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Titolo:
Mercury accumulation in foliage over time in two northern mixed-hardwood forests
Autore:
Rea, AW; Lindberg, SE; Scherbatskoy, T; Keeler, GJ;
Indirizzi:
Univ Michigan, Air Qual Lab, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 ir Qual Lab, Ann Arbor, MI 48109 USA Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab Oak Ridge TN USA 37831 tl Lab, Oak Ridge, TN 37831 USA Univ Vermont, Sch Nat Resources, Burlington, VT 05405 USA Univ Vermont Burlington VT USA 05405 Resources, Burlington, VT 05405 USA
Titolo Testata:
WATER AIR AND SOIL POLLUTION
fascicolo: 1-4, volume: 133, anno: 2002,
pagine: 49 - 67
SICI:
0049-6979(200201)133:1-4<49:MAIFOT>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATMOSPHERIC DEPOSITION; DRY DEPOSITION; PLANT UPTAKE; VAPOR; EXCHANGE; TRANSFORMATION; METHYLMERCURY; THROUGHFALL; VEGETATION; ECOSYSTEMS;
Keywords:
dry deposition; foliage; gaseous Hg-0; Lake Champlain Watershed; Lake Huron Watershed; litterfall; mercury; soil water; trace elements;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Rea, AW US EPA, MD-56, Res Triangle Pk, NC 27711 USA US EPA MD-56 Res Triangle Pk NC USA 27711 riangle Pk, NC 27711 USA
Citazione:
A.W. Rea et al., "Mercury accumulation in foliage over time in two northern mixed-hardwood forests", WATER A S P, 133(1-4), 2002, pp. 49-67

Abstract

Concentrations of mercury (Hg) in live foliage increased ten-fold from spring bud break (mean +/- std. dev. from both sites: 3.5 +/-1.3 ng g(-1)) to autumn litterfall (36 +/-8 ng g(-1)). Mercury in foliage did not behave similarly to eight other elements with known soil or aerosol sources (Aluminum(Al), Vanadium (V), Strontium (Sr), Rubidium (Rb), Copper (Cu), Zinc (Zn),Barium (Ba), and lead (Pb)), suggesting that Hg originated from a distinctpathway. Based on measured and modeled data, uptake of only 25% of the available ambient dry deposited Hg-0 could explain all of the Hg measured in foliage throughout the growing season. Estimates of gaseous elemental Hg (Hg-0) uptake from soil water accounted for 3-14%% of the Hg in litterfall. Mercury deposition to forested sites in the Lake Champlain and Lake Huron basins was highest in litterfall (40%), followed by total throughfall (33%), and precipitation (27%). The Hg flux in litterfall was 15.8 +/-1.9 mug m(-2)yr(-1) to the Lake Champlain Watershed in 1995 and was 11.4 +/-2.8 mug m(-2) yr(-1) to the Lake Huron Watershed in 1996. In comparison, the Hg fluxesin precipitation and total throughfall were 9.0 +/-0.6 and 11.6 +/-0.7 mugm(-2) yr(-1) in the Lake Champlain Watershed (1995), and 8.7 +/-0.5 and 10.5 +/-1.0 mug m(-2) yr(-1) in the Lake Huron Watershed (1996).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 19:16:13