Henry's law constants for hexachlorobenzene, p,p'-DDE and components of technical chlordane and estimates of gas exchange for Lake Ontario.
The Henry's law constants (HLC) for trans- and cis-chlordane (TC, CC), trans-nonachlor (TN), hexachlorobenzene (HCB) and p,p'-DDE were determined by the gas-stripping method over a temperature range of 5-35 degrees C. The HLC variation versus temperature (K) was described by logH=m/T+b. Parameters of this equation were (with standard deviations) TC: m=-1524+/-158, b=6.58+/-0.54; CC: m=-1786+/-209, b=7.42+/-0.71; TN m=-2068+/-284, b=8.44+/-0.97; HCB: m=-3013+/-174, b=11.60+/-0.59 and p,p'-DDE: m=-2043+/-240, b=8.37+/-0.82. The HLCs (Pa m3 mol(-1)) at 25 degrees C (298.15 K) were: TC=29; CC=27; TN=32; p,p'-DDE=33 and HCB=35. These HLCs values were used to calculate fugacity ratios from paired air and water data from Lake Ontario, July 1998. The resulting fugacity ratios predict that volatilization was occurring for all compounds during that month.
Jantunen
Liisa M
LM
Centre for Atmospheric Research Experiments, Meteorological Service of Canada, Environment Canada 6248 Eighth Line, Egbert, Ont., Canada L0L 1N0. liisa.jantunen@ec.gc.ca
Bidleman
Terry F
TF
D000393:Air Pollutants / Q000032:analysis*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002706:Chlordan / Q000032:analysis*; D003633:Dichlorodiphenyl Dichloroethylene / Q000032:analysis*; D017753:Ecosystem; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis*; D005740:Gases / Q000032:analysis*; D006581:Hexachlorobenzene / Q000032:analysis*; D009864:Ontario; D014835:Volatilization
D000393:Air Pollutants; D005740:Gases; D002706:Chlordan; D003633:Dichlorodiphenyl Dichloroethylene; D006581:Hexachlorobenzene