Environmental Engineering Reference
In-Depth Information
10
Interpreted overall capture boundary
Former ABC facility boundary
8
Combined GCTL plume boundary
EXPLANATION
Extraction well
Tr e n c h
Simulated head
GCTL = Groundwater cleanup target level
0
250
Scale
500 feet
FIGURE 8.5
Coni guration of extraction trenches and extraction wells proposed for remediating 1,4-dioxane
and VOCs at the former American Beryllium site (Arcadis-BBL, 2007c).
To normalize operating parameters between pilot tests, a i rst-order rate relationship was used to
establish a rate constant for the Photo-Cat reaction with the site contaminants. The simple i rst-
order equation for the rate constant
k
is
ln
(
C
0
P
)
⋅ ln
(
C
0
C
)
∝
(
ν
f
C
)
,
1
__
___
__
___
k
=
t
⋅
(8.1)
where
C
0
is the initial concentration,
C
is the i nal concentration,
t
is the time (in s),
k
is the i rst-
order rate constant,
v
f
is the l ow rate (in L/min), and
P
is the power (in kW). Because time is
directly proportional to the power used to operate the Photo-Cat system, l ow in liters per minute
is divided by power in kilowatts, giving units of (L/min)/kW for the i rst-order rate constant in
Equation 8.1.
Search WWH ::
Custom Search