Measurement of the Henry's Constant of Dimethyl Selenide as a Function of Temperature
Abstract
The Henry's constant (Kh) represents the equilibrium partitioning a gaseous compound between the vapor and liquid phases, and therefore is an important parameter describing the mobility of the compound in soil. Using the method of headspace analysis, we determined the Kh of dimethyl selenide (DMSe) at temperatures ranging from 4 to 40°C. The Kh value was derived by regression analysis of the liquid phase concentration observed at various liquid volumes based on mass balance. The dimensionless Kh of DMSe ranged from 0.032 to 0.135, corresponding to a liquid concentration that is 7 to 31 times higher than the vapor concentration. The nonlinear regression equation describing the dependence of Kh on temperature (T, °C) is Kh = 0.0248exp (0.0418 T), indicating that a higher temperature favors partitioning of DMSe to the vapor phase and thus increases transport of DMSe from soil to the atmosphere.
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Methylated Se compounds are highly soluble and the concentrations in the aqueous-phase usually exceed those in the gaseous phase.
“Methylated Se compounds are highly soluble and the concentrations in the aqueous-phase usually exceed those in the gaseous phase (as predicted by their Henry’s law constants [287].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [287]
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Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review
Winkel, L., Vriens, B., Jones, G., Schneider, L., Pilon-Smits, E., & Bañuelos, G. (2015) · Nutrients · doi:10.3390/nu7064199 · Cited by 476 · see citing works
“Methylated Se compounds are highly soluble and the concentrations in the aqueous-phase usually exceed those in the gaseous phase (as predicted by their Henry’s law constants [287].”
BackgroundBiomethylation of selenium and tellurium: microorganisms and plants
Chasteen, T. G., & Bentley, R. (2003) · Chemical Reviews · doi:10.1021/cr010210+ · Cited by 352 · see citing works
A method to quantitatively trap volatilized organoselenides for stable selenium isotope analysis
Schilling, K., & Wilcke, W. (2011) · Journal of Environmental Quality · doi:10.2134/jeq2010.0474 · Cited by 12 · see citing works
- Authors
- Guo, L., Jury, W. A., & Frankenberger, W. T.
- Affiliations
- University of California, Riverside (US)
- Corresponding author
- Jury, William A.
- ORCID
- Guo, Lei
- Venue
- Journal of Environmental Quality
- Publisher
- Wiley
- Published
- 2000-09
- Volume
- 29
- Issue
- 5
- Pages
- 1715-1717
- ISSN
- 0047-2425 (ISSN-L)
- 1537-2537
- OpenAlex
- W1978374432
- Cited by
- 7
- References
- 0
- Citations by year
- 2021: 1 · 2015: 1
- FWCI
- 0.92
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Environmental Quality (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Pollution › Pesticide and Herbicide Environmental Studies
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- dimethylselenide, Henry's law constant, temperature dependence, headspace analysis, soil mobility, selenium compounds, nonlinear regression
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