An evaluation of atmospheric deposition of trace elements into the Great Lakes.
High-volume air samplers were used to collect aerosol samples on Whatman 41 air filters at the Canadian air sampling stations Burnt Island, Egbert, and Point Petre. Once collected, the samples were analyzed for trace elements by neutron activation analysis. Air concentrations of over 30 trace elements were determined. A special focus was made to utilize Compton suppression gamma-ray spectroscopy and epithermal irradiations to enhance the detection limits of neutron activation analysis. These techniques allowed for the determination of trace elements at very low levels. Results of the study of the trace-metal dry deposition into Lakes Huron and Ontario indicated that the majority of the total deposition resulted from crustal materials. However, dry deposition is also a significant pathway for many toxic anthropogenic trace metals into the Great Lakes.
Biegalski
S
S
Department of Nuclear Engineering, University of Illinois, Urbana 61801, USA.
Landsberger
S
S
D000393:Air Pollutants / Q000737:chemistry*; D005069:Evaluation Studies as Topic; D009501:Neutron Activation Analysis; D014131:Trace Elements / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D000393:Air Pollutants; D014131:Trace Elements; D014874:Water Pollutants, Chemical