Biomedical Engineering Reference
In-Depth Information
TABLE 2.3
(
Continued
)
Physical and
Chemical Properties
Methanol
Gasoline
Benzene
1.087
10
4
Henry's Law constant [
] (at
25
C)
—
0.22
1.65
10
9
9.95
10
10
Liquid dispersion coefficient
(m
2
/s) (at 25
C)
—
Log organic carbon partition
coefficient (log K
oc
)
0.921
0.44
c
—
1.8-1.99
1.50-2.16
c
0.82
f
Log octanol-water partition
coefficient (log K
ow
)
—
2.13
1.56-2.15
c
0.77
f
0.75
c
0.31
c
0.16
c
Flammability limits (FL)
b
Lower (LFL)
—
Volume percent
6.0
1.4
Temperature (
C)
7
43
Upper (UFL)
—
Volume percent
36.5
7.6
Temperature (
C)
43
30 to
12
Flash point (
C)
12
a
42
—
Vapor density (at 1 atm; 10
C)
b
1.4
2-5
3.4
a
Merck Index (1989).
b
Machiele (1989).
c
Zogorski et al. (1997).
d
USDOE (1991).
e
Methanex (2006).
f
Mackay et al. (1992).
2.2.3 Soil/Water Partitioning
The soil/water partition coefficient, K
d
, specifies the equilibrium ratio
of a contaminant's concentration in/on the solid phase to that in the
aqueous phase, thus, determining the distribution of a chemical between
soil and water under equilibrium conditions. In addition, the K
d
value
can be used to estimate the rate of movement of a chemical
in
