Henry's law constants for hexachlorobenzene, p,p'-DDE and components of technical chlordane and estimates of gas exchange for Lake Ontario

被引:44
作者
Jantunen, LM [1 ]
Bidleman, TF [1 ]
机构
[1] Environm Canada, CARE, Meteorol Serv Canada, Egbert, ON L0L 1N0, Canada
关键词
air-water partition coefficient; Henry's law constant; organochlorine pesticides; gas exchange; physicochemical properties;
D O I
10.1016/j.chemosphere.2005.06.035
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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 log H = 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 m(3) 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. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1689 / 1696
页数:8
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