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Title: Retention of As and Sb in ombrotrophic peat bogs: records of As, Sb, and Pb deposition at four Scottish sites

Possible postdepositional As migration in ombrotrophic peat bogs was investigated by comparing depth profiles of As with those of Sb and Pb, two elements considered to be essentially immobile in peat, and those of redox-sensitive, potentially mobile nutrient elements such as Mn, Fe, P, and S in {sup 210}Pb-dated cores from four Scottish bogs. Concentration profiles of As were similar to those of Sb and Pb rather than these other elements, indicating that As is bound strongly to organic matter and is relatively immobile in ombrotrophic peat. Historical records of atmospheric anthropogenic As, Sb, and Pb deposition during the industrial and postindustrial periods were derived, site-specific maxima (up to 1.55, 1.33, and 45 mg m{sup -2} y{sup -1}, respectively) occurring between the late 1890s and 1960s, reflecting emissions from diverse sources such as mining and smelting, coal combustion, and also, in the case of Pb, exhaust emissions from the use of leaded gasoline. Since the mid-1980s, fluxes of Pb decreased (4-7 fold) more rapidly than those of As and Sb (2-3 fold), attributable to both the gradual elimination of leaded gasoline and recent new sources of the latter elements. Relative trends in derived anthropogenic As, Sb, and Pb deposition largelymore » agreed with other Scottish peat and moss archive records, direct measurements of deposition, and UK emissions, i.e., four different types of data source. 36 refs., 3 figs., 1 tab.« less
Authors:
; ; ;  [1]
  1. University of Edinburgh, Edinburgh (United Kingdom). School of GeoSciences
Publication Date:
OSTI Identifier:
21176818
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Science and Technology; Journal Volume: 43; Journal Issue: 6; Other Information: Joanna.Cloy@ed.ac.uk
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; LAND POLLUTION; UNITED KINGDOM; COAL MINING; ARSENIC; ANTIMONY; LEAD; RETENTION; WETLANDS; PEAT; DEPOSITION; INDUSTRY; POLLUTION SOURCES; COAL; COMBUSTION; SMELTING; GASOLINE; ECOLOGICAL CONCENTRATION; MIGRATION; DEPTH; MOBILITY; ENVIRONMENTAL TRANSPORT; LEAD 210; GEOCHEMISTRY; ISOTOPE DATING