Dec 5, 2003

Atmospheric heavy metal deposition in Finland during 1985-2000 using mosses as bioindicators

The Science of the Total Environment
J PoikolainenJ Karhu

Abstract

Heavy metal deposition and changes in the deposition patterns were investigated on the basis of surveys carried out in 1985, 1990, 1995 and 2000. The concentrations of 10 elements (Cd, Cr, Cu, Fe, Ni, Pb, Zn and V; and As and Hg since 1995) were determined on moss (Hylocomium splendens, Pleurozium schreberi) samples collected from the same permanent sample plots in each survey. The heavy metal concentrations, apart from those in southernmost Finland and close to a number of major emission sources, were relatively low. The mean concentrations of all the heavy metals decreased during the period covered by the surveys. The metals that showed the strongest decrease in concentration since 1985 were Pb (78%), V (70%) and Cd (67%). The concentrations of the other heavy metals decreased by 16-34%. The concentrations of Cr, Cu and Ni were clearly associated with local emission point sources and changes in emission levels. The concentrations of As and Hg, which were measured for the first time during the 1995 survey, decreased on the average by 26% and 10%, respectively.

Mentioned in this Paper

Mosses
Chromium product (pharmacologic preparation)
Feathers
Habronattus splendens
Pleurozium schreberi
Hylocomium splendens
Air Pollutants, Environmental
Halobates splendens
Entire Feather
Metals, Heavy

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