Environmental Engineering Reference
In-Depth Information
TABLE 3.4
Modeled Volatilization Half-Lives and Volatilization Residence Times for Solvent-Stabilizer
Compounds in a Model River and a Model Lake
Estimated
Volatilization
from Model
River (Half-Life)
Estimated
Volatilization
from Model Lake
(Half-Life)
Time for 99%
Removal from
Model River
Time for 99%
Removal from
Model Lake
Chemical Name
a
Cyclohexane
b
0.9 h
6.3 h
3.6 days
25 days
Isopentane
0.9 h
6.3 h
3.4 days
24 days
Isoprene
0.9 h
6.3 h
3.3 days
23 days
Diisobutylene
1.1 h
7.7 h
4.2 days
29 days
Dichloromethane
b
1.1 h
7.7 h
3.7 days
26 days
Methyl chloroform
b
1.2 h
8.4 h
4.6 days
32 days
Trichloroethylene
1.2 h
8.4 h
4.6 days
32 days
Carbon tetrachloride
1.3 h
9.1 h
4.9 days
34 days
Perchloroethylene
1.4 h
9.8 h
5.1 days
36 days
1,2-Butylene oxide
b
3.6 h
1.1 days
4.6 days
32 days
Cyclohexene oxide
4.5 h
1.3 days
5.5 days
39 days
Triethylamine
5 h
1.5 days
5.8 days
41 days
Ethyl acetate
b
5.1 h
1.5 days
5.6 days
39 days
Isopropyl acetate
b
6.2 h
1.8 days
5 days
35 days
Diisopropylamine
7.2 h
2.1 days
6.8 days
48 days
Propylene oxide
b
7.2 h
2.1 days
5.9 days
41 days
Acetonitrile
12 h
3.5 days
7.5 days
53 days
2-Butanone
b
16 h
4.7 days
7.3 days
51 days
Nitromethane
17 h
5.0 days
10 days
70 days
Nitroethane
19 h
5.5 days
8.3 days
58 days
Epichlorohydrin
20 h
5.8 days
12 days
84 days
1,3-Dioxolane
1.4 days
9.8 days
13 days
91 days
Styrene oxide
1.7 days
12 days
23 days
161 days
Nonylphenol
1.8 days
13 days
18 days
126 days
tert
-Amyl alcohol
2.6 days
18 days
22 days
154 days
Methanol
3.1 days
22 days
35 days
245 days
Pyridine
3.1 days
22 days
25 days
175 days
sec
-Butyl alcohol
b
3.6 days
25 days
29 days
203 days
tert
-Butyl alcohol
b
3.6 days
25 days
29 days
203 days
1,4-Dioxane
b
4.8 days
34 days
56 days
1.1 years
Butoxymethyl oxirane
6.4 days
45 days
74 days
1.4 years
2-Methyl-3-butyn-2-ol
8.7 days
61 days
66 days
1.3 years
2,6-di-
tert
-Butyl-
p
-cresol
16 days
112 days
123 days
2.4 years
p
-
tert
-Amyl phenol
23 days
161 days
173 days
3.3 years
Diepoxybutane
28 days
196 days
303 days
5.8 years
Thymol
62 days
1.2 years
1.9 years
13.3 years
Phenol
71 days
1.4 years
2.1 years
15 years
Notes:
The times predict only volatility; biodegradation, photolysis, sorption, hydrolysis, etc., are not addressed. Half-lives
shown are exclusive of other fate processes such as photodegradation, hydrolysis, and biodegradation. Model assump-
tions: river = 1 m deep, l ow is 1 m/s, wind speed is 5.0 m/s; lake = 1 m deep, wind velocity is 0.5 m/s, and circulation
or current is 0.05 m/s. Modeled using EPI Suite™ version 3.20 (USEPA, 2007a).
a
Nonitalics compounds are stabilizers. Italics compounds are chlorinated solvents; these are listed for comparison to show
whether the stabilizer is likely to evaporate with the solvent or remain behind in the soil where it can be leached down to
groundwater.
b
Chemical is included in the EPI Suite™ training set.
Search WWH ::
Custom Search