Påverkan av gruvdrift på sedimentegenskaper och toxicitet för akvatiska organismer i norra Sverige

The data contain information on spatial and temporal variation in sediment properties and toxicity estimates of three lakes in close proximity to an abandoned Pb/Zn-mine. One sediment profile per lake was analyzed and the age of different sediment layers was estimated, to be able to correlate the results with known activities during the development of the mine.

Number of variables: 17
Number of rows (incl. header): 76

Variable List:
Site: Lake origin of the sediment core (Lake 1, Lake 2 or Lake 3)
Depth: Depth of the analyzed sediment layer (cm) for each core
Zn: Zinc concentration in the sediment layer (mg kg-1)
Pb: Lead concentration in the sediment layer (mg kg-1)
Density: Density of the sediment layer (g cm-3)
LOI: Loss on ignition for each sediment layer (%)
TOC: Total organic carbon for each sediment layer (%)
PECQ: Predicted effect concentration quotient for each sediment layer
PECQ.norm: Predicted effect concentration quotient for each sediment layer, normalized to total organic carbon content
210Pb: 210Pb activity for each sediment layer (Bq kg-1), measured at 46.5keV
SD(210Pb): Standard deviation of 210Pb activity for each sediment layer (Bq kg-1), measured at 46.5keV
214Pb(295keV): 214Pb activity for each sediment layer (Bq kg-1), measured at 295keV
SD(295keV): Standard deviation of 214Pb activity for each sediment layer (Bq kg-1), measured at 295keV
214Pb(351 keV): 214Pb activity for each sediment layer (Bq kg-1), measured at 351keV
SD(351 keV): Standard deviation of 214Pb activity for each sediment layer (Bq kg-1), measured at 351keV
137Cs: 137Cs activity for each sediment layer (Bq kg-1), measured at 662keV
SD(137Cs): Standard deviation of 137Cs activity for each sediment layer (Bq kg-1)

Missing data codes: NA – not analyzed