Turbulence effects on volatilization rates of liquids and solutes
Environmental Science & Technology
By: J.-F. Lee, H.-P. Chao, C. T. Chiou, and M. Manes
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Abstract
Volatilization rates of neat liquids (benzene, toluene, fluorobenzene, bromobenzene, ethylbenzene, m-xylene, o-xylene, o-dichlorobenzene, and 1-methylnaphthalene) and of solutes (phenol, m-cresol, benzene, toluene, ethylbenzene, o-xylene, and ethylene dibromide) from dilute water solutions have been measured in the laboratory over a wide range of air speeds and water-stirring rates. The overall transfer coefficients (KL) for individual solutes are independent of whether they are in single- or multi-solute solutions. The gas-film transfer coefficients (kG) for solutes in the two-film model, which have hitherto been estimated by extrapolation from reference coefficients, can now be determined directly from the volatilization rates of neatliquids through anew algorithm. The associated liquid-film transfer coefficients (KL) can then be obtained from measured KL and kG values and solute Henry law constants (H). This approach provides a novel means for checking the precision of any kL and kG estimation methods for ultimate prediction of KL. The improved kG estimation enables accurate K L predictions for low-volatility (i.e., low-H) solutes where K L and kGH are essentially equal. In addition, the prediction of KL values for high-volatility (i.e., high-H) solutes, where KL ??? kL, is also improved by using appropriate reference kL values.
Suggested Citation
Lee, J., Chao, H., Chiou, C.T., and Manes, M., 2004, Turbulence effects on volatilization rates of liquids and solutes: Environmental Science & Technology, v. 38, no. 16, p. 4327-4333, https://doi.org/10.1021/es0353964.
ISSN: 1520-5851 (online)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Turbulence effects on volatilization rates of liquids and solutes |
| Series title | Environmental Science & Technology |
| DOI | 10.1021/es0353964 |
| Volume | 38 |
| Issue | 16 |
| Publication Date | July 08, 2004 |
| Year Published | 2004 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Environmental Science and Technology |
| First page | 4327 |
| Last page | 4333 |