| Volatilization | The Henry's Law constant for ethylene oxide is 1.48X10-4 atm-cu m/mole(1). This Henry's Law constant indicates that ethylene oxide is expected to volatilize 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 6 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 days(SRC). Ethylene oxide is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.31X10+3 mm Hg(3). Although no data on the volatilization of ethylene oxide from soil could be found, a study of the dissipation of ethylene oxide from fumigated commodities gave half-life values of 4 hr to 17.5 days(4).
Literature: (1) Conway RA et al; Environ Sci Technol 17:107-112 (1983) (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. Washington, DC: Taylor and Francis (1985) (4) Bogyo DA et al; Investigations of Selected Potential Environmental Contaminants: Epoxides. USEPA-560/11-80-005 p. 70-90 (1980) |
| Soil Adsorption | Koc of ethylene oxide was reported to be 2.20(1). According to a classification scheme(2), this estimated Koc value suggests that ethylene oxide is expected to have very high mobility in soil(SRC).
Literature: (1) Chu W, Chan KH; Sci Total Environ 248: 1-10 (2000) (2) Swann RL et al; Res Rev 85: 17-28 (1983) |
Home
search mVOC
Features / Tools
mVOC Literature
Help