| Title: | Henry's law constants of chlorinated solvents at elevated temperatures |
| Author(s): | Chen F; Freedman DL; Falta RW; Murdoch LC; |
| Address: | "Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. feic@clemson.edu" |
| DOI: | 10.1016/j.chemosphere.2011.10.004 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Henry's law constants for 12 chlorinated volatile organic compounds (CVOCs) were measured as a function of temperature ranging from 8 to 93 degrees C, using the modified equilibrium partitioning in closed system (EPICS) method. The chlorinated compounds include tetrachloroethylene, trichloroethylene, cis-1,2-dichloroethylene, vinyl chloride, 1,1,1-trichloroethane, 1,1-dichloroethane, 1,2-dichloroethane, chloroethane, carbon tetrachloride, chloroform, dichloromethane, and chloromethane. The variation in Henry's constants for these compounds as a function of temperature ranged from around 3-fold (chloroethane) to 30-fold (1,2-dichloroethane). Aqueous solubilities of the pure compounds were measured over the temperature range of 8-75 degrees C. The temperature dependence of Henry's constant was predicted using the ratio of pure vapor pressure to aqueous solubility, both of which are functions of temperature. The calculated Henry's constants are in a reasonable agreement with the measured results. With the improved data on Henry's law constants at high temperatures measured in this study, it will be possible to more accurately model subsurface remediation processes that operate near the boiling point of water" |
| Keywords: | "Hydrocarbons, Chlorinated/*chemistry Models, Chemical Solubility *Temperature Thermodynamics Vapor Pressure Volatile Organic Compounds/*chemistry;" |
| Notes: | "MedlineChen, Fei Freedman, David L Falta, Ronald W Murdoch, Lawrence C eng Research Support, Non-U.S. Gov't England 2011/11/11 Chemosphere. 2012 Jan; 86(2):156-65. doi: 10.1016/j.chemosphere.2011.10.004. Epub 2011 Nov 8" |
