Geoscience Reference
In-Depth Information
Figure
5.3.
Typical
configurations
of
electrodes.
(a)
one-dimensional
configuration
and
(b)
two-
dimensional configuration (Alshawabkeh et al ., 1999b).
Impact of electrode configuration on electrode requirements and size of ineffective areas 1) .
Table 5.3.
No. of electrodes
Electrode
per unit area
No. of electrodes
Area of
Configuration
distance
spacing
per cell ( α )
cell
N
% increase
L 2
1/ L 2
1-D
L
L
1
0
L 2
2/ L 2
L
L /2
2
100
L 2
3/ L 2
L
L /3
3
200
2 1 / 2 R
R 2
1/ R 2
2-D
Square
R
2
0
(3 3 / 2 R 2 )/2
2/(3 1 / 2 R 2 )
Hexagonal
R
R
3
15.5
1) From Alshawabkeh et al . (1999b).
of electrodes required can be estimated depending on the configuration, distance, and spacing of
electrodes.
The number ( N ) of electrodes per unit surface area of the site to be treated (Alshawabkeh et al .,
1999b):
N = ( α/L 2 ) 1-D = ( α/πR 2 ) 2-D
(5.20)
where α is the number of electrodes per cell, and L and R are the distances of electrodes within
1-D and 2-D configurations, respectively. Representative values for α , L , and R are given in
Table 5.3 . Refer to Turer and Genc (2005) and Almeira et al . (2009) for more detailed infor-
mation about the impact of different electrode configurations on the efficiency of electrokinetic
remediation.
The shape of electrodes is important because it determines the surface area of the electrodes
and affects the reactions occurring on the electrode surface. The common shapes used frequently
are plate, rod, net, and cylinder.
 
 
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