Objectives: To determine the temporal and spatial trends and accumulation rates of heavy metals and persistent organic contamineants and to differentiate between natural and anthropogenic sources of heavy metals. Summary: Heavy metal and persistent organic contaminant concentrations and accumulation rate are measured in Pb-210 dated sediment cores of small lakes in different areas of Finnish Lapland.
Lake water
Lake Pahtajärvi (N 68,2 S 68,2 W 24,0 E 24,0): PCBs, Planar CBs, Chlordanes, DDTs, DDE, Dieldrin, Dioxins/Furans, PCDD, TCDD, Benzofuran, PCDF, TCDF, HCB, HCH, PAH, Toxaphene, Pb, Al, As, Cd, Cr, Cu, Fe, Hg, Ni, Se, Zn, Mn, Ca, Mg, K, Na, Cl, F, TOC Lake Kenttälampi (N 66,8 S 66,8 W 28,8 E 28,8): Pb, Al, As, Cd, Cr, Cu, Fe, Hg, Ni, Se, Zn, Mn, Ca, Mg, K, Na, Cl, F Lake Sierram (N 69,2 S 26,8): PCBs, Planar CBs, Chlordanes, DDTs, DDE, Dieldrin, Dioxins/Furans, PCDD, TCDD, Benzofuran, PCDF, TCDF, HCB, HCH, PAH, Toxaphene, Pb, Al, As, Cd, Cr, Cu, Fe, Hg, Ni, Se, Zn, Mn, Ca, Mg, K, Na, Cl, F, TOC Lake Nitsijärvi (N 69,3 S 28,0) Pb, Al, As, Cd, Cr, Cu, Fe, Hg, Ni, Se, Zn, Mn, Ca, Mg, K, Na, Cl, F Lake 222 (N 69,5 S 29,2) PCBs, Planar CBs, Chlordanes, DDTs, DDE, Dieldrin, Dioxins/Furans, PCDD, TCDD, Benzofuran, PCDF, TCDF, HCB, HCH, PAH, Toxaphene, Pb, Al, As, Cd, Cr, Cu, Fe, Hg, Ni, Se, Zn, Mn, Ca, Mg, K, Na, Cl, F, TOC
Storage of samples: Dry material (metals) are deep frozen -20 C in Lapland Regional Environment Centre P.O.Box 8060 96101 Rovaniemi Finland
- Sampling was performed by sediment coring (stratigraphy) Method reference : U.S. ACRP, EPA/600/R-92/210 - Samples were stored in cold room (+4 C) before extraction - Extraction: HNO3 digestion (metals), organic extraction (org. Contaminants) - Analysis description: ICP, ICP-MS (metals), GC/MS (organic contaminants) Finnish Environment Institute P.O.Box 140 FIN-00251 Helsinki Finland
Sampling procedures according to U.S. ACRP, EPA/600/R-92/210
Lapland Regional Environment Centre P.O. Box 8060 96101 Rovaniemi Finland
UNEP GEMS Water Quality network
Monitoring of Bioaccumulating Compounds in Freshwaters
Heavy metals in sediments (3 lakes), and biota (4-6 lakes) were reported in 1990-1992 as a part of HAPRO Research Project on Acidification. Sampling has covered 5 sites in Lapland, with sediment stratigraphy determined. Heavy metals (5 lakes) and persistant organic contaminants in sediments (3 lakes) and fish have been determined from the same lakes. Selection is based on undisturbed sediments, fish species assemblages (Arctic Char preferred) and site location (geography and soil geology).