-Mercury Deposition for the Midwestern USA, 2001–2016

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