Titre du document / Document title

Sources of mercury wet deposition in Eastern Ohio, USA

Auteur(s) / Author(s)

KEELER Gerald J. ⁽¹⁾ ; LANDIS Matthew S. ⁽²⁾ ; NORRIS Gary A. ⁽²⁾ ; CHRISTIANSON Emily M. ⁽¹⁾ ; DVONCH J. Timothy ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ The University of Michigan Air Quality Laboratory, Ann Arbor, Michigan 48109, ETATS-UNIS
⁽²⁾ U.S. EPA Office of Research and Development, Research Triangle Park, North Carolina 27709, ETATS-UNIS

Résumé / Abstract

In the fall of 2002, an enhanced air monitoring site was established in Steubenville, Ohio as part of a multi-year comprehensive mercury monitoring and source apportionment study to investigate the impact of local and regional coal combustion sources on atmospheric mercury deposition in the Ohio River Valley. This study deployed advanced monitoring instrumentation, utilized innovative analytical techniques, and applied state-of-the-art statistical receptor models. This paper presents wet deposition data and source apportionment modeling results from daily event precipitation samples collected during the calendar years 2003-2004. The volume-weighted mean mercury concentrations for 2003 and 2004 were 14.0 and 13.5 ng L^-1, respectively, and total annual mercury wet deposition was 13.5 and 19.7 μg m^-2, respectively. Two new EPA-implemented multivariate statistical models, positive matrix factorization (PMF) and Unmix, were applied to the data set and six sources were identified. The dominant contributor to the mercury wet deposition was found by both models to be coal combustion (∼70%). Meteorological analysis also indicated that a majority of the mercury deposition found at the Steubenville site was due to local and regional sources.

Revue / Journal Title

Environmental science & technology   ISSN 0013-936X   CODEN ESTHAG 

Source / Source

2006, vol. 40, n^o19, pp. 5874-5881 [8 page(s) (article)] (37 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Chemical Society, Washington, DC, ETATS-UNIS  (1967) (Revue)

Mots-clés anglais / English Keywords

Heavy metal ; America ; North America ; United States ; Ohio ; Anthropogenic factor ; Matrix factorization ; Receptor model ; Multivariate analysis ; Statistical analysis ; Annual variation ; Sampling ; Wet deposition ; Atmospheric fallout ; Pollution source ; Identification ; Air pollution ; Mercury ;

Mots-clés français / French Keywords

Métal lourd ; Amérique ; Amérique du Nord ; Etats Unis ; Ohio ; Facteur anthropique ; Factorisation matricielle ; Modèle récepteur ; Analyse multivariable ; Analyse statistique ; Variation annuelle ; Echantillonnage ; Retombée humide ; Retombée atmosphérique ; Source pollution ; Identification ; Pollution air ; Mercure ;

Mots-clés espagnols / Spanish Keywords

Metal pesado ; America ; America del norte ; Estados Unidos ; Ohío ; Factor antrópico ; Factorizacion matricial ; Modelo receptor ; Análisis multivariable ; Análisis estadístico ; Variación anual ; Muestreo ; Recaída húmeda ; Recaída atmosférica ; Fuente polución ; Identificación ; Contaminación aire ; Mercurio ;

Localisation / Location

INIST-CNRS, Cote INIST : 13615, 35400015228985.0060