| Volatilization | The Henry's Law constant for ethylbenzene is 7.88X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that ethylbenzene is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3.1 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 4.1 days(SRC). Ethylbenzene's Henry's Law constant(1) indicates that volatilization from moist soil surfaces may occur(SRC). Ethylbenzene is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 9.6 mm Hg(3).
Literature: (1) Sanemasa I et al; Bull Chem Soc Jpn 55: 1054-62 (1982) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Chemicals: Data Compilation. Design Institute for Physical Property Data, American Institute of Chemical Engineers. New York, NY: Hemisphere Pub Corp, (1996) |
| Soil Adsorption | Measured ethylbenzene Koc values of 224(1), 240(2) and 257(3) have been reported. According to a classification scheme(4), these Koc values suggest that ethylbenzene is expected to have moderate mobility in soil. Sorption and desorption experiments demonstrated that the sorption process of ethylbenzene on marine sediments is reversible and that the sorption is even lower than expected from the log Kow data and the organic carbon content of the sediment(5); it was concluded that the marine sediment compartment is not an important sink for ethylbenzene(5). A soil leaching column study estimated an ethylbenzene Koc of 240 using a chromatographic methodology(6).
Literature: (1) Schuurmann G et al; Environ Sci Technol 40: 7005-7011 (Supporting information) (2006) (2) ATSDR; Toxicological Profile for Ethylbenzene. Atlanta, GA: Agency for Toxic Substances and Disease Registry, US Public Health Service (2010). Available from, as of June 15, 2016: http://www.atsdr.cdc.gov/toxprofiles/index.asp (3) Szabo G; Chemosphere 24: 403-412 (1992) (4) Swann RL et al; Res Rev 85: 17-28 (1983) (5) Dewulf J et al; Water Research 30: 3130-3138 (1996) (6) Xu F et al; J Environ Qual 30: 1618-1623 (2001) |
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