Air-Water Gas Exchange of Toxaphene in Arctic Regions
grantor: University of Toronto The Henry's law constant (H, Pa m$\sp3$/mol) of technical toxaphene was determined by the air stripping method over a temperature range of 10 to 40$\sp\circ$C. The relationship to temperature (K) was: Log H = $-$3209/T + 10.42. Air and water samples were collected...
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| Format: | Thesis |
| Language: | English |
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1997
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| Online Access: | http://hdl.handle.net/1807/11423 http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0012/MQ29379.pdf |
| Summary: | grantor: University of Toronto The Henry's law constant (H, Pa m$\sp3$/mol) of technical toxaphene was determined by the air stripping method over a temperature range of 10 to 40$\sp\circ$C. The relationship to temperature (K) was: Log H = $-$3209/T + 10.42. Air and water samples were collected in arctic and sub-arctic regions during July-September 1993-94 to determine the air-water gas exchange of chlorobornanes (CHBs, i.e. toxaphene). CHB concentrations in surface water increased with latitude from 26 pg/L in the Bering-Chukchi seas to 81-95 pg/L in the Central Arctic Ocean and western Eurasian Basin and Greenland Sea. Air and water concentration data were used with the Henry's law constant, wind speed and fractional ice cover to calculate the water/air fugacity ratio and net flux. CHBs were under-saturated in all regions (average fugacity ratio of 0.44), implying net deposition from air to water. The average net flux of CHBs was $-$0.87 ng/m$\sp2$d into the ocean. M.A.Sc. |
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