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ATMOSPHERIC MERCURY MEASUREMENTS: RECENT OBSERVATION IN THE GREAT LAKES BASIN
Citation:
Hoyer, M., G. Keeler, C. Lamborg, AND A. Hoffman. ATMOSPHERIC MERCURY MEASUREMENTS: RECENT OBSERVATION IN THE GREAT LAKES BASIN. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/244 (NTIS PB93121002).
Description:
In order to characterize ambient levels of vapor phase and particle mercury at source and receptor locations in the Great Lakes Basin, and to diagnose source regions of atmospheric mercury, samples were collected at three locations: llinois Institute of Technology (IIT) in Chicago, IL and South Haven, MI (SHA) and aboard the R/V Laurentian (LAU). apor phase mercury samples were collected onto gold-coated sand traps and analyzed by cold vapor atomic fluorescence (CVAFS). articulate phase mercury samples were collected onto both Teflon filters and prefired glass fiber filters. eflon filters were analyzed by neutron activation analysis (NAA) and glass fiber filters were analyzed by CVAFS after acid digestion/extraction. esults of particle phase analysis from glass fiber filter samples and results of vapor phase mercury samples are presented here. ean vapor phase mercury concentrations were 8.7 ng/m3 at IIT, 2.3 ng/m3 on the LAU and 2.0 ng/m3 in SHA. ean particle phase mercury concentrations by site were 97.5 pg/m3 at IIT, 28.4 pg/m3 on the LAU and 18.6 pg/m3 in SHA. articulate phase mecury comprised 1.7% of total mercury measured on the average at IIT, 1.3% on the LAU and 1.2% at SHA.
